Re: Head changes on a Revox PR99
Are the two heads half and quarter track, maybe? Revox pattern heads were made in full track, half track, quarter track and occasionally butterfly (narrow guard band half track). Examination of the head face should show you the track layout. The other thing to watch for is that replacement heads were made in this form for the valved 36 series machines, and you may have one of these. Somewhere I have a list...
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