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Convert Tube Mixer / Direct Outputs
Hey all. I have a Bogen 5 channel tube mixer that I want to modify. I
understand a summing amp doesn't actually add any gain, it just summs. I'd like to take 4 of the channels and give them each a direct output. I don't have a schematic( I tried!), but it seems like they each go from the input, to a transformer to a tube(2 channels share one tube, which I beleive is normal as they have two sections each) to a fader, and then I think the summing amp. Could I just tap into them post fader to get direct unbalanced outputs at line level? From what I've been told this should be pretty easy. And perhaps use a switching jack like in a patchbay, so that without a plug in the direct out jacks, it would be normalled to the summing amp. Anyone have any ideas? Thanks! |
#2
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Convert Tube Mixer / Direct Outputs
Andrea Zavareei wrote:
Hey all. I have a Bogen 5 channel tube mixer that I want to modify. I understand a summing amp doesn't actually add any gain, it just summs. I'd like to take 4 of the channels and give them each a direct output. I don't have a schematic( I tried!), but it seems like they each go from the input, to a transformer to a tube(2 channels share one tube, which I beleive is normal as they have two sections each) to a fader, and then I think the summing amp. Could I just tap into them post fader to get direct unbalanced outputs at line level? From what I've been told this should be pretty easy. And perhaps use a switching jack like in a patchbay, so that without a plug in the direct out jacks, it would be normalled to the summing amp. Anyone have any ideas? Thanks! I used to own a Bogen Mic Mixer (LM I think). They actually have quite a bit of gain, I used it to drive power amplifiers -- which in the early 70's were not that sensitive. Your best bet is probably to tap off of the inputs of the individual level controls. Mike McGinn -- Mike McGinn |
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