Thanks. I’ll be on the look out for a replacement vactrol!

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I found some replacement vactrols on eBay for very a reasonable price. Thanks for the schematic. Having the part number made it easy.

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I got myself a DPLPG yesterday and sadly I had to start searching web knowledge on why Maths unity outs did not work. Ended up here and want to ask if someone can explain why this is happening and if there’s something to ‘fix’ it without workarounds, buffered mults, attenuated outputs on Maths etc.

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It’s a known issue with the maths circuit (and the classic function generator circuit it is based on) when used with a passive lpg. I don’t understand it fully but I believe it has something to do with impedance?

The direct outs of channels 1 and 4 if maths are unbuffered while the scaled/combined outputs are.

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With Rampage I found that even a passive attenuator would fix the problem.

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Yes, I’m having the same problem. A byproduct of it not drawing power? Any workarounds?

I have the same question

My solution was to patch from the attenuated outputs of Maths. That solved it. From what I understand this is something that happens to all DPLG / Maths. Not faults in ours. It’s got to do with how electronic circuits work, that’s where I left the issue.

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