Hello all, I am doing my first ever Cb alignment on a Cobra 148gtl. Everything worked fine with the exception of the SSB s-meter alignment (Step 7 of 3.0 Receiver Alignment in the manual). The step says input a 27.186MHz signal, no modulation at 100 uv while on ch. 19 USB. The meter never swings past 3 when adjusting VR2. Am I doing something wrong or is there an error in the manual. Thanks in advance for the help.
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Cobra 148gtl S-meter Alignment
- Thread starter Scribble
- Start date
Either the generator isn't putting out 100uV, or the radio isn't on freq. If the S-meter is working on AM correctly; then it should also work on SSB the same. Might be a problem in the quad op amp circuit or the adjustment VR; but that remains to be seen . . .
First I'll blame it on test equipment.
The problem appears to have been a short between the headsets or a cold frequency counter. I went through the alignment again and this time the frequency counter showed a 500+ hertz error on USB. Either I tweaked something in error (most likely) or the counter was way off from being used cold and not letting it warm up. I let everything cook for a while and it all worked the second go around. Robb, thanks for the assist. I appreciate the help!
