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Cobra 139 XLR issues


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~
 
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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
 


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