Items you think you can depend on
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Everyone,
Over time we can grow complacent on many service items such as electrical power, water and other services over time. Well that can be concerning as many hidden changes can result in damage to your home and equipment. Late late night I came in to my den and was closing down my ham station when I notice my fault light on my KPA500 linear was on. I powered it down and retired for the evening. This morning I powered up the linear (KPA500) and at once I got a fault light and had a high voltage alert. I powered down the linear and checked my input line voltage. It was 137 volts RMS! To be sure it wasn't my imagination I rechecked the voltage with a different meter with the same result. In checking the 220 volt outlet I measured 274 volts! My linear is set up for 220 volts operation and it was getting over 90 volts HV. I alerted the neighbors and cut the main breaker to the house. I then called the power company's service number and reported the problem. A short time later they called me back and reported that a regulator in the local sub station had "Stuck" and was reset. In rechecking my line voltage it was 118 volts on the low side and 236 volts on the high side. In the 12 years we have been at this qth we found that our town's locally run power company has been very reliable but this experience showed me that it is not a bad idea to check your line voltage every once in a while. 73 -- Dave Robertson KD1NA ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: Items you think you can depend on
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Funny you posted this.
I monitor BOTH sides of the 110/220 VAC service and have alarms set to trigger either line >125 or >250 VAC. Being in the country THINGS happen. Always expect the unusual. Mel, K6KBE From: David Robertson <[hidden email]> To: Elecraft <[hidden email]> Sent: Monday, September 4, 2017 9:39 AM Subject: [Elecraft] Items you think you can depend on Everyone, Over time we can grow complacent on many service items such as electrical power, water and other services over time. Well that can be concerning as many hidden changes can result in damage to your home and equipment. Late late night I came in to my den and was closing down my ham station when I notice my fault light on my KPA500 linear was on. I powered it down and retired for the evening. This morning I powered up the linear (KPA500) and at once I got a fault light and had a high voltage alert. I powered down the linear and checked my input line voltage. It was 137 volts RMS! To be sure it wasn't my imagination I rechecked the voltage with a different meter with the same result. In checking the 220 volt outlet I measured 274 volts! My linear is set up for 220 volts operation and it was getting over 90 volts HV. I alerted the neighbors and cut the main breaker to the house. I then called the power company's service number and reported the problem. A short time later they called me back and reported that a regulator in the local sub station had "Stuck" and was reset. In rechecking my line voltage it was 118 volts on the low side and 236 volts on the high side. In the 12 years we have been at this qth we found that our town's locally run power company has been very reliable but this experience showed me that it is not a bad idea to check your line voltage every once in a while. 73 -- Dave Robertson KD1NA ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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Yes indeed! For many years, unscrupulous electric power companies have
been capitalizing on the fact that they send electrons to our house and charge us for them, we toast the bread with them, and then ... get this ... the electrons we paid for go back to the power company!! They get away with this because none of us ever inspect our electricity closely. 73, Fred ["Skip"] K6DGW Sparks NV DM09dn Washoe County > From: David Robertson<[hidden email]> > To: Elecraft<[hidden email]> > Sent: Monday, September 4, 2017 9:39 AM > Subject: [Elecraft] Items you think you can depend on > > > In the 12 years we have been at this qth we found that our town's locally > run power company has been very reliable but this experience showed me that > it is not a bad idea to check your line voltage every once in a while. > 73 > > -- Dave Robertson KD1NA ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: Items you think you can depend on
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Yes, but those electrons are really tired after all the work they did and need to go home to rest and regenerate….
