On Fri, 12 Mar 2004 16:51:08 -0500, "Andy in NJ" SHORECOGS at COMCAST
DOT NET wrote:

"Dave Hall" wrote in message
news
On Thu, 11 Mar 2004 23:20:54 -0500, "Andy in NJ" SHORECOGS at COMCAST
DOT NET wrote:
Now that could be a problem. What are the particulars? Does the radio
have receive audio? Does it have modulation on SSB? The chances are
that two different mikes are not both bad. But it does help to check
them on a known good radio.

There is receive audio, no modulation on AM or SSB.



That's good news as it eliminates the audio amp/modulator I.C., which
has been discontinued and is generally not available, except from
someone who might have some old stock.

Assuming that the mikes are good (and wired correctly!), your best bet
would be checking the mike preamp I.C., and the related circuitry.
This is something that might be best accomplished with an
oscilloscope, (working forward) or a signal injector (working
backward).

Dave
"Sandbagger"
http://home.ptd.net/~n3cvj