7994RE: [RADIOSHACKDX394] Re: WBCQ (was "Hollow" sound with TWO Antennas)
- Oct 8, 2013Station "CHU" in Canada does the same thing. The lower sideband issuppressed, and only the upper is heard. 3.335, 7.850, 14.670.Try it.73KW1BNC-----Original Message-----
From: RADIOSHACKDX394@yahoogroups.com [mailto:RADIOSHACKDX394@yahoogroups.com]On Behalf Of c dorcey
Sent: Monday, October 07, 2013 22:03
Subject: [RADIOSHACKDX394] Re: WBCQ (was "Hollow" sound with TWO Antennas)I tuned up on WBCQ one night with my "better" radio (a Kenwood TS-940S transceiver). Since WBCQ is a broadcast station, I was in AM mode, of course. However, sometimes I can get a better sound by selecting one sideband or the other, depending on the interference conditions, and I was astonished to hear that WBCQ had NO lower sideband! I don't have a spectrum analyzer to visually prove this, but switching from USB to LSB made the signal almost inaudible. Unlike the suppressed-carrier SSB modulation that hams use, WBCQ must have been radiating enough unmodulated carrier to support AM demodulation, but that might explain something of the odd audio you report. If I had tried this with my DX-394, I would have had to retune every time I switched sidebands, because the BFOs were badly off-frequency, and I might not have been able to zero-beat the main carrier very well, because the DX-394 tuning increment is so small. But the TS-940 has 10 Hz tuning, and proper sideband processing.
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