Topband: Need help in winning a Preamp Wager

[Jim Brown]

On Fri, 25 Feb 2005 18:18:49 -0600, Tim Duffy K3LR wrote:

>I have a 1200 foot European beverage that takes 1400 feet 
>of RG8x to get to it. The feedline loss to the receiver 
>is about 11 dB.

Gee, I hadn't thought of a feedline that long! With that much loss, I 
would certainly agree -- IF I was in a relatively quiet RF 
environment. :)  

On the other hand, 11 dB seems high for that length of that cable at 
1.8 MHz. Have you measured that much loss?  If so, I would be 
replacing it. Belden's data for 9258 ("sort of" equivalent to RG8X) 
is 0.37 dB/100 ft at 2 MHz. That works out to just over 5 dB for 1400 
ft. At 80 meters, it's more like 0.55 dB/100 ft. 

Have you found receive antennas on 160 to be circuit noise limited 
with the preamp in the shack?   

Jim K9YC