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Old 18th Oct 2020, 9:49 am   #12
DMcMahon
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Join Date: Apr 2019
Location: Worthing, West Sussex, UK.
Posts: 2,381
Default 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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