Quad 44

[Western 91]

Hi Members. I have a Quad 44 preamp which as a selector board with number 2090-1 it's in the grey model with a high serial number. This board is not mentioned in the Quad 44 service manual. I will be grateful if any member can supply me with a circuit for the mentioned board, the board as two Intergrated circuits as apposed to three in earlier selector boards.
Best Regards Western 91

 

[ejp]

See PM for a link. But it's not clear which board you mean. The selector board has no op-amps on it at all, only 4x4066 switching ICs. 14 pin, and this never changed. The tone control board went from having 4 single opamps to 5 duals. And there are no boards that ever had 3 op-amps on them.

EJP

 

[Western 91]

Thank ejp for your reply. The board I am talking about is the board with the selector switches on the front panel. The two chips are MC14174BCP.
Regards Western 91

 

[ejp]

Ah that one. I've heard of the MC14174BCP version but never seen it, and I've serviced quite a few 44s. Never heard of a problem with the logic chips either. Good luck with it. I think you may find the MC14174BCP easier to source than the earlier ones.

EJP

 

[405man]

I have a copy but I am not at home at the moment, I will look it out on Monday

Stuart

 

[Western 91]

Hi Members thank you for your replies. I have sorted out the Quad 44.

 

[UserAbuser]

Since this board seems to be a rare beatsie, it would be nice if you could post a few pics of it and whatever diagrams you have for others to drool over