K3-Front panel shut down question.
Locked
12
12
 
|
My K2 is set up with a power supply to the 100w connection and a battery to the low power connection,
If commercial power cuts off without warning(and it does sometimes)the K2 stays on with battery power. I am looking for a way to do this with my K3 so I can at least shut down from the front panel when this happens. I understand the K3 don't like it when shutdown other than the front panel. Maybe a battery between the power suppley and the K3?(or is there a better way). |
Re: K3-Front panel shut down question.
|
|
Plug your K3 into a decent UPS.
Gary W2CS >-----Original Message----- >From: [hidden email] [mailto:elecraft- >[hidden email]] On Behalf Of kf4clo >Sent: Wednesday, August 17, 2011 6:12 PM >To: [hidden email] >Subject: [Elecraft] K3-Front panel shut down question. > > My K2 is set up with a power supply to the 100w connection and a >battery to >the low power connection, >If commercial power cuts off without warning(and it does sometimes)the >K2 >stays on with battery power. >I am looking for a way to do this with my K3 so I can at least shut down >from the front panel when this happens. I understand the K3 don't like >it >when shutdown other than the front panel. Maybe a battery between the >power >suppley and the K3?(or is there a better way). > >-- >View this message in context: http://elecraft.365791.n2.nabble.com/K3- >Front-panel-shut-down-question-tp6697413p6697413.html >Sent from the Elecraft mailing list archive at Nabble.com. >______________________________________________________________ >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 ______________________________________________________________ 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 |
Re: K3-Front panel shut down question.
|
|
In reply to this post by kf4clo
You could connect a battery and a power supply to the K3 power input, if you put a diode
in series with the battery and one in series with the power supply. The cathodes of the diodes would go toward the K3. Then as long as the voltage of the PS was greater than that from the battery, the power would come from the PS. If the PS went off it would come from the battery. The diodes would prevent any current from flowing between the PS and the battery. Of course a UPS is an idea, but many UPS' generate a lot of radio noise. After all, they contain inverters, which are switching devices. On 8/17/2011 3:12 PM, kf4clo wrote: > My K2 is set up with a power supply to the 100w connection and a battery to > the low power connection, > If commercial power cuts off without warning(and it does sometimes)the K2 > stays on with battery power. > I am looking for a way to do this with my K3 so I can at least shut down > from the front panel when this happens. I understand the K3 don't like it > when shutdown other than the front panel. Maybe a battery between the power > suppley and the K3?(or is there a better way). -- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ ______________________________________________________________ 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 |
Re: K3-Front panel shut down question.
|
|
Vic, what you are describing is called a diode 'OR' gate. That works well
with logic but it has some problems with power. If the diode is not ideal it will drop voltage across the diode. That can amount to considerable power loss and destroy the diode if you are not carful. That's why you see such devices sold on heat sinks (called battery isolators). A better solution if you can set the power supply to the float voltage of the battery, then float the battery across the power connection to the K3. This has a bonus that the battery acts as a filter. Remember the power supply voltage must match the battery float voltage which is around 13.85v +/- 50 mv. 73 de Fred, AE6QL -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of Vic K2VCO Sent: Wednesday, August 17, 2011 5:12 PM To: [hidden email] Subject: Re: [Elecraft] K3-Front panel shut down question. You could connect a battery and a power supply to the K3 power input, if you put a diode in series with the battery and one in series with the power supply. The cathodes of the diodes would go toward the K3. Then as long as the voltage of the PS was greater than that from the battery, the power would come from the PS. If the PS went off it would come from the battery. The diodes would prevent any current from flowing between the PS and the battery. Of course a UPS is an idea, but many UPS' generate a lot of radio noise. After all, they contain inverters, which are switching devices. On 8/17/2011 3:12 PM, kf4clo wrote: > My K2 is set up with a power supply to the 100w connection and a > battery to the low power connection, If commercial power cuts off > without warning(and it does sometimes)the K2 stays on with battery > power. > I am looking for a way to do this with my K3 so I can at least shut > down from the front panel when this happens. I understand the K3 don't > like it when shutdown other than the front panel. Maybe a battery > between the power suppley and the K3?(or is there a better way). -- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ ______________________________________________________________ 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 ______________________________________________________________ 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 |
Re: K3-Front panel shut down question.
