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Old 20th June 2009, 08:22 PM   #1
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Join Date: Jun 2009
Post B77 noisey recording

Hi,

I recently get a revox b77 mkii. The heads look pretty clean, un-used almost. I was trying to set it up but don't understand why everytime I make a recording, it always turns out very noisy, filled with these seemingly random scratches. Here is a link to the sample of this problem, please have a listen and advise.

http://rapidshare.com/files/246762369/Noise01.mp3

Regards.
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Old 24th July 2009, 10:46 PM   #2
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I have changed all the capacitors on the Record amp pcb, and also the input amp. Still the noise persist.... Here is a new sample of this scratchy behavior, please any B77 experts, chime in, your help is much needed... Another strange behavior of the unit is that most times when I turn it on and there is a tape loaded, it automatically starts playing.

Link to b77 scratchy sample: http://rapidshare.com/files/259675307/B77_Noise.ogg

Regards.
mc
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Old 24th July 2009, 10:46 PM   #3
diyAudio Member
 
Join Date: Jun 2009
Default More samples

I have changed all the capacitors on the Record amp pcb, and also the input amp. Still the noise persist.... Here is a new sample of this scratchy behavior, please any B77 experts, chime in, your help is much needed... Another strange behavior of the unit is that most times when I turn it on and there is a tape loaded, it automatically starts playing.

Link to b77 scratchy sample: http://rapidshare.com/files/259675307/B77_Noise.ogg

Regards.
mc
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Old 12th April 2011, 02:36 PM   #4
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Join Date: Apr 2011
I've had the same problem. It turned out to be the relays on the oscillator board. (relay contacts worn/dirty?).
A new oscillator board cured it.
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