My Revox PR99 II has been running beautifully but now is creating a lot of hiss on playback. No hiss when monitoring thru SOURCE, only on REPRO. Demag-ed, cleaned heads, the machine is biased correctly, switched out tapes, etc. It's even on both channels, and there is some very low-level, dark random popping on the right side only.
I've opened it up and don't see anything obvious like a blown cap (I'm thinking the power supply, since it's the same on both channels).
the unit has not been recapped and was sitting in storage for a long tim,e before I got it and started using it about 3 months ago. Up until now it has been performing beautifully.
Glad to be new to this forum, and thanks, in advance, for any insight,
David