Cobra 139 XLR issues

[Zman]

No carrier on Am and the relays chatter on SSB.

 

[ExitThirteen]

Replace C179. It's a small blue tantalum capacitor over by the final section of the radio. It's a 2.2 uf 25V capacitor. Replace the tantalum with a same value (2.2 uf 25~50v) electrolytic capacitor. That should fix the problem. Common issue in the old D858 AM/SSB chassis. Let us know how you get on.


~Cheers~

 

[2RT307]

I am pretty sure that's what fixed mine that had the same problem. Nice rigs, too!

73,
RT307

 

[Zman]

Its working fine now!! that was the problem.

 

[Zman]

I'm running it with a Turner plus 3 old Grey version and it BARKS on SSB!!!!

 

[ExitThirteen]

Glad it's working for you. Enjoy!



~Cheers~

 

[2RT307]

They really are solid on sideband, and loud in either mode, SSB or Am. Mine is unmodified, and one of my favorite old rigs to play on. I usually pair it with a KLV tube amp, and make lots of DX contacts. I am told they have a compressor built into the mic circuit, so just about any mic sounds great on them. The Turner really kicks it up a notch! Glad you got yours fixed, like I said, mine had the exact same problem.

73 and good DX,
RT307