|
|
There will be about 0.6v drop across each diode. That won't be a problem for the power
supply. It will reduce the amount of time the battery will operate the K3 a bit, but the K3 will work down to a pretty low voltage to start with. Obviously the diodes have to be rated properly and heatsinked if necessary. Float-charging the battery is nice, but you have to be very careful. Too much voltage can destroy the battery, too little will shorten its life. There is also the problem of producing hydrogen if it's not a sealed battery, etc. I just wanted to provide the simplest solution possible for the original poster's question. On 8/17/2011 6:17 PM, Fred Townsend wrote: > Vic, what you are describing is called a diode 'OR' gate. That works well > with logic but it has some problems with power. If the diode is not ideal it > will drop voltage across the diode. That can amount to considerable power > loss and destroy the diode if you are not carful. That's why you see such > devices sold on heat sinks (called battery isolators). A better solution if > you can set the power supply to the float voltage of the battery, then float > the battery across the power connection to the K3. This has a bonus that the > battery acts as a filter. > Remember the power supply voltage must match the battery float voltage which > is around 13.85v +/- 50 mv. > > 73 > de Fred, AE6QL > > -----Original Message----- > From: [hidden email] > [mailto:[hidden email]] On Behalf Of Vic K2VCO > Sent: Wednesday, August 17, 2011 5:12 PM > To: [hidden email] > Subject: Re: [Elecraft] K3-Front panel shut down question. > > You could connect a battery and a power supply to the K3 power input, if you > put a diode in series with the battery and one in series with the power > supply. The cathodes of the diodes would go toward the K3. Then as long as > the voltage of the PS was greater than that from the battery, the power > would come from the PS. If the PS went off it would come from the battery. > The diodes would prevent any current from flowing between the PS and the > battery. > > Of course a UPS is an idea, but many UPS' generate a lot of radio noise. > After all, they contain inverters, which are switching devices. > > On 8/17/2011 3:12 PM, kf4clo wrote: >> My K2 is set up with a power supply to the 100w connection and a >> battery to the low power connection, If commercial power cuts off >> without warning(and it does sometimes)the K2 stays on with battery >> power. >> I am looking for a way to do this with my K3 so I can at least shut >> down from the front panel when this happens. I understand the K3 don't >> like it when shutdown other than the front panel. Maybe a battery >> between the power suppley and the K3?(or is there a better way). > > -- > Vic, K2VCO > Fresno CA > http://www.qsl.net/k2vco/ > ______________________________________________________________ > 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 > -- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ ______________________________________________________________ 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 |
Re: K3-Front panel shut down question.
|
In reply to this post by kf4clo
CONTENTS DELETED
The author has deleted this message.
|
Re: K3-Front panel shut down question.
