Re: New BITX40v3 seams deaf on ssb phone signals
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Mark
Receiving CW but having broken audio on SSB might be caused by several things
but I would start with checking the BFO frequency relative to the crystal filter
characteristic.? The BFO for USB should be 12 to 16 db down on the lower skirt
of the filter passband.?
Another possibility is that there could be something wrong with BFO injection
level (too low) which could be the case if you have replace the BFO oscillator
with a DDS or Si5351a and set its output level too low.
Same thing with incorrect LO injection levels.
It could also be something really trivial like a damaged speaker (dirt in the
air-gap or a bent frame) causing the voice coil to drag.
Arv? K7HKL
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On Tue, Dec 6, 2016 at 8:56 PM, 'Mark W' k3mrk1@... [BITX20] <BITX20@...> wrote:
?
Someone has probably mentioned this already, but out of the box, I’m not sure it tunes very far into the US phone portion of the band. ? From: BITX20@... [mailto:BITX20@...]
Sent: Tuesday, December 06, 2016 9:33 AM
To: BITX20@...
Subject: [BITX20] New BITX40v3 seams deaf on ssb phone signals ? ? I just got the new 40 m version three board in the mail three weeks ago. Very pretty packaging I might add. Unfortunately this thing seems ?not to like S9 phone signals in the extra class portion of the 40 m band. It actually doesn't like any voice signals. I can hear some strong CW stations in that portion of the band but no real voice conversations. When I kick my dipole over to any one of my other HF Rigs, ?are your booming voice signals.? The food suffered no trauma in transit that I can tell and everything seems to be fine.? ? Any ideas now? I'm thinking of throwing a signal generator on it and seeing what I got.
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