Question about Radio Communications
I have no Recive No Transmitt No signal on meter How to fix
Have the mic checked first to make sure wired correctly and or wires not broken where connect to plug----also check to see if same on SSB and Am.
President what? Madison, Lincoln etc.
Posted on Apr 24, 2012
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Posted on Jan 02, 2017
SOURCE: No Modulation!!
Most modulation problem could be traced to:
1. mic or the cable and/or the mic connector;
2. AMC (amplitude modulation control) - it's a single transistor that regulates modulation and occasionally has been known to clamped on the mic audio;
3. the AM/SSB switch - spraying with contact cleaner is a temporary remedy; and/or
4. audio amp - however if your receive audio is good, then this does not apply.
Hope this be of initial help/idea. Without a model number, I can't be more specific as to component(s) or PCB location but pls post back for any developments (or lack thereof) or should you need additional information.
Good luck and kindest regards.
Posted on Feb 09, 2008
Great now check TR42 AM POWER then check TR41 AM POWER REG. They are on right side twards rear of board with front of radio faceing you part side up. A good place to start!
Posted on Jul 07, 2007
It looks like you had some loose connections in that CB. you may want to also check for other cold solder joints throughout the units and touch them up with some solder. Might I suggest you use a desoldering tool and then just add new solder to the connection.
Posted on Sep 05, 2007
this sounds like the AM regulator has lost All of its smoke.(thats what electronic parts are made of) If this is A Grant the AM regulator is located in the rear right hand side of the radio.If it is a grant XL this is located on the very back of the radio on its on little circuit board.check this part part to see if is your problem.one other way that you can tell if this is the problem when it stop transmitting check it on side band (LSB or USB) to see if it transmitt.If it does that is most likley your problem.
Posted on Feb 02, 2009
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