|
|
In reply to this post by Vic Rosenthal
Perhaps the simplest solution is to just not worry about it? Whilst
yanking the power supply while the K3 is running is not recommended, the chances of an unexpected power outage actually doing any harm are fairly minimal, AFAIK. Keep a copy of your configuration (using the K3 Utility) so you can reload it in a worst-case scenario... and be happy... 73, ~iain / N6ML On Thu, Aug 18, 2011 at 2:20 AM, Vic K2VCO <[hidden email]> wrote: > There will be about 0.6v drop across each diode. That won't be a problem for the power > supply. It will reduce the amount of time the battery will operate the K3 a bit, but the > K3 will work down to a pretty low voltage to start with. > > Obviously the diodes have to be rated properly and heatsinked if necessary. > > Float-charging the battery is nice, but you have to be very careful. Too much voltage can > destroy the battery, too little will shorten its life. There is also the problem of > producing hydrogen if it's not a sealed battery, etc. > > I just wanted to provide the simplest solution possible for the original poster's question. > > On 8/17/2011 6:17 PM, Fred Townsend wrote: >> Vic, what you are describing is called a diode 'OR' gate. That works well >> with logic but it has some problems with power. If the diode is not ideal it >> will drop voltage across the diode. That can amount to considerable power >> loss and destroy the diode if you are not carful. That's why you see such >> devices sold on heat sinks (called battery isolators). A better solution if >> you can set the power supply to the float voltage of the battery, then float >> the battery across the power connection to the K3. This has a bonus that the >> battery acts as a filter. >> Remember the power supply voltage must match the battery float voltage which >> is around 13.85v +/- 50 mv. >> >> 73 >> de Fred, AE6QL >> >> -----Original Message----- >> From: [hidden email] >> [mailto:[hidden email]] On Behalf Of Vic K2VCO >> Sent: Wednesday, August 17, 2011 5:12 PM >> To: [hidden email] >> Subject: Re: [Elecraft] K3-Front panel shut down question. >> >> You could connect a battery and a power supply to the K3 power input, if you >> put a diode in series with the battery and one in series with the power >> supply. The cathodes of the diodes would go toward the K3. Then as long as >> the voltage of the PS was greater than that from the battery, the power >> would come from the PS. If the PS went off it would come from the battery. >> The diodes would prevent any current from flowing between the PS and the >> battery. >> >> Of course a UPS is an idea, but many UPS' generate a lot of radio noise. >> After all, they contain inverters, which are switching devices. >> >> On 8/17/2011 3:12 PM, kf4clo wrote: >>> Â Â My K2 is set up with a power supply to the 100w connection and a >>> battery to the low power connection, If commercial power cuts off >>> without warning(and it does sometimes)the K2 stays on with battery >>> power. >>> I am looking for a way to do this with my K3 so I can at least shut >>> down from the front panel when this happens. I understand the K3 don't >>> like it when shutdown other than the front panel. Maybe a battery >>> between the power suppley and the K3?(or is there a better way). >> >> -- >> Vic, K2VCO >> Fresno CA >> http://www.qsl.net/k2vco/ >> ______________________________________________________________ >> 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 >> > > -- > Vic, K2VCO > Fresno CA > http://www.qsl.net/k2vco/ > ______________________________________________________________ > 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 > 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 |
|
|
In reply to this post by kf4clo
No problem to shutdown K3 from the PS during normal operation, except that
the last used frequency and controls wouldn't be memorized. No chance for any hardware or software trouble. The UPS or battery only would allow you to finish off the QSO, no other benefits. Even the interruption during FW update is not deadly for K3. (At least for SN 516, switched off only by the PS since March 2008) 73 Val LZ1VB > > I understand the K3 don't like it when shutdown other than the front > panel. Maybe a battery between the power > suppley and the K3?(or is there a better way). > ______________________________________________________________ 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 |
Re: K3-Front panel shut down question.
|
|
I would not have thought that this is recommended, Val. The K3 is a
'computer'. Do you also switch your computer off at the supply without closing Windows down? 73 de David G4DMP In a recent message, Val <[hidden email]> writes > >No problem to shutdown K3 from the PS during normal operation, except that >the last used frequency and controls wouldn't be memorized. No chance for >any hardware or software trouble. The UPS or battery only would allow you to >finish off the QSO, no other benefits. Even the interruption during FW >update is not deadly for K3. (At least for SN 516, switched off only by the >PS since March 2008) -- + - - - - - - - - - - - - - - - - + | David M Pratt, Kippax, Leeds. | | Website: http://www.g4dmp.co.uk | + - - - - - - - - - - - - - - - - + ______________________________________________________________ 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 |
|
|
David,
I would switch my computer off at the supply only if it, the OS and the other software were designed in such way, that the hard switch off wouldn't cause any harm. We all know that this is not the case with the PC and Windows. K3 however is different. Most of the modern house appliances also have embedded computers and they usually don't fear of a PS interruption too. 73 Val LZ1VB >I would not have thought that this is recommended, Val. The K3 is a > 'computer'. Do you also switch your computer off at the supply without > closing Windows down? > > 73 de David G4DMP > > In a recent message, Val <[hidden email]> writes >> >>No problem to shutdown K3 from the PS during normal operation, except that >>the last used frequency and controls wouldn't be memorized. No chance for >>any hardware or software trouble. The UPS or battery only would allow you >>to >>finish off the QSO, no other benefits. Even the interruption during FW >>update is not deadly for K3. (At least for SN 516, switched off only by >>the >>PS since March 2008) > -- > + - - - - - - - - - - - - - - - - + > | David M Pratt, Kippax, Leeds. | > | Website: http://www.g4dmp.co.uk | > + - - - - - - - - - - - - - - - - + > > > ______________________________________________________________ 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 |
|
|
CONTENTS DELETED
The author has deleted this message.
