Owen Duffy wrote:

Tony Giacometti wrote in
news:bcSdnVU4bZ7W86LanZ2dnUVZ_vShnZ2d@hawaiiantel. net:


I am using a heavily modified Drake R-4c receiver. Sherwood mods.
And I at this point I only built the 80 meter loop as I wanted to make
sure it worked on 80 before I went and built one for 160.

I obviously misunderstood you when you provided a link to a two band
antenna... or did you forget to tell us that?

I used the design for the 80 meter loop - I would think they are mostly
independent of each other.



I will let you rework the calcs for your scenario.

????



I don't think ITU-R P.372-8 had my neighborhood in mind when it was
composed.

S-9 on this receiver is about the minimum on 160 and S-7 is the
minimum on 75.

S meter readings are pretty meaningless, but using the convention of 50uV
for S 9, 6dB/SPoint, ITU-R P.372-8 does indeed suggest median noise at
~S7 for a 2kHz bandwidth and Residential locale.

As to whether your receiver indicates S7 accurately, that is another
matter.

S-9 is 50 uv on this receiver on 40meters - can't be sure its exactly the
same on 80, but the calibration voltage for S9 is very very close on 80.




People who brag about S1 noise level on 80m have a lossy antenna and/or
(and) an innaccurate S meter.

or they are lying........



Much of the time its higher and a royal pain in the arse.


Something many of us experience.

Owen