Re: LF: Pre amp *after* BPF??

[N1BUG <paul@n1bug.com>]

Good point, Rik.

I agree. The reason I run preamps is that with the LNV antenna my
receivers failed this test without it. :-)

73,
Paul N1BUG


On 03/16/2018 08:31 AM, Rik Strobbe wrote:
> Keep in mind that you only need a pre amp if the "antenna noise" is
> below the receiver noise.
> 
> Most receivers have reduced sensitivity at LF / MF, but the
> noiselevels at these frequencies is high compared to HF.
> 
> Easy to check: Listen (with connected antenna) on a quiet frequency
> (only noise, no signal). Next disconnect the antenna. If the noise
> level decreases you do not need a pre amp (in fact a pre amp will
> only deteriorate the IMD behavior and thus create more ghost signals).
> 
> 
> 73, Rik  ON7YD - OR7T