On Fri, 4 Mar 2005 21:30:40 -0800, "CW" wrote:
Classic. I new someone would come up with the "stick a coat hanger in your
antenna socket and be happy" line.
As a rule I subscribe to the school that says every antenna should be
well-matched, in the clear and fed with low loss line, even those used
for receiving. Must come from my VHF/DXing background.
That said, I know my friend Roy is correct and I am wrong when he
gives this advice. Generally speaking, the SNR is set at the antenna
and nothing done after that will make much difference. This isn't
always the case if there are noise sources that can nulled or reduced
by phasing or other directive techniques that don't reduce the signal
simultaneously.
Roy did not mention this at all. He spoke to "impedance matching."
Wes N7WS
ps. You have no idea how hard it is to type with one (the "wrong")
hand while doing drugs. I had 2 1/2 hours of surgery putting my rt.
shoulder together on Thursday. Just in time to keep me out of the DX
contest---good planning
"Roy Lewallen" wrote in message
...
Try this simple test.
Tune your receiver to a part of the dial where there's no station.
Disconnect the antenna from your receiver. If the noise level drops,
impedance matching won't help your signal/noise ratio, it'll just make
everything louder. You can accomplish the same thing by turning up the
volume control.
Roy Lewallen, W7EL
[snip]