I recently picked up an NOS AVA kit from many years back. It includes an upgrade to an SA-300 Central Lab selector switch. The switch has two decks and the stock one had three. Would this make it possible to eliminate some other switches?
My plan is to eliminate the tone controls and the slide switches except for power, of course. I would also like to do away with the blend switch. Is this easy to implement? I noticed that it was connected to several other components.
Cheers, Greg
I think that the two-deck switch was used because it was readily available, higher quality than the stock switch, and less expensive than having an exact replacement 3-deck switch made. People no longer needed the phono and tape head EQ functions that were common when the PAS was originally designed, so there was no need for the more complex switch and setup.
The tone controls were not used in the SuperPAS series preamps that I saw.
The blend switch had no effect when it's in the stereo position, so I'm not sure why it would need to be removed, unless the switch is in really bad shape. Have you tried cleaning it with some Caig Progold?
Isn't the tape monitor switch one of the slide switches? It's been a while since I looked at my SuperPAS, and even longer since I hooked up a tape deck to anything.