It is the LED board in the PS. Dave wo2x
Sent from my iPad > On Jun 27, 2020, at 7:55 PM, [email protected] wrote: > > Hi Steve, > > Thanks for the update. > > So, this is the LED board on the amp, not the power supply? Guess we don't > know at what serial number the change was made? > > Mike > K7PI > > > -----Original Message----- > From: [email protected] <[email protected]> On > Behalf Of STEPHEN R ZUMBRUN > Sent: Saturday, June 27, 2020 16:39 > To: [email protected] > Subject: [Elecraft] KPA1500 Power Supply Fan Noise > > Hello, all and Happy Field Day. Say I just wanted to comment about Elecraft > service and the help they provided me to make a mod to my KPA1500. My > KPA1500 power supply fan was rather noisy. I had seen discussion on the > reflector about this so I contacted Doug at Elecraft service. He ask if I > could solder. I informed him I could and he sent me a new 22 ohm, 3 watt > resistor and i swapped it out with the 10 ohm, 3 watt resistor on the LED > board of the power supply. I am much pleased with the sound of the power > supply fan now after the modification. My amp is an early serial number and > the new amps come with the 22 ohm resistor on the LED board. So...if your > power supply is a bit noisy you might consider this mod and contact Doug at > Elecraft Service. The Elecraft part number of the resistor is E500128. 73, > Steve W0SZ. > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html Message > delivered to [email protected] > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