Ken K6MR From: Fred Jensen<mailto:[hidden email]> Sent: Monday, September 4, 2017 11:05 To: [hidden email]<mailto:[hidden email]> Subject: Re: [Elecraft] Items you think you can depend on Yes indeed! For many years, unscrupulous electric power companies have been capitalizing on the fact that they send electrons to our house and charge us for them, we toast the bread with them, and then ... get this ... the electrons we paid for go back to the power company!! They get away with this because none of us ever inspect our electricity closely. 73, Fred ["Skip"] K6DGW Sparks NV DM09dn Washoe County > From: David Robertson<[hidden email]> > To: Elecraft<[hidden email]> > Sent: Monday, September 4, 2017 9:39 AM > Subject: [Elecraft] Items you think you can depend on > > > In the 12 years we have been at this qth we found that our town's locally > run power company has been very reliable but this experience showed me that > it is not a bad idea to check your line voltage every once in a while. > 73 > > -- Dave Robertson KD1NA ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: Items you think you can depend on
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In reply to this post by k6dgw
*This means that an electric company can sell a customer the same batch of
electricity thousands of times a day and never get caught, since very few customers take the time to examine their electricity closely. In fact, the last year any new electricity was generated was 1937.* On Mon, Sep 4, 2017 at 2:04 PM, Fred Jensen <[hidden email]> wrote: > Yes indeed! For many years, unscrupulous electric power companies have > been capitalizing on the fact that they send electrons to our house and > charge us for them, we toast the bread with them, and then ... get this ... > the electrons we paid for go back to the power company!! They get away > with this because none of us ever inspect our electricity closely. > > 73, > > Fred ["Skip"] K6DGW > Sparks NV DM09dn > Washoe County > >> From: David Robertson<[hidden email]> >> To: Elecraft<[hidden email]> Sent: Monday, September 4, >> 2017 9:39 AM >> Subject: [Elecraft] Items you think you can depend on >> >> In the 12 years we have been at this qth we found that our town's locally >> run power company has been very reliable but this experience showed me >> that >> it is not a bad idea to check your line voltage every once in a while. >> 73 >> >> -- Dave Robertson KD1NA >> > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: Items you think you can depend on
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In reply to this post by Elecraft mailing list
We had the power company lose the neutral connection in the
service to our house in New Hampshire. This meant that the 110 equipment on one side of the power system was acting as the return for the 110 equipment on the other side. When my cousin started using a big shop vac, the power strip on the other side of the line started smoking as the surge suppressors tried to handle the overvoltage situation. It didn't help that he has always been taught that electricity is dangerous and you should unplug all appliances, including clocks, whenever you leave the house for any amount of time. Now he unplugs the religiously. 73 Bill AE6JV On 9/4/17 at 10:32 AM, [hidden email] (Mel Farrer via Elecraft) wrote: >Funny you posted this. >I monitor BOTH sides of the 110/220 VAC service and have alarms set to trigger either line >125 or >>250 VAC. Being in the country THINGS happen. >Always expect the unusual. >Mel, K6KBE > > >From: David Robertson <[hidden email]> >To: Elecraft <[hidden email]> Sent: Monday, September >4, 2017 9:39 AM >Subject: [Elecraft] Items you think you can depend on > >Everyone, > >Over time we can grow complacent on many service items such as electrical >power, water and other services over time. Well that can be concerning as >many hidden changes can result in damage to your home and equipment. > >Late late night I came in to my den and was closing down my ham station >when I notice my fault light on my KPA500 linear was on. I powered it down >and retired for the evening. This morning I powered up the linear (KPA500) >and at once I got a fault light and had a high voltage alert. I powered >down the linear and checked my input line voltage. It was 137 volts RMS! To >be sure it wasn't my imagination I rechecked the voltage with a different >meter with the same result. In checking the 220 volt outlet I measured 274 >volts! My linear is set up for 220 volts operation and it was getting over >90 volts HV. > >I alerted the neighbors and cut the main breaker to the house. I then >called the power company's service number and reported the problem. A short >time later they called me back and reported that a regulator in the local >sub station had "Stuck" and was reset. In rechecking my line voltage it was >118 volts on the low side and 236 volts on the high side. > >In the 12 years we have been at this qth we found that our town's locally >run power company has been very reliable but this experience showed me that >it is not a bad idea to check your line voltage every once in a while. >73 > Bill Frantz | The first thing you need when | Periwinkle (408)356-8506 | using a perimeter defense is a | 16345 Englewood Ave www.pwpconsult.com | perimeter. | Los Gatos, CA 95032 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: Items you think you can depend on
