[Lowfer] its been good to know ye

Bill Ashlock ashlockw at hotmail.com
Thu Mar 1 00:04:22 EST 2007


Zack,

John A has some good ideas to try (and hard to beat his excellent receiving 
accomplishments) but how about just eliminating your amp, as a test, by 
adding a low Z link to your loop? Also I noted a rotator in your picture. 
The control cable can become an antenna for WILL-AM, as well as noise, and 
can capacity couple these signals into the loop. Decoupling and/or shielding 
is needed to prevent this from happening.

Another thought is to increase the Q of the loop to something like 200 as a 
way of getting a better desired signal level over that of WILL-AM

Bill


>
> I'm not quite sure where everyone is moving from or to, but I hope some
> people are staying around here.
>
> I built this loop some time ago:
>
> http://www.cpinternet.com/~ki0le/pages/loop1.htm
>
> Then I built this remotely-tuned preamp and mounted it on the loop:
>
> http://www.amrad.org/projects/lf/lfpreamp.html
>
> The problem I'm running into is that I live about 5 miles from radio
> station WILL-AM on 580 kHz.  I'm having serious intermod and distortion
> problems due to this station.  I measure almost 2 volts p-p of WILL-AM at
> the coax connector in the shack. It's making this antenna system virtually
> useless.
>
> Any idea what I can do to remedy this?  Forget about the preamp and just
> tune the loop remotely with the MVAM109 diodes?
>
> 73, Zack W9SZ



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