KPA1500 power aupply fan
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K2XT here. Greetings,
We are installing K8DM's brand new KPA1500 here at my qth today replacing a KPA500. He runs the station remotely from VA; my QTH is in NJ. (I host the station for him). So, it is powered up and running. When not in use it appears as if (according to the manual) it needs to generate a small voltage/current to the rf deck to allow it to function. No problem, that makes sense. The problem is, there is a fan running in the power supply, and it is annoying! The remote station is in a spare bedroom and visiting guests will have to endure this noise. Plus, I'd like the equipment to go off when it is turned off. I don't want a fan running 24/365. Does the PS really generate that much heat that it needs a fan? This is not acceptable. Wayne, surely you didn't design it this way. Surely there is an option we set somewhere to disable the fan. What say, anyone? Rick K2XT ______________________________________________________________ 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: KPA1500 power aupply fan
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If the amp is on, you should be able to press the RF deck "ON" button at the
bottom right of the RF deck front panel, the LEDs and LCD should go dark, all relays should be released, and power supply fans should stop. The only visible LED is the green light on the power supply. Press ON when the amp is off, and it turns on. When "off", only a small power supply (without fan) provides enough for the microcontroller to wake up on power button press or a number of other ways to turn the amp on. There are a few ways to turn the unit on besides the front panel button. Supplying 12V to a rear connector, pulling down a pin on the ACC connector, data from a PC to the USB host port, etc. If you're supplying 12V to the rear connector, it should turn the amp on until the 12V drops. Some people use the 12V RCA output on the K3 (also used to power the P3) to turn their amp on with the K3. 73 de Dick, K6KR -----Original Message----- From: [hidden email] <[hidden email]> On Behalf Of Rick Stealey Sent: Monday, October 1, 2018 14:44 To: [hidden email] Subject: [Elecraft] KPA1500 power aupply fan K2XT here. Greetings, We are installing K8DM's brand new KPA1500 here at my qth today replacing a KPA500. He runs the station remotely from VA; my QTH is in NJ. (I host the station for him). So, it is powered up and running. When not in use it appears as if (according to the manual) it needs to generate a small voltage/current to the rf deck to allow it to function. No problem, that makes sense. The problem is, there is a fan running in the power supply, and it is annoying! The remote station is in a spare bedroom and visiting guests will have to endure this noise. Plus, I'd like the equipment to go off when it is turned off. I don't want a fan running 24/365. Does the PS really generate that much heat that it needs a fan? This is not acceptable. Wayne, surely you didn't design it this way. Surely there is an option we set somewhere to disable the fan. What say, anyone? Rick K2XT ______________________________________________________________ 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: KPA1500 power aupply fan
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In reply to this post by Rick Stealey
The power supply fans always turn off within 10 seconds or so after turning of
the main RF deck. 73, Eric /elecraft.com/ On 10/1/2018 2:43 PM, Rick Stealey wrote: > K2XT here. Greetings, > We are installing K8DM's brand new KPA1500 here at my qth today replacing a KPA500. > He runs the station remotely from VA; my QTH is in NJ. > (I host the station for him). > > So, it is powered up and running. When not in use it appears as if (according to the manual) it needs to generate a small voltage/current to the rf deck to allow it to function. No problem, that makes sense. > The problem is, there is a fan running in the power supply, and it is annoying! The remote station is in a spare bedroom and visiting guests will have to endure this noise. Plus, I'd like the equipment to go off when it is turned off. I don't want a fan running 24/365. Does the PS really generate that much heat that it needs a fan? > > This is not acceptable. Wayne, surely you didn't design it this way. Surely there is an option we set somewhere to disable the fan. > > What say, anyone? > > Rick K2XT > ______________________________________________________________ > 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: KPA1500 power aupply fan
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Administrator
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In reply to this post by Rick Stealey
Rick and everyone - There should be NO fans running in the power supply after
turning off the RF deck from its front panel. Are you sure the RF deck front panel is OFF? (No lights on the RF deck FP) The PS fan runs from the same supply that supplies the 50 V to the amp. That supply is definitely turned off when the RF deck front panel is off, which also kills the PS fans. The fans have absolutely nothing to do with the 12 VDC supply going to the RF deck. In any case, no not modify how voltage is supplied to the RF deck, as this will not fix anything and will definitely void the Warranty. If you are not able to resolve this issue contact our team at [hidden email] or via the phone and we'll help you figure out what is happening. My only thought is that there could be a short in the control cable between the amp RF deck and PS that is keeping the 50V supply and fans on in the PS. (Or on one of the connectors in the RF deck or PS.) Our support team will help you debug whatever is happening if its a hw issue.. 73, Eric /elecraft.com/ On 10/1/2018 2:43 PM, Rick Stealey, [hidden email] wrote: > K2XT here. Greetings, > We are installing K8DM's brand new KPA1500 here at my qth today replacing a KPA500. > He runs the station remotely from VA; my QTH is in NJ. > (I host the station for him). > > So, it is powered up and running. When not in use it appears as if (according to the manual) it needs to generate a small voltage/current to the rf deck to allow it to function. No problem, that makes sense. > The problem is, there is a fan running in the power supply, and it is annoying! The remote station is in a spare bedroom and visiting guests will have to endure this noise. Plus, I'd like the equipment to go off when it is turned off. I don't want a fan running 24/365. Does the PS really generate that much heat that it needs a fan? > > This is not acceptable. Wayne, surely you didn't design it this way. Surely there is an option we set somewhere to disable the fan. > > What say, anyone? > > Rick K2XT > ______________________________________________________________ > 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 Rick Stealey
Mine works exactly as Eric says it should. I have not uploaded any new F/W, still using the original issue. Anything change for the PS in a newer version? Just a thought . . . .