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In reply to this post by Elecraft mailing list
A line voltage monitor/alarm a very good idea. Am surprised Dave's KPA500 power transformer core was not humming away at 60hz over excitation before he got it off line?Being retired from a large electric utility substation department, I know LTC (load tap changer) controls can sometimes fail. For those on a very rural line it could be an overheadline regulator gone to max steps boost (HV) or buck for low voltage. Usually these are single phase large auto-transformers with a plus or minus 10% in 16 steps each side of neutral position. 73
Mike AC5P On Monday, September 4, 2017 12:33 PM, Mel Farrer via Elecraft <[hidden email]> wrote: Funny you posted this. I monitor BOTH sides of the 110/220 VAC service and have alarms set to trigger either line >125 or >250 VAC. Being in the country THINGS happen. Always expect the unusual. Mel, K6KBE From: David Robertson <[hidden email]> To: Elecraft <[hidden email]> Sent: Monday, September 4, 2017 9:39 AM Subject: [Elecraft] Items you think you can depend on Everyone, Over time we can grow complacent on many service items such as electrical power, water and other services over time. Well that can be concerning as many hidden changes can result in damage to your home and equipment. Late late night I came in to my den and was closing down my ham station when I notice my fault light on my KPA500 linear was on. I powered it down and retired for the evening. This morning I powered up the linear (KPA500) and at once I got a fault light and had a high voltage alert. I powered down the linear and checked my input line voltage. It was 137 volts RMS! To be sure it wasn't my imagination I rechecked the voltage with a different meter with the same result. In checking the 220 volt outlet I measured 274 volts! My linear is set up for 220 volts operation and it was getting over 90 volts HV. I alerted the neighbors and cut the main breaker to the house. I then called the power company's service number and reported the problem. A short time later they called me back and reported that a regulator in the local sub station had "Stuck" and was reset. In rechecking my line voltage it was 118 volts on the low side and 236 volts on the high side. In the 12 years we have been at this qth we found that our town's locally run power company has been very reliable but this experience showed me that it is not a bad idea to check your line voltage every once in a while. 73 -- Dave Robertson KD1NA ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: Items you think you can depend on
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220 VAC in the US it typically 240 volts or more. I recommend a Buck Boost Transformer to reduce your voltage to 220. I use Temco model FT2004 from Tower Electric Motor Company, Fremont, CA 94538, tel 510-490-2187, www.phaseconverter.com. Haven't had a problem since I installed it ten years ago.
Bert N8NN -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of Mike Maloney Sent: Monday, September 4, 2017 5:39 PM To: Mel Farrer <[hidden email]>; David Robertson <[hidden email]>; Elecraft <[hidden email]> Subject: Re: [Elecraft] Items you think you can depend on A line voltage monitor/alarm a very good idea. Am surprised Dave's KPA500 power transformer core was not humming away at 60hz over excitation before he got it off line?Being retired from a large electric utility substation department, I know LTC (load tap changer) controls can sometimes fail. For those on a very rural line it could be an overheadline regulator gone to max steps boost (HV) or buck for low voltage. Usually these are single phase large auto-transformers with a plus or minus 10% in 16 steps each side of neutral position. 73 Mike AC5P On Monday, September 4, 2017 12:33 PM, Mel Farrer via Elecraft <[hidden email]> wrote: Funny you posted this. I monitor BOTH sides of the 110/220 VAC service and have alarms set to trigger either line >125 or >250 VAC. Being in the country THINGS happen. Always expect the unusual. Mel, K6KBE From: David Robertson <[hidden email]> To: Elecraft <[hidden email]> Sent: Monday, September 4, 2017 9:39 AM Subject: [Elecraft] Items you think you can depend on Everyone, Over time we can grow complacent on many service items such as electrical power, water and other services over time. Well that can be concerning as many hidden changes can result in damage to your home and equipment. Late late night I came in to my den and was closing down my ham station when I notice my fault light on my KPA500 linear was on. I powered it down and retired for the evening. This morning I powered up the linear (KPA500) and at once I got a fault light and had a high voltage alert. I powered down the linear and checked my input line voltage. It was 137 volts RMS! To be sure it wasn't my imagination I rechecked the voltage with a different meter with the same result. In checking the 220 volt outlet I measured 274 volts! My linear is set up for 220 volts operation and it was getting over 90 volts HV. I alerted the neighbors and cut the main breaker to the house. I then called the power company's service number and reported the problem. A short time later they called me back and reported that a regulator in the local sub station had "Stuck" and was reset. In rechecking my line voltage it was 118 volts on the low side and 236 volts on the high side. In the 12 years we have been at this qth we found that our town's locally run power company has been very reliable but this experience showed me that it is not a bad idea to check your line voltage every once in a while. 73 -- Dave Robertson KD1NA ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Bob Steding
