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Recent content by victorlad
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FT-840 and 2SC2879 HG
These HG 2879s probably have slightly different input/output impedances the the original Japan 2879s. I was thinking I could play with the value of C5019 and C5020. But I'm not a RF engineer. I could install variable Caps and peak the outputs then replace with fixed ones. Of course the input... -
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FT-840 and 2SC2879 HG
I didn't test that one specifically but I try an additional one on Pin 5 of JP5001. It was a 1000uF electro. It did reduce the feedback a bit. Maybe 25%. -
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FT-840 and 2SC2879 HG
Hello. Working on a 840 that had blown finals. Replaced drivers and Finals. Bias the matched HG 2sc2879 with 200 ma. 100 ma each. Has good output but the is RF getting into the radio from the 13 volt rail and bleeding into the AF. I am assuming they are not perfectly matched causing the issue...