I'm looking for a supply of S-taper, 10k pots with a minimum life cycle of 100,000 rotations.
Has anyone encountered these?
Has anyone encountered these?
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Show posts MenuQuote from: jimilee on May 03, 2022, 08:07:16 PMQuote from: Aentons on May 03, 2022, 07:27:15 PMMy thought process is, it does what he is looking for, so he could at least see the schematic of the implementation.Quote from: jimilee on May 03, 2022, 02:06:03 AM
Does anyone have an original Klein bottle schematic?
Peter sells the download of it on the VFE site so I'm not sure he wants us passing it out. I'll tell you.. it's a real nightmare, especially all the mixing stuff
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Quote from: Aentons on May 03, 2022, 07:18:59 PM
It's a non inverting stage so it won't go below unity, but if you convert it to inverting it will go below. You could then take out one of the two inverting stages after it.
I'd just wait to see what Brian comes up with. I'm relatively new at this stuff, he's a real pro
Quote from: Aentons on May 03, 2022, 06:50:47 PM
I'd bet that hiss you hear is partly from the gain set so high on the return opamps. You might need a quieter opamp if you are going to set the gain high and then have the volume after. The high value resistor noise will compound it. You could move the pot to the feedback loop (R20 and R28) to control the volume
Quote from: madbean on May 03, 2022, 12:47:56 AM
First check for any DC readings @ R16/17 and R6/R8 (alternate the switch state so you can check both when they are not in a ground state. If there's no DC reading from step 1, maybe put 1M resistors b/w lugs 1&2 (brown wire, ground wire) and lugs 3&2 (orange wire, ground) to see if that reduces the pop.
I'm not sure about you noise issue. I would audio probe U2A and U2B pins 3 and 5 and compare noise against their respective output pins 1 and 7.
You also probably don't need R5, R22 nor R30.
Quote from: madbean on May 03, 2022, 01:58:18 AM
A few other things I noticed:
You should really reconsider re-balancing the entirety of resistor values you've drawn here. Most of them can be reduced greatly (even eliminated) without compromising the signal integrity. The advantage of doing that is lower resistance values can reduce noise. If I have time, I'll re-work your schem with my suggestions tomorrow. I think your idea is great, it just needs a little finesse. I haven't quite gone through all the switching yet.