[Elecraft] Advanced Receiver Research P50VDG 6M Preamp

[Jim Brown]

On Wed,1/25/2017 2:01 PM, Ken Arck wrote:
> (not to rain on your parage but you do realize that the .5 dB noise 
> figure is essentially meaningless if the preamp is in your shack, right?) 

Not true. Yes, at the antenna end of the feedline is better, but the NF 
will apply to whatever signal the preamp sees. AND it strongly depends 
on how noisy our QTH is as compared to the circuit noise withing the 
radio/preamp. Preamps won't help much if you have a lot of RX noise.

A good rule of thumb is that you are not limited by circuit noise if the 
noise level increases by 10 dB when you connect the antenna to the 
radio/preamp.

73, Jim K9YC