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TIMTAPE · 20th Mar 2009, 9:11 pm

I've noticed my A700's playback noise is a little higher than my A77 and B77.
Unlike their discrete transistor design it uses an IC, TBA 931 - 3. 14 pin DIL. The PCB has + and - 12v rails.

I couldnt find much info about it on the www. Does anybody know if there is a replacement IC? Perhaps a more modern and lower noise type? Not sure how common is the 14 pin.

Any help appreciated.

Tim

20th Mar 2009, 9:11 pm	#1
TIMTAPE Octode Join Date: Jul 2006 Location: Perth, Western Australia Posts: 1,969	Revox A700 repro IC I've noticed my A700's playback noise is a little higher than my A77 and B77. Unlike their discrete transistor design it uses an IC, TBA 931 - 3. 14 pin DIL. The PCB has + and - 12v rails. I couldnt find much info about it on the www. Does anybody know if there is a replacement IC? Perhaps a more modern and lower noise type? Not sure how common is the 14 pin. Any help appreciated. Tim