Hi, I have an altec 1592A mixer that I would like to add to it direct outs from each pre amp.
I'm thinking to mod the music / speech switch, remove the 1uf cap and use this switch to select if the signal from pin 1 of the 1588B will go to the direct out jack or go to the master channel.
Here you can see what I've done with one of the channels:
It seems to work well but there's one problem that I don't know how to solve: when the modded switch passing the signal to the direct out jack there's a leakage of the signal going to the master channel at the same time...
I was thinking that is coming from the channel pot but it acts the same way also when I disconnectedpin 1 of the 1588B from the 750 ohm pot, so it seems like there is a connection from the 1588 socket to the master channel that I cant find.
Please advice, what else should I check ?
Here's the schematics of the 1592A and the 1588B
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I'm thinking to mod the music / speech switch, remove the 1uf cap and use this switch to select if the signal from pin 1 of the 1588B will go to the direct out jack or go to the master channel.
Here you can see what I've done with one of the channels:
It seems to work well but there's one problem that I don't know how to solve: when the modded switch passing the signal to the direct out jack there's a leakage of the signal going to the master channel at the same time...
I was thinking that is coming from the channel pot but it acts the same way also when I disconnectedpin 1 of the 1588B from the 750 ohm pot, so it seems like there is a connection from the 1588 socket to the master channel that I cant find.
Please advice, what else should I check ?
Here's the schematics of the 1592A and the 1588B
[