---------- Forwarded message --------- From: Mike Flowers <[email protected]> Date: Sat, May 29, 2021 at 11:11 PM Subject: Re: [Elecraft] KPA500 cabinet buzz
Hi Mark, I’d verify this with Elecraft Support. When I got my KPA500 it was used and shipped with the transformer in a separate box. The assembly manual was very specific about how to position and tighten the washer and wing nut holding the transformer in place. Important to avoid mechanical buzzing … Perhaps downloading the KPA500 Assembly manual could provide some guidance. -- 73 de Mike Flowers, K6MKF, NCDXC - "It's about DX!" > On May 29, 2021, at 8:39 PM, Richard P McCoy <[email protected]> wrote: > > Mark: > > I have this same issue with my KPA500, > connected to my K3S via AuxIO cable. > > It's been that way since new from Elecraft. > It sounds like the AC transformer vibrating against the cabinet? > It's the same on different bands and power levels. > > I've just never had the time to research the problem. > > 73, Dick, N4UN > >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> > > After much searching, this 2.4 year old thread is the only info I can find on > this issue. I bought a factory built KPA500 a few months ago and mine buzzes > on CW key down. Af first I thought maybe this is normal as I never owned an > HF amp. Now I think it is a problem. > > Any know how to fix this? I can shoot a short movie if that helps. > > 73, > Mark K2QO > ______________________________________________________________ > 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]
