Cobra 146GTL hi fi

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Goldfinger
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Cobra 146GTL hi fi

Postby Goldfinger » Wed Feb 28, 2018 5:04 pm

Receive:
C25,C29 change to 2.2uf mylar, polypropylene or non-polarized electrolytic
C142 to a 2.2 or 4.7uF electrolytic or tantalum, observe polarity
C138, C139 Change to 4.7uf mylar, polypropylene or non-polarized electrolytic
Change C132 to a 1000uF, 25 volt electrolytic, observe polarity
More highs? Make C137 lower in value

Transmit:
Change C129 and C118 and C112 to 4.7uf mylar, polypropylene or non-polarized electrolytic
SSB bass? change C111 to a 2.2uf mylar, polypropylene or non-polarized electrolytic

Direct inject:
Inject through a 10uF into the C112 end of R208 with the + end towards R208 (if you want to leave it so the mic jack still works on AM)
Alternately you can pull C112 and inject through the 10uF into the R208 end of the C122 holes with the + towards the board.

This should also work on a PC244 hifi
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