KPA1500 Power Supply Issue
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KPA1500 Power Supply Issue
 
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Last August, I had my KPA1500 repaired by Elecraft as one PA transistor failed. They replaced both PA transistors and sent it back to me under warranty. Only the RF deck was shipped to Elecraft. The KPA1500 power supply stayed home unplugged during this time,.
I kept using my backup Amp until today when I removed the KPA1500 from the box and installed it in my shack. I connected everything up and connected the power supply to my 220v outlet. Upon powering up the Power Supply, only the AC On green LED lights. Nothing from the HV Supply or LV Supply LEDs on the power supply. The RF deck does not power on. I have re-seated the heavy red/black cables several times as well as unplugged and plugged in the power supply several times, however the power supply does not seem to provide power to the RF deck. Before I pack it up and ship it back to Elecraft, is there anything else that I should check? Thanks, Paul N6PSE ______________________________________________________________ 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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Paul,
Be certain the control cable between the KPA1500 RF deck and the power supply is seated properly and the jackscrews tightened. The fact that the KPA1500 power switch does nothing is an indicator that the cable may have some problem. 73, Don W3FPR On 2/17/2019 6:41 PM, paule408--- via Elecraft wrote: > Last August, I had my KPA1500 repaired by Elecraft as one PA transistor failed. They replaced both PA transistors and sent it back to me under warranty. Only the RF deck was shipped to Elecraft. The KPA1500 power supply stayed home unplugged during this time,. > I kept using my backup Amp until today when I removed the KPA1500 from the box and installed it in my shack. I connected everything up and connected the power supply to my 220v outlet. > Upon powering up the Power Supply, only the AC On green LED lights. Nothing from the HV Supply or LV Supply LEDs on the power supply. The RF deck does not power on. > I have re-seated the heavy red/black cables several times as well as unplugged and plugged in the power supply several times, however the power supply does not seem to provide power to the RF deck. > Before I pack it up and ship it back to Elecraft, is there anything else that I should check? > Thanks, > Paul N6PSE ______________________________________________________________ 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 Supply Issue
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Don, thanks so much for your swift reply and great suggestion.
I re-seated the grey control cable and snugged it up and the amp is working fine now! Problem solved! (Cockpit error) Thanks all, Paul N6PSE On Sunday, February 17, 2019, 3:53:59 PM PST, Don Wilhelm <[hidden email]> wrote: Paul, Be certain the control cable between the KPA1500 RF deck and the power supply is seated properly and the jackscrews tightened. The fact that the KPA1500 power switch does nothing is an indicator that the cable may have some problem. 73, Don W3FPR On 2/17/2019 6:41 PM, paule408--- via Elecraft wrote: > Last August, I had my KPA1500 repaired by Elecraft as one PA transistor failed. They replaced both PA transistors and sent it back to me under warranty. Only the RF deck was shipped to Elecraft. The KPA1500 power supply stayed home unplugged during this time,. > I kept using my backup Amp until today when I removed the KPA1500 from the box and installed it in my shack. I connected everything up and connected the power supply to my 220v outlet. > Upon powering up the Power Supply, only the AC On green LED lights. Nothing from the HV Supply or LV Supply LEDs on the power supply. The RF deck does not power on. > I have re-seated the heavy red/black cables several times as well as unplugged and plugged in the power supply several times, however the power supply does not seem to provide power to the RF deck. > Before I pack it up and ship it back to Elecraft, is there anything else that I should check? > Thanks, > Paul N6PSE ______________________________________________________________ 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 Supply Issue
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Administrator
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In reply to this post by Elecraft mailing list
Hi Paul,
If the green AC light is on and the PS 50V LED is not coming on when you try to power up the amp from the RF deck front panel it indicates that the two boxes are not talking. It sounds like the control cable between the amp and PS is not fully seated. Try unscrewing it on both ends and re inserting it firmly without depending on the screws to pull it in tightly. As an early field tester for the amp I suspect you may have one of the early pre-release control cables that had slightly long screws and may not seat fully if you relied on screwing it in to seat it. In any case, we can also get you a new cable to try after we are back in the office Tuesday. 73, Eric elecraft.com --- Sent from my iPhone 6S > On Feb 17, 2019, at 3:41 PM, paule408--- via Elecraft <[hidden email]> wrote: > > Last August, I had my KPA1500 repaired by Elecraft as one PA transistor failed. They replaced both PA transistors and sent it back to me under warranty. Only the RF deck was shipped to Elecraft. The KPA1500 power supply stayed home unplugged during this time,. > I kept using my backup Amp until today when I removed the KPA1500 from the box and installed it in my shack. I connected everything up and connected the power supply to my 220v outlet. > Upon powering up the Power Supply, only the AC On green LED lights. Nothing from the HV Supply or LV Supply LEDs on the power supply. The RF deck does not power on. > I have re-seated the heavy red/black cables several times as well as unplugged and plugged in the power supply several times, however the power supply does not seem to provide power to the RF deck. > Before I pack it up and ship it back to Elecraft, is there anything else that I should check? > Thanks, > Paul N6PSE > > ______________________________________________________________ > 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 Supply Issue
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Administrator
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In reply to this post by Elecraft mailing list
Looks like Don beat me to the punch. (I'm reading to slow today ;-)
Thanks Don! 73, Eric elecraft.com _..._ > On Feb 17, 2019, at 4:19 PM, paule408--- via Elecraft <[hidden email]> wrote: > > Don, thanks so much for your swift reply and great suggestion. > I re-seated the grey control cable and snugged it up and the amp is working fine now! > Problem solved! (Cockpit error) > > Thanks all, > Paul N6PSE > On Sunday, February 17, 2019, 3:53:59 PM PST, Don Wilhelm <[hidden email]> wrote: > > Paul, > > Be certain the control cable between the KPA1500 RF deck and the power > supply is seated properly and the jackscrews tightened. The fact that > the KPA1500 power switch does nothing is an indicator that the cable may > have some problem. > > 73, > Don W3FPR > >> On 2/17/2019 6:41 PM, paule408--- via Elecraft wrote: >> Last August, I had my KPA1500 repaired by Elecraft as one PA transistor failed. They replaced both PA transistors and sent it back to me under warranty. Only the RF deck was shipped to Elecraft. The KPA1500 power supply stayed home unplugged during this time,. >> I kept using my backup Amp until today when I removed the KPA1500 from the box and installed it in my shack. I connected everything up and connected the power supply to my 220v outlet. >> Upon powering up the Power Supply, only the AC On green LED lights. Nothing from the HV Supply or LV Supply LEDs on the power supply. The RF deck does not power on. >> I have re-seated the heavy red/black cables several times as well as unplugged and plugged in the power supply several times, however the power supply does not seem to provide power to the RF deck. >> Before I pack it up and ship it back to Elecraft, is there anything else that I should check? >> Thanks, >> Paul N6PSE > > ______________________________________________________________ > 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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