[Elecraft] Hum on KPA1500

[Salvatore Ted K2QMF]

>From the Power Supply or KPA1500?? Or Both??

On 4/5/2020 5:03:51 PM, Carl Yaffey <cyaffey at columbus.rr.com> wrote:
Hum is in the shack. 


On Apr 5, 2020, at 4:58 PM, Salvatore Ted K2QMF <k2qmf at juno.com [mailto:k2qmf at juno.com]> wrote:

Hum on your Transmit Signal??
Or hum in the shack??
Where is the hum coming from??

On 4/5/2020 4:51:23 PM, Carl Yaffey <cyaffey at columbus.rr.com [mailto:cyaffey at columbus.rr.com]> wrote:
I have developed a loud hum with the KPA1500 on 17m and 15m. A slight hum on 20m. All other bands, no hum.
It’s power dependent. Loud at full power, hum reduces as power is lowered. Not too bad at 500w.
Suggestions?
73.

Carl, K8NU.
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft [http://mailman.qth.net/mailman/listinfo/elecraft]
Help: http://mailman.qth.net/mmfaq.htm [http://mailman.qth.net/mmfaq.htm]
Post: mailto:Elecraft at mailman.qth.net [mailto:Elecraft at mailman.qth.net]

This list hosted by: http://www.qsl.net [http://www.qsl.net]
Please help support this email list: http://www.qsl.net/donate.html [http://www.qsl.net/donate.html]
Message delivered to k2qmf at juno.com [mailto:k2qmf at juno.com]