> often noted on 10M and 6M. Two, they were different
antennas, different
> sizes of antennas -- e.g. different gain. Three,
different heights of the
> two antennas (which is probably the most important one).
They had different patterns, and you were in entirely
different locations. Both of those are key.
Gain is not, unless you all were using 1950 two-tube Star
Roamer receivers that were limited by internal noise.
Four, different
> feedline lengths and quality. Actually, mine was a lot
longer and probably
> more "iffy" performance wise too.
Feedline loss doesn't matter a bit, unless the receiver
system is limiting on internal noise.
> If I had to choose between a big 6-el 20M monobander to
work DX like VK0IR
> and a small tribander -- even at the same height -- let
alone a dipole at
> the same height -- I'd take the 6-el monobander every
time, for receive as
> well as transmit.
So would I.
A 6 element Yagi at 100 feet probably has a more desireable
pattern than a three element at half the height for DX. The
gain difference does not matter, as long as receiver noise
floor is set by noise propagating into the antenna.
I was receiving ONLY, I'd choose the antenna with the
highest ratio of response at the wave angle and direction of
the DX and the least response in all other directions.
As a matter of fact, I have -5dB gain antennas that
constantly out-receive my 40 meter full size monobander at
130 ft. I almost never use the Yagi for receiving. I can
give examples where a -10dB gain system would receive better
than the 6 element monobander.
Everything at:
http://www.w8ji.com/receiving.htm
applies to general HF, if you take out the things specific
to 160-40 meters like the increase in night time noise.
73 Tom
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