[Elecraft] [KPA500] incredible hum from PA

[W1GO (Joe)]

Kevin,

Yes.  had the problem.  Crazy loud hum / buzz.  Bad transformer I was told.  All quiet on the eastern front now.  If it is a bad transformer it can be fixed but you’ll have to eat the shipping charge.

Joe
W1GO

> On Dec 19, 2016, at 9:10 PM, kevino z <z_kevino at hotmail.com> wrote:
> 
> Just got my KPA500 and KAT500. I hooked the PA up to 240v (well, my Mains are 248v), so I made sure the assembled PA has the yellow transformer tap, from the factory.
> When I engage the amp, there is a crazy buzz. I use a KPA500 at work, but it is on 120v and I never hear this buzz. Before I swap fuses, and switch over to 120v to test, does anyone else have this issue?
> The KPA500 is hooked up to a KX3/KXPA100 combo, just in case someone would ask.
> Thanks
> -Kevin (KK4YEL)
> 
> 
> No trees were killed in the sending of this message. However, a large number of electrons were terribly inconvenienced !
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to w1go at icloud.com