I once read an article where a group was threatening to serial number
each electrons-- no wait, that was reloading... Never mind! 73s and thanks, Dave NK7Z http://www.nk7z.net On 09/04/2017 01:26 PM, Bob Steding wrote: > *This means that an electric company can sell a customer the same batch of > electricity thousands of times a day and never get caught, since very few > customers take the time to examine their electricity closely. In fact, the > last year any new electricity was generated was 1937.* > > On Mon, Sep 4, 2017 at 2:04 PM, Fred Jensen <[hidden email]> wrote: > >> Yes indeed! For many years, unscrupulous electric power companies have >> been capitalizing on the fact that they send electrons to our house and >> charge us for them, we toast the bread with them, and then ... get this ... >> the electrons we paid for go back to the power company!! They get away >> with this because none of us ever inspect our electricity closely. >> >> 73, >> >> Fred ["Skip"] K6DGW >> Sparks NV DM09dn >> Washoe County >> >>> From: David Robertson<[hidden email]> >>> To: Elecraft<[hidden email]> Sent: Monday, September 4, >>> 2017 9:39 AM >>> Subject: [Elecraft] Items you think you can depend on >>> >>> In the 12 years we have been at this qth we found that our town's locally >>> run power company has been very reliable but this experience showed me >>> that >>> it is not a bad idea to check your line voltage every once in a while. >>> 73 >>> >>> -- Dave Robertson KD1NA >>> >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to [hidden email] > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: Items you think you can depend on
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In reply to this post by Bert Garcia N8NN
On 9/4/2017 2:57 PM, Bert Garcia N8NN wrote:
> 220 VAC in the US it typically 240 volts or more. For several decades, 120/240 VAC became the Standard for single-phase distribution in North America. Those of us who call call it "110" are showing our age. :) 73, Jim K9YC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: Items you think you can depend on
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I was at the Shelby, NC hamfest this weekend, and we had the KPA1500 for
the Elecraft booth. I caught myself several times referring to the line voltage required as 220 even though I know better. My age is showing. But I do know that if one is operating the KPA1500 in a commercial building with 3 phase service, the voltage is 120/208. The KPA1500 power supply is a switcher, and most switchers can tolerate a wide variation in input AC voltage. 73, Don W3FPR On 9/4/2017 6:29 PM, Jim Brown wrote: > On 9/4/2017 2:57 PM, Bert Garcia N8NN wrote: >> 220 VAC in the US it typically 240 volts or more. > > For several decades, 120/240 VAC became the Standard for single-phase > distribution in North America. Those of us who call call it "110" are > showing our age. :) ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: Items you think you can depend on
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On 9/4/2017 3:40 PM, Don Wilhelm wrote:
> But I do know that if one is operating the KPA1500 in a commercial > building with 3 phase service, the voltage is 120/208. Not always. In much of the US, power is distributed as "high-leg Delta" (sometimes called "wild leg). Three-phase customers get 240V Delta, single phase customers get 120-240 from a center-tapped transformer fed by one of the sides of the Delta. Neutral is established by the center tap. This configuration is widely used in cities, and is what serves me in the Santa Cruz Mountains. > The KPA1500 power supply is a switcher, and most switchers can > tolerate a wide variation in input AC voltage. And the KPA500 power transformer can be tapped for a fairly wide range of supply voltages. 73, Jim K9YC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: Items you think you can depend on
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In reply to this post by Jim Brown-10
On 9/4/2017 3:29 PM, Jim Brown wrote:
> For several decades, 120/240 VAC became the Standard for single-phase > distribution in North America. Those of us who call call it "110" are > showing our age. :) And how many sources refer to it as "115 V" or worse "117 V". That raises the (on topic) question of what is the acceptable excursion/tolerance standard for equipment designed to run on "12 V DC" in light of the LiFePO4 battery discussion here recently. 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 From a Clearing in the Silicon Forest Beaverton (Washington County) Oregon ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: Items you think you can depend on
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I can answer that one. It is in the equipment manuals. 15V max.
