Thread: DX-120
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Old September 24th 06, 11:57 PM posted to rec.radio.shortwave
Telamon Telamon is offline
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First recorded activity by RadioBanter: Jul 2006
Posts: 4,494
Default DX-120

In article , "Mike"
wrote:

"Telamon" wrote in
message

.com...
Nice radios. Drake's are the best.


Well, an R8B would be the best. My R8 is not the best radio I have.

Please explain how precisely tuning in a station improves reception
during selective fading. This makes no sense to me.


I can't explain it. All I know is that the 2100 using the
bandspread sometimes gives me a better signal than the 800 using the
sync. They are both using their internal whip antennas, and are
side by side on the table. The 2100 performs *much* better than the
800 without using the 800's sync. Selective fading is much less
drastic. Turning on the sync on the 800 *usually* makes it perform
better than the 2100, but not *always*.


You are comparing two radios with different circuitry and
specifications. What you are seeing (hearing) is most likely a
difference in radio performance. Speculating for a moment I could guess
that the 2100 might have greater dynamic range or maybe a faster AGC
that can follow the a rapid fade over the SAT 800 but there is no way I
can understand the statement that precise tuning can equal using sync
detection. Using a standard AM detector and tuning a station spot on
compared to being slightly off tuned is not going to make an
improvement in a fading signal that using a sync detector is going to
make.

Generally, I have found that precise tuning allows a sync detector to
maintain lock on a weak signal.

--
Telamon
Ventura, California