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Reducing hiss by changing op-amps ?
Hi,
I have an audio mixing desk from the 80's that is a bit 'hissy' (i.e. background noise with no inputs). Would I be able to reduce this by replacing the op-amp ICs with lower noise versions ? ...or is this sort of noise nothing to do with the op-amps ? I have obtained and scanned the schematics, in case anyone fancies a quick look. It's only a 1Mb PDF file, located he- http://homepage.ntlworld.com/anengin..._Schematic.pdf The vast majority of the op-amps are physically labelled:- '4558 DD' ' JRC ' ' 1266B ' I'm presuming these were made by the Japan Radio Company. (The schematic refers to them as 'TA4558NB') The desk incidentally, is an 'INKEL MX-1410' made in Korea. Any help would be very much appreciated. Cheers, Kev. |
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