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[ATTACH=full]62094[/ATTACH]

[ATTACH=full]62095[/ATTACH]

Most likely culprit is C117 next to L3 is shorted. But, can be any of the other red circled items, too, these are either tied directly to, or low resistance to the PTT line of the Mic socket. last time I helped someone with a Cobra 29 a few months ago, that had TX all the time, it turned out to be a cracked (shorted) C121 up by the mic plug area.

[ATTACH=full]62096[/ATTACH]
Parts side

[ATTACH=full]62097[/ATTACH]
Flipped to Solder side

[QUOTE="NZ8N, post: 807904, member: 51368"] [ATTACH type="full" alt="C29 LTD Classic PTT path.jpg"]62094[/ATTACH] [ATTACH type="full" alt="C29 Board Layout TX all the time.jpg"]62095[/ATTACH] Most likely culprit is C117 next to L3 is shorted. But, can be any of the other red circled items, too, these are either tied directly to, or low resistance to the PTT line of the Mic socket. last time I helped someone with a Cobra 29 a few months ago, that had TX all the time, it turned out to be a cracked (shorted) C121 up by the mic plug area. [ATTACH type="full" alt="C29 TX C117.jpg"]62096[/ATTACH] Parts side [ATTACH type="full" alt="C29 TX C117 flipped r-l.jpg"]62097[/ATTACH] Flipped to Solder side [/QUOTE]

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