Ted, KN1CBR ------------------------------ Message: 13 Date: Wed, 3 Oct 2018 14:43:58 -0700 From: "Eric Swartz - WA6HHQ, Elecraft" <[hidden email]> To: Rick Stealey <[hidden email]>, "[hidden email]" <[hidden email]> Subject: Re: [Elecraft] KPA1500 power aupply fan Message-ID: <[hidden email]> Content-Type: text/plain; charset=utf-8; format=flowed Rick and everyone - There should be NO fans running in the power supply after turning off the RF deck from its front panel. Are you sure the RF deck front panel is OFF? (No lights on the RF deck FP) The PS fan runs from the same supply that supplies the 50 V to the amp. That supply is definitely turned off when the RF deck front panel is off, which also kills the PS fans. The fans have absolutely nothing to do with the 12 VDC supply going to the RF deck. In any case, no not modify how voltage is supplied to the RF deck, as this will not fix anything and will definitely void the Warranty. If you are not able to resolve this issue contact our team at [hidden email] or via the phone and we'll help you figure out what is happening. My only thought is that there could be a short in the control cable between the amp RF deck and PS that is keeping the 50V supply and fans on in the PS. (Or on one of the connectors in the RF deck or PS.) Our support team will help you debug whatever is happening if its a hw issue.. 73, Eric /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 Message delivered to [hidden email] |
Re: KPA1500 power aupply fan
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Administrator
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No changes in PS operation at all since the early KPA1500s shipped.
If the fans in the. PS do not turn off within 10 secs or so after the RF deck front panel power button turns it off, please contact [hidden email] for help. 73, Eric elecraft.com _..._ > On Oct 4, 2018, at 7:28 PM, Dauer, Edward <[hidden email]> wrote: > > Mine works exactly as Eric says it should. I have not uploaded any new F/W, still using the original issue. Anything change for the PS in a newer version? Just a thought . . . . > > Ted, KN1CBR > > ------------------------------ > > Message: 13 > Date: Wed, 3 Oct 2018 14:43:58 -0700 > From: "Eric Swartz - WA6HHQ, Elecraft" <[hidden email]> > To: Rick Stealey <[hidden email]>, "[hidden email]" > <[hidden email]> > Subject: Re: [Elecraft] KPA1500 power aupply fan > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=utf-8; format=flowed > > Rick and everyone - There should be NO fans running in the power supply after > turning off the RF deck from its front panel. > Are you sure the RF deck front panel is OFF? (No lights on the RF deck FP) > > The PS fan runs from the same supply that supplies the 50 V to the amp. That > supply is definitely turned off when the RF deck front panel is off, which also > kills the PS fans. The fans have absolutely nothing to do with the 12 VDC supply > going to the RF deck. > > In any case, no not modify how voltage is supplied to the RF deck, as this will > not fix anything and will definitely void the Warranty. > > If you are not able to resolve this issue contact our team at > [hidden email] or via the phone and we'll help you figure out what is > happening. > > My only thought is that there could be a short in the control cable between the > amp RF deck and PS that is keeping the 50V supply and fans on in the PS. (Or on > one of the connectors in the RF deck or PS.) Our support team will help you > debug whatever is happening if its a hw issue.. > > 73, > Eric > /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 > 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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