[Elecraft] KPA1500 hum - problem solved

[Carl Yaffey]

It turned out to be using the 4-position Alpha-Delta coax switch. No problem until I connect both the vertical and the dipole to it. 

> On Apr 5, 2020, at 5:37 PM, Buck <radiok4ia at gmail.com> wrote:
> 
> I would bet your coax shield is acting like a radial and bringing RF back into the shack.  Need a choke.
> 

Carl Yaffey  K8NU
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