|
Re: K3-Front panel shut down question.
|
|
In reply to this post by kf4clo
But first, before plugging the K3 DC supply into any UPS,
make sure the UPS has true "Sine Wave" output and is not "Pseudo Sine Wave" when on battery power (or when creating AC from its built in voltage converter circuitry). Your 12v supply's capacitors may clean up a lot of the hash and harmonics created by Pseudo Sine Wave UPS's, then again, they may not. Just a thought... Your milage may vary. -lu-w4lt- K3 # 3192/P3 # 1301 --------------------- Message: 11 Date: Wed, 17 Aug 2011 18:14:49 -0400 From: "Gary Ferdinand" <[hidden email]> Subject: Re: [Elecraft] K3-Front panel shut down question. To: <[hidden email]> Message-ID: <004c01cc5d2b$148af650$3da0e2f0$@net> Content-Type: text/plain; charset="US-ASCII" Plug your K3 into a decent UPS. Gary W2CS ______________________________________________________________ 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 |
|
|
In reply to this post by AC7AC
I'll repeat W2CS suggestion, get a UPS, then plug the K3's power supply into
the UPS. Since you are trying only to allow yourself to shut down cleanly, you can get the smallest capacity, and therefore the cheapest version. It will handle the K3's RX current for quite a while, even with a small UPS. Some of the commentary seems to be about creating a full run floating battery alternate supply. If you want that, it's one approach, but if all you want is orderly shut down, you hardly need go that far. If you already have a UPS for your PC, plug the K3's power supply into that UPS. When you are operating with AC the extra drain makes no difference to the UPS. When the power goes down, cease transmitting quickly and you will be fine. The K3 in RX only adds about 20 watts to the load on the AC. 73, Guy. On Thu, Aug 18, 2011 at 10:36 AM, Ron D'Eau Claire <[hidden email]> wrote: > The danger with the K3 seems to be if power is removed while it's actively > writing new data to memory. Early in the K3 program several people who > switched power off at the supply quickly reported finding the firmware > "corrupted" in various ways upon restoring power because of that. > > Certainly no physical damage was done, but it is rather inconvenient to > reload all the firmware. > > 73, > > Ron AC7AC > > ______________________________________________________________ > 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 > 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 |
Re: K3-Front panel shut down question.
|
|
Someone also mentioned that the UPS might generate some hash - BUT that
would only be true if the AC is removed from the UPS. Under normal conditions with AC present, the inverter is not active. It was not the initial question, but -- if you want to keep transmitting after an outage, you will have to implement the large battery solutions that have been mentioned. 73, Don W3FPR On 8/18/2011 2:22 PM, Guy Olinger K2AV wrote: > I'll repeat W2CS suggestion, get a UPS, then plug the K3's power supply into > the UPS. Since you are trying only to allow yourself to shut down cleanly, > you can get the smallest capacity, and therefore the cheapest version. It > will handle the K3's RX current for quite a while, even with a small UPS. > > Some of the commentary seems to be about creating a full run floating > battery alternate supply. If you want that, it's one approach, but if all > you want is orderly shut down, you hardly need go that far. > > If you already have a UPS for your PC, plug the K3's power supply into that > UPS. When you are operating with AC the extra drain makes no difference to > the UPS. When the power goes down, cease transmitting quickly and you will > be fine. The K3 in RX only adds about 20 watts to the load on the AC. > > 73, Guy. > > On Thu, Aug 18, 2011 at 10:36 AM, Ron D'Eau Claire<[hidden email]> wrote: > >> The danger with the K3 seems to be if power is removed while it's actively >> writing new data to memory. Early in the K3 program several people who >> switched power off at the supply quickly reported finding the firmware >> "corrupted" in various ways upon restoring power because of that. >> >> Certainly no physical damage was done, but it is rather inconvenient to >> reload all the firmware. >> >> 73, >> >> Ron AC7AC >> >> ______________________________________________________________ >> 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 >> > ______________________________________________________________ > 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 > 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 |
Re: K3-Front panel shut down question.
