Low freq noise - Tape machines

Joelistics · 7th February 2012

Hey there,

So my Revox A77 (XLR ins and outs) is starting to get a little noise over the years and has become unusable for critical work.. I want to change that.

problem #1

I get these occasional pops up to -50dB (every ca 20 sec irregularly). They occur in both channels and are between 20-300 HZ

problem #2

When reusing tape i get a bit of muffled (lf) bleed at around -70db from the last recording.

Any suggestions would be welcome, thanks

Joel

Mr. Tom · 7th February 2012

Has the unit been recapped?
Has the headstack been relapped?
Has it been properly demagged and aligned?
Biased properly?
Erase current adjusted for maximum erasure?

Best,
Tom

Bill@WelcomeHome · 7th February 2012

sounds like a cap discharging.

Get a bulk tape eraser. The big platter kind, not the one that looks like a Chinese iron.

7th February 2012	#3
Bill@WelcomeHome Lives for gear Joined: Feb 2010 Posts: 4,185	sounds like a cap discharging. Get a bulk tape eraser. The big platter kind, not the one that looks like a Chinese iron. __________________ "We have a situation where somebody has learned that 'tape' sounds good. Tape doesn't sound good. Tape sounds like crap. But sometimes good stuff gets put on tape." "Putting crap to tape...sounds like crap." Show business: we're all here because we're not all there. Resistance is not futile. It is voltage divided by current. "I do not think that the wireless waves I have discovered will have any practical application,..." Heinrich Rudolf Hertz

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7th February 2012	#1
Joelistics Gear maniac Joined: Nov 2010 Location: Copenhagen, Denmark Posts: 197 Thread Starter	Low freq noise - Tape machines Hey there, So my Revox A77 (XLR ins and outs) is starting to get a little noise over the years and has become unusable for critical work.. I want to change that. problem #1 I get these occasional pops up to -50dB (every ca 20 sec irregularly). They occur in both channels and are between 20-300 HZ problem #2 When reusing tape i get a bit of muffled (lf) bleed at around -70db from the last recording. Any suggestions would be welcome, thanks Joel __________________ www.sixbitdeep.com Six Bit Deep on Facebook

7th February 2012	#2
Mr. Tom Gear addict Joined: May 2006 Location: Stockholm,Sweden Posts: 430	Has the unit been recapped? Has the headstack been relapped? Has it been properly demagged and aligned? Biased properly? Erase current adjusted for maximum erasure? Best, Tom