Some components are rated at that level. You really don’t want to go too high or you lose a lot of power dissipated in linear voltage regulators inside the equipment. Of course too low and the transmitters can have issues. Things like the KRC2, W2 and other peripherals should be able to work pretty well las low as 8 or 9 volts, but they are most happy at the same level as the transceivers. - Jack, W6FB > On Sep 4, 2017, at 4:31 PM, Phil Kane <[hidden email]> wrote: > > On 9/4/2017 3:29 PM, Jim Brown wrote: > >> For several decades, 120/240 VAC became the Standard for single-phase >> distribution in North America. Those of us who call call it "110" are >> showing our age. :) > > And how many sources refer to it as "115 V" or worse "117 V". > > That raises the (on topic) question of what is the acceptable > excursion/tolerance standard for equipment designed to run on "12 V DC" > in light of the LiFePO4 battery discussion here recently. > > 73 de K2ASP - Phil Kane > Elecraft K2/100 s/n 5402 > > From a Clearing in the Silicon Forest > Beaverton (Washington County) Oregon > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: Items you think you can depend on
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On 9/4/2017 4:49 PM, Jack Brindle wrote:
> I can answer that one. It is in the equipment manuals. 15V max. > Some components are rated at that level. That is true for Elecraft equipment but I was referring to "generic" 12V stuff. For example, some "12 V" things that I use are external disk drives, powered USB hubs, radio accessories, and computer peripherals of all sorts. Some manuals list this, sometimes we are lucky just to get an instruction sheet with pictures let alone text. So far I've been satisfied with my power board set for a "regulated" level of 14.1 V for transceivers and "float" level (nominally 13.8 V) for everything else -- but I was wondering. Maybe it's my power engineer training !! 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 From a Clearing in the Silicon Forest Beaverton (Washington County) Oregon ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Don Wilhelm
Even the NEC (US National Electrical Code) is inconsistent. There are references to 120/240, 125/250, etc. Even 125v, 115v. Don't recall seeing 110v lately but it is a thick book and some sections rarely change.
73, Jim AB4AC Jim Finan Sunny South Florida. Original Message From: [hidden email] Sent: September 4, 2017 6:41 PM To: [hidden email] Reply-to: [hidden email] Subject: Re: [Elecraft] Items you think you can depend on I was at the Shelby, NC hamfest this weekend, and we had the KPA1500 for the Elecraft booth. I caught myself several times referring to the line voltage required as 220 even though I know better. My age is showing. But I do know that if one is operating the KPA1500 in a commercial building with 3 phase service, the voltage is 120/208. The KPA1500 power supply is a switcher, and most switchers can tolerate a wide variation in input AC voltage. 73, Don W3FPR On 9/4/2017 6:29 PM, Jim Brown wrote: > On 9/4/2017 2:57 PM, Bert Garcia N8NN wrote: >> 220 VAC in the US it typically 240 volts or more. > > For several decades, 120/240 VAC became the Standard for single-phase > distribution in North America. Those of us who call call it "110" are > showing our age. :) ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: Items you think you can depend on
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In reply to this post by Jack Brindle-2
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> I can answer that one. It is in the equipment manuals. 15V max. > Some components are rated at that level. I hope you are saying that the derating for the components was based on a 15V max input. If there are 15V rated parts on the input rail, that's not good. 73 de AI6KG On Mon, Sep 4, 2017 at 4:49 PM, Jack Brindle <[hidden email]> wrote: > I can answer that one. It is in the equipment manuals. 15V max. > Some components are rated at that level. > > You really don’t want to go too high or you lose a lot of power dissipated > in linear voltage regulators inside the equipment. > Of course too low and the transmitters can have issues. Things like the > KRC2, W2 and other peripherals should be able to > work pretty well las low as 8 or 9 volts, but they are most happy at the > same level as the transceivers. > > - Jack, W6FB > > > > > On Sep 4, 2017, at 4:31 PM, Phil Kane <[hidden email]> wrote: > > > > On 9/4/2017 3:29 PM, Jim Brown wrote: > > > >> For several decades, 120/240 VAC became the Standard for single-phase > >> distribution in North America. Those of us who call call it "110" are > >> showing our age. :) > > > > And how many sources refer to it as "115 V" or worse "117 V". > > > > That raises the (on topic) question of what is the acceptable > > excursion/tolerance standard for equipment designed to run on "12 V DC" > > in light of the LiFePO4 battery discussion here recently. > > > > 73 de K2ASP - Phil Kane > > Elecraft K2/100 s/n 5402 > > > > From a Clearing in the Silicon Forest > > Beaverton (Washington County) Oregon > > ______________________________________________________________ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:[hidden email] > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to [hidden email] > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: Items you think you can depend on
