A lot of these low noise receiving antennas can be badly detuned
if you set them up near a transmit vertical resonant on the band
of interest. You might check if you have some F/B on other
bands. That would be pretty convincing evidence of this.
As to adjusting the terminating resistor, you could try hooking up
one of the old Allen-Bradley pots with the carbon elements.
They are reasonably non-inductive. I have used a combination of
a 220 to 510 ohm carbon comp fixed resistor in series with a 1K
ohm carbon pot. Works OK. 73, David K3KY
On 25 Jan 2002 at 10:26, Bill wrote:
> Looking for comments on adustment of terminating resistor for best
> front to back...(a null?). Mine is 15' 43'15' Fed with rg58 to a
> trifilar wound (ferrite core). I cannot hear a null on off air
> stations to the back or on signals generated off the back...any
> suggestions? Bill.
>
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