Hello Alan,
Thank you for the hands up.
Years ago an old hand told me that it made a lot of difference with the
coax inside or outside the mast.
But I don't know if the mast was grounded at the bottom, up on the roof or
what else.
So it is time to get a proper metalic mast and do some tests.
Besides my SLM's, I now have a PERSEUS SDR for two years, which is not
only an excellent receiver, but also a rather sophisticated piece of test
gear. It has level meter, whith a 0.1 dB resolution, which is not a toy
but accurate to 0.1 dB for relative measurements. The bandwidth can be set
to 5 Hz if you like, which allows level measurements down to -143 dBm. And
a 40 MHz spectrum analyzer with the noisefloor at -110 dBm, which is great
in tracking down wide band noise, off air antenna tests etc.
73,
Roelof, pa0rdt
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