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> I hope you are saying that the derating for the components was based on a > 15V max input. If there are 15V rated parts on the input rail, that's > not good. I just took a glance at the K3S schematics to see if I could tell. Result was inconclusive. Notes: C3 (10 uF), C8 (10 uF) and C22 (470 uF) on the PA I/O board have no voltage ratings specified on the drawings. C85 (10 uF) on the DSP power supply has no voltage rating on the drawing. C52 is 1000 uF / 10V on a regulated 8V rail. That wouldn't have gotten past the design reviews I have been subjected to. Most of the other caps on the 8V rail(s) are rated for 25V. All but the 10 uF parts are likely tants or electrolytics. 10 uF could be those or ceramic. C102 (10u, 10V) is ceramic and may be unsufficiently derated. (See the recent thread on the loss of LCD segments; known problem to Elecraft support.) Very few of the low value caps (which are all are probably MLCCs) have a voltage specified on the drawings. I probably missed something as It is hard to do schematic review with PDFs, but we're lucky to have those. Thank you, Elecraft! -ch On Mon, Sep 4, 2017 at 5:12 PM, Christopher Hoover <[hidden email]> wrote: > I can answer that one. It is in the equipment manuals. 15V max. >> Some components are rated at that level. > > > I hope you are saying that the derating for the components was based on a > 15V max input. If there are 15V rated parts on the input rail, that's > not good. > > 73 de AI6KG > > > > > On Mon, Sep 4, 2017 at 4:49 PM, Jack Brindle <[hidden email]> wrote: > >> I can answer that one. It is in the equipment manuals. 15V max. >> Some components are rated at that level. >> >> You really don’t want to go too high or you lose a lot of power >> dissipated in linear voltage regulators inside the equipment. >> Of course too low and the transmitters can have issues. Things like the >> KRC2, W2 and other peripherals should be able to >> work pretty well las low as 8 or 9 volts, but they are most happy at the >> same level as the transceivers. >> >> - Jack, W6FB >> >> >> >> > On Sep 4, 2017, at 4:31 PM, Phil Kane <[hidden email]> wrote: >> > >> > On 9/4/2017 3:29 PM, Jim Brown wrote: >> > >> >> For several decades, 120/240 VAC became the Standard for single-phase >> >> distribution in North America. Those of us who call call it "110" are >> >> showing our age. :) >> > >> > And how many sources refer to it as "115 V" or worse "117 V". >> > >> > That raises the (on topic) question of what is the acceptable >> > excursion/tolerance standard for equipment designed to run on "12 V DC" >> > in light of the LiFePO4 battery discussion here recently. >> > >> > 73 de K2ASP - Phil Kane >> > Elecraft K2/100 s/n 5402 >> > >> > From a Clearing in the Silicon Forest >> > Beaverton (Washington County) Oregon >> > ______________________________________________________________ >> > Elecraft mailing list >> > Home: http://mailman.qth.net/mailman/listinfo/elecraft >> > Help: http://mailman.qth.net/mmfaq.htm >> > Post: mailto:[hidden email] >> > >> > This list hosted by: http://www.qsl.net >> > Please help support this email list: http://www.qsl.net/donate.html >> > Message delivered to [hidden email] >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to [hidden email] >> > > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: Items you think you can depend on
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ch,
I believe you will find that Elecraft designs are conservative. To use a 15 volt rated capacitor on a 15 volt rail would be foolish. You will find those capacitors rated at 25 or 50 volts. 73, Don W3FPR On 9/4/2017 9:05 PM, Christopher Hoover wrote: >> >> I hope you are saying that the derating for the components was based on a >> 15V max input. If there are 15V rated parts on the input rail, that's >> not good. > > > I just took a glance at the K3S schematics to see if I could tell. Result > was inconclusive. > > Notes: > > > C3 (10 uF), C8 (10 uF) and C22 (470 uF) on the PA I/O board have no voltage > ratings specified on the drawings. > > C85 (10 uF) on the DSP power supply has no voltage rating on the drawing. > > C52 is 1000 uF / 10V on a regulated 8V rail. That wouldn't have gotten > past the design reviews I have been subjected to. Most of the other caps > on the 8V rail(s) are rated for 25V. > > All but the 10 uF parts are likely tants or electrolytics. 