[Elecraft] K3, VHF Diversity

[Jim Brown]

On Wed,2/18/2015 11:25 AM, Chuck Smallhouse wrote:
> I don't even allow any computers to be on when performing 2M EME 
> operations, due to the residual broad band noise and birdies emitted 
> by most . 

Yes, that's a real problem. You may do better with older computers. My 
T2x and T4x-series Thinkpads will run (but won't charge) on 12VDC, which 
eliminates any noise from the switching power supply, but it doesn't 
help with noise radiated directly by the laptop. Newer computers seem to 
be noisier than these older ones. We discovered that on 6M/2M grid trip 
last fall. The T43s were quiet enough, but my partner's much newer one 
was pretty bad.

73, Jim K9YC