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All it needed was a new 45, because of how the bias circuit works the bad tube threw off the bias for other stages. Now after touching up the alignment this radio is hot! No antenna connected and it gets stations from 300km away no problem. Any sort of antenna will overload the radio with local stations... This thing is like a stethoscope, I wasn't expecting it to wake up so well! I experimentally adjusted the value of the tone control cap to just remove sibilants without ruining the sound quality, the original value was way too high.
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03-30-2016, 08:02 AM
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