[Elecraft] K3S Audio buzz on transmit, especially AM

[Jim Brown]

I think you may have hit on it, Bill. Say it's a pulse-regulated 
controller on the battery is on the soft side.  BTW -- most solar charge 
controllers put out a lot of RF noise. The only good pulsing 
controllers  I've found are the MPPT controllers made by Genasun.
https://sunforgellc.com/genasun/#gen_product_row

Another question to help diagnose the problem if it's the battery -- 
what's the DC voltage at the battery in RX mode?  In TX mode?  What does 
the K3 internal voltmeter read for RX and TX?

73, Jim K9YC

73, On 4/26/2019 2:36 PM, K8TE wrote:
> The word that struck my attention is "solar" and the possibility of that
> controller causing noise.  When you were connected to just the battery and
> dummy load, was the battery disconnected from the solar system?