|
|
>>>>> "Don" == Don Wilhelm <[hidden email]> writes:
Don> Someone also mentioned that the UPS might generate some hash - BUT that Don> would only be true if the AC is removed from the UPS. Under normal Don> conditions with AC present, the inverter is not active. Watch out for UPSes that have a line boost function, those generate hash even when AC is present if the mains are below a certain (usually settable) treshold. For example mine was set to boost when input was below 208 V. Pf -- Pierfrancesco Caci, ik5pvx ______________________________________________________________ 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 |
|
|
In reply to this post by Don Wilhelm-4
I am using a Tripp-Lite G1000U and haven't noticed any noise. It's
described at http://www.tripplite.com/en/products/Specialty-Products.cfm?MDLID=4164 and http://www.stratagemtech.com/media/pro090304ups.htm . As Guy says, when the AC power is being supplied the UPS just passes it, though it does have automatic voltage regulation. I got it at Costco for about $100, and they are now carrying a new model. http://tinyurl.com/3utbrcd I have an Astron RS-35M for the K3, an Astron SS-12 (switching, though seems to be quiet) for 2M and 450 radios, and a SteppIR controller plugged in it. Jim N7US -----Original Message----- Someone also mentioned that the UPS might generate some hash - BUT that would only be true if the AC is removed from the UPS. Under normal conditions with AC present, the inverter is not active. Don W3FPR On 8/18/2011 2:22 PM, Guy Olinger K2AV wrote: > I'll repeat W2CS suggestion, get a UPS, then plug the K3's power supply into > the UPS. Since you are trying only to allow yourself to shut down cleanly, > you can get the smallest capacity, and therefore the cheapest version. It > will handle the K3's RX current for quite a while, even with a small UPS. > > Some of the commentary seems to be about creating a full run floating > battery alternate supply. If you want that, it's one approach, but if all > you want is orderly shut down, you hardly need go that far. > > If you already have a UPS for your PC, plug the K3's power supply into that > UPS. When you are operating with AC the extra drain makes no difference to > the UPS. When the power goes down, cease transmitting quickly and you will > be fine. The K3 in RX only adds about 20 watts to the load on the AC. > > 73, Guy. > > On Thu, Aug 18, 2011 at 10:36 AM, Ron D'Eau Claire<[hidden email]> wrote: > >> The danger with the K3 seems to be if power is removed while it's actively >> writing new data to memory. Early in the K3 program several people who >> switched power off at the supply quickly reported finding the firmware >> "corrupted" in various ways upon restoring power because of that. >> >> Certainly no physical damage was done, but it is rather inconvenient to >> reload all the firmware. >> Ron AC7AC ______________________________________________________________ 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 |
Re: K3-Front panel shut down question.
