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I’m working on a 1976 Motorola car radio as used in Canadian Volvos, Triumphs VWs, and John Deere Tractors etc.. It has an odd 4 pin chip used in place of the Audio Frequency Driver transistor
I’ve attached a picture.
One lead of the chip is connected to the base of the 2N176 Germanium PNP output transistor. I have two of these radios radios and the chip seems to be bad in both of them.
Any help identifying the chip or finding a replacement would be appreciated.
This is a Motorola MFC4050 audio integrated circuit, discontinued long ago. Hope you can find some supplier that still has them.
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