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Old 21st Nov 2022, 6:29 pm   #5
Analogue man
Hexode
 
Join Date: Dec 2020
Location: Raunds, Northamptonshire, UK.
Posts: 339
Default Re: Revox A77 doesn't erase

Quote:
Originally Posted by mole42uk View Post
The record & play heads have been out of this machine and lapped. And tested for continuity and impedance.

Tests today include cleaning the erase head. If I set the machine to record with no input signal the previous sound on the tape is audible but at a much quieter volume than if I play a section that hasn't been through the erase section. I do not know what machine this tape was originally recorded on. I suspect that the erase head is functioning but possibly with less power than needed but the oscillator signal at the erase head is present and at the correct voltages. Tape looks like polyester, in an EMI box and wound on a Grundig 7" reel.
Then I suspect that the machine is working correctly, although the erase head could still be dirty, even if it was lapped which I somehow doubt. I would go with TIMETAPE's comment as I have had that problem with my A77.
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