|
|
In reply to this post by Guy, K2AV
On 8/18/2011 11:22 AM, Guy Olinger K2AV wrote:
> Some of the commentary seems to be about creating a full run floating > battery alternate supply. If you want that, it's one approach, but if all > you want is orderly shut down, you hardly need go that far. Actually, this is quite easy and inexpensive to do. I use one of the biggest 12V batteries that Costco sells (about $75) and float charge it with a little 10A switching power supply that I bought for $10 at a hamfest. I've adjusted the float voltage to 14V, and the battery lasts for at least 3 years. The key is to carefully set the float voltage so that it doesn't overcharge the battery. 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 |
|
|
In reply to this post by Don Wilhelm-4
Not necessarily true -- I had an APC UPS that created continuous
60Hz-flavored hash on all ham bands (at least up to 21 MHz), S6-S7 level, whether commercial power was present or not. I wrote to APC and they said their equipment met FCC regulations with regard to spurious emissions, and very kindly sent me a deluxe noise-and-surge suppression outlet strip. It made no impression whatsoever on the noise, nor did one clamp-on ferrite bead (all I had that would fit the cord at the time) on the AC supply cord next to the unit make any difference. Perhaps if I had had enough beads to put a couple on every cord plugged into the UPS as well, it would have helped. I just got a Tripp Lite UPS of the same size and had no further trouble. Van, W1WCG On 8/18/2011 2:42 PM, Don Wilhelm wrote: > Someone also mentioned that the UPS might generate some hash - BUT that > would only be true if the AC is removed from the UPS. Under normal > conditions with AC present, the inverter is not active. > > It was not the initial question, but -- if you want to keep transmitting > after an outage, you will have to implement the large battery solutions > that have been mentioned. > > 73, > Don W3FPR > > On 8/18/2011 2:22 PM, Guy Olinger K2AV wrote: >> I'll repeat W2CS suggestion, get a UPS, then plug the K3's power supply into >> the UPS. Since you are trying only to allow yourself to shut down cleanly, >> you can get the smallest capacity, and therefore the cheapest version. It >> will handle the K3's RX current for quite a while, even with a small UPS. >> >> Some of the commentary seems to be about creating a full run floating >> battery alternate supply. If you want that, it's one approach, but if all >> you want is orderly shut down, you hardly need go that far. >> >> If you already have a UPS for your PC, plug the K3's power supply into that >> UPS. When you are operating with AC the extra drain makes no difference to >> the UPS. When the power goes down, cease transmitting quickly and you will >> be fine. The K3 in RX only adds about 20 watts to the load on the AC. >> >> 73, Guy. >> >> On Thu, Aug 18, 2011 at 10:36 AM, Ron D'Eau Claire<[hidden email]> wrote: >> >>> The danger with the K3 seems to be if power is removed while it's actively >>> writing new data to memory. Early in the K3 program several people who >>> switched power off at the supply quickly reported finding the firmware >>> "corrupted" in various ways upon restoring power because of that. >>> >>> Certainly no physical damage was done, but it is rather inconvenient to >>> reload all the firmware. >>> >>> 73, >>> >>> Ron AC7AC >>> >>> ______________________________________________________________ >>> 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 >>> >> ______________________________________________________________ >> 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 >> > ______________________________________________________________ > 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 > 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 |
Re: K3-Front panel shut down question. [End of Thread soon]
|
Administrator
|
Folks, let's wind down this thread, as it is hitting the max daily posting limit for topics.
73, Eric WA6HHQ List Moderator www.elecraft.com _..._ ______________________________________________________________ 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 |
Re: K3-Front panel shut down question.
|
|
In reply to this post by kf4clo
harbor freight has a 10 bux float charger for 12 v batteries
I believe it will start at 2 amp then trickle back to a hold charge usually have good luck with H F Bob K3DJC On Thu, 18 Aug 2011 16:30:05 -0700 Jim Brown <[hidden email]> writes: > On 8/18/2011 11:22 AM, Guy Olinger K2AV wrote: > > Some of the commentary seems to be about creating a full run > floating > > battery alternate supply. If you want that, it's one approach, > but if all > > you want is orderly shut down, you hardly need go that far. > > Actually, this is quite easy and inexpensive to do. I use one of the > > biggest 12V batteries that Costco sells (about $75) and float charge > it > with a little 10A switching power supply that I bought for $10 at a > > hamfest. I've adjusted the float voltage to 14V, and the battery > lasts > for at least 3 years. The key is to carefully set the float voltage > so > that it doesn't overcharge the battery. > > 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 > > ____________________________________________________________ Penny Stock Jumping 3000% Sign up to the #1 voted penny stock newsletter for free today! http://thirdpartyoffers.juno.com/TGL3141/4e4db1a2b213458636m03vuc ______________________________________________________________ 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 |
«
Return to [K3]
|
1 view|%1 views
| Free forum by Nabble | Edit this page |