Copper Talk » Open Forum » Archived Messages » 2003 » 08/01/2003 to 08/31/2003 » Cobra 29, No TX no RX « Previous Next »

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Taz
Posted on Friday, August 22, 2003 - 8:20 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Hey guys, I was handed a cobra 29 today, doesnt TX or RX and its no in PA mode.

I peaked and Tweaked it for him awhile back and he opened the case and monkeyed with it.

Im not sure what the deal is, I was hoping some of you should have some insight on this one?

Taz
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Taz
Posted on Friday, August 22, 2003 - 9:30 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

I redid the audio section with better caps, put in a trb-1 echo board, different finals, even sold him an rk 56 mic, receive mod, variable power, I added a "super talk kit" that didnt do much but looked good, lol.

And ontop of that I sold him my palomar 225 amp and he had a screaming little mobile then he goes ahead and opens the case and drops a stick of solder on the board and said the receive all of a sudden went dead.

I spent a few hours on that radio, makes me kind of dissapointed.

Who can help me?
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bruce
Posted on Friday, August 22, 2003 - 9:57 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

does the display light the meter work can you see it move with a strong station near by?????
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Alsworld
Posted on Friday, August 22, 2003 - 10:14 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Was it ever hooked up backwards (+ & -)? Diode near where the power comes in may be blown.

Just a internet thought.

Alsworld
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Taz
Posted on Friday, August 22, 2003 - 10:33 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Yes Alsworld it was, and I clipped the resistor that burn out and never replaced it.

It lights up, and wont hear my station at all.

The meter WONT show any activity in any mode swr/rf ect.
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Adshar64
Posted on Saturday, August 23, 2003 - 8:49 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Retune the vco coil for lock.
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Seymourduncan
Posted on Wednesday, August 27, 2003 - 9:15 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

i have a 21 ltd thats doing the same thing
meter dead keys at 3watts and when i speak it goes backwards,,,,,, someones thoughts
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Seymourduncan
Posted on Wednesday, August 27, 2003 - 10:11 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

what is the thing beside the power supply is it a resistor or a diode the 1 on this 21 is burned out thanks