Re: Sound Belle reel-to-reel heads
Are you measuring the Record Bias/Erase signals using an oscilloscope ? If you have a scope then you could monitor the record signal and make sure it is getting through to the head.
At the head itself the record audio signal is modulated onto the much larger record bias signal so can be difficult to see. Similarly when replaying a tape (that has a recording on) you can monitor the playback signal.
David
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