10 uF could be > those or ceramic. > > C102 (10u, 10V) is ceramic and may be unsufficiently derated. (See the > recent thread on the loss of LCD segments; known problem to Elecraft > support.) > > Very few of the low value caps (which are all are probably MLCCs) have a > voltage specified on the drawings. > > > I probably missed something as It is hard to do schematic review with > PDFs, but we're lucky to have those. Thank you, Elecraft! > > -ch > > > > On Mon, Sep 4, 2017 at 5:12 PM, Christopher Hoover <[hidden email]> > wrote: > >> I can answer that one. It is in the equipment manuals. 15V max. >>> Some components are rated at that level. >> >> >> I hope you are saying that the derating for the components was based on a >> 15V max input. If there are 15V rated parts on the input rail, that's >> not good. >> >> 73 de AI6KG >> >> >> >> >> On Mon, Sep 4, 2017 at 4:49 PM, Jack Brindle <[hidden email]> wrote: >> >>> I can answer that one. It is in the equipment manuals. 15V max. >>> Some components are rated at that level. >>> >>> You really don’t want to go too high or you lose a lot of power >>> dissipated in linear voltage regulators inside the equipment. >>> Of course too low and the transmitters can have issues. Things like the >>> KRC2, W2 and other peripherals should be able to >>> work pretty well las low as 8 or 9 volts, but they are most happy at the >>> same level as the transceivers. >>> >>> - Jack, W6FB >>> >>> >>> >>>> On Sep 4, 2017, at 4:31 PM, Phil Kane <[hidden email]> wrote: >>>> >>>> On 9/4/2017 3:29 PM, Jim Brown wrote: >>>> >>>>> For several decades, 120/240 VAC became the Standard for single-phase >>>>> distribution in North America. Those of us who call call it "110" are >>>>> showing our age. :) >>>> >>>> And how many sources refer to it as "115 V" or worse "117 V". >>>> >>>> That raises the (on topic) question of what is the acceptable >>>> excursion/tolerance standard for equipment designed to run on "12 V DC" >>>> in light of the LiFePO4 battery discussion here recently. >>>> >>>> 73 de K2ASP - Phil Kane >>>> Elecraft K2/100 s/n 5402 >>>> >>>> From a Clearing in the Silicon Forest >>>> Beaverton (Washington County) Oregon >>>> ______________________________________________________________ >>>> Elecraft mailing list >>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>>> Help: http://mailman.qth.net/mmfaq.htm >>>> Post: mailto:[hidden email] >>>> >>>> This list hosted by: http://www.qsl.net >>>> Please help support this email list: http://www.qsl.net/donate.html >>>> Message delivered to [hidden email] >>> >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[hidden email] >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >>> Message delivered to [hidden email] >>> >> >> > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Items you think you can depend on
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In reply to this post by Dave KD1NA
OK, I have to ask this question seriously even though this thread has become a spoof.
Is it really the same electrons that flow from the municipal generator to our rigs and then back to the powerhouse again? I would have guessed that any individual electron motivated by an applied voltage would simply have moved an atomic diameter or two to fill in a spot in an adjacent depleted valence shell, such that a current flow is actually a shuffling of electrons from one positive ion to the next, but that individual electrons really don’t move very far. And then they all shuffle back the other way every one sixtieth of a second. Sort of like cars on Route 128 around Boston, as I recall from my days there. On the other hand, maybe the uncertainties in the quantum wave function preclude our ever knowing an electron’s position anyway, in which case the question is moot, right? For those who care to respond, be kind. I am a lawyer, not a physicist. I will return the graciousness if anyone has a question about the mediaeval origins of the writ of coram nobis. Off-line, of course. Ted, KN1CBR On 09/04/2017 01:26 PM, Bob Steding wrote: *This means that an electric company can sell a customer the same batch of electricity thousands of times a day and never get caught, since very few customers take the time to examine their electricity closely. In fact, the last year any new electricity was generated was 1937.* On Mon, Sep 4, 2017 at 2:04 PM, Fred Jensen <[hidden email]<mailto:[hidden email]>> wrote: Yes indeed! For many years, unscrupulous electric power companies have been capitalizing on the fact that they send electrons to our house and charge us for them, we toast the bread with them, and then ... get this ... the electrons we paid for go back to the power company!! They get away with this because none of us ever inspect our electricity closely. 73, Fred ["Skip"] K6DGW Sparks NV DM09dn Washoe County ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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