Cobra 140 gtl Bias issue

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geno2
Mudduck

Posts: 5

Cobra 140 gtl Bias issue Jan 31, 2023 1:30:34 GMT -5

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Post by geno2 on Jan 31, 2023 1:30:34 GMT -5

I have a re-capped cobra 140, None of the ceramic caps were replaced. I can't get the driver bias down below 70ma. The final is set at 45ma. Driver is a NEC 2SC1306 and final a NTE 236. I tried a NTE 235 as a driver and same issue. TR38 is good. Any ideas?

Thanks