I intend to make the mixer part of this module in eurorack and just for fun (and aestethic) I plan to put slider pots instead of standard level knobs (the panning CV and level will still be knobs).
But as I’m looking to get all the components I need, I cannot find the 250k log pots anywhere… I’m then wondering why Yusynth has choosen this type of pots, is there any good reason to follow the schematis to the letter ?
For other mixer I made, I’ve used basic 100k linear pots, does it change something if I used those 100k slider pots (which are easily available) ?
When I will have all the components, I plan on printing my own circuit on copper, we’ll see how it goes
It’s an attenuator with no fixed resistors in series. So there should be no reason you can’t replace it with a lower value — higher value could be problematic but lower is OK. Log or linear is up to your taste. So linear 100k should be fine.
Thanks a lot for your answer, I will do that then…
Now, just to know, how does the VU meters work in the circuit ? In the schematic there is no information on how to connect it… (and what if I was to put just 1 VU to check it in mono? Is that doable ?)
I see that Vumnoo has done the module… Any advice to complete the module ?
If you are hesitant to decide between log or linear pots, then maybe read Controlling Volume—log pots and/or The secret life of Pots. And if you still do not know what to decide you can use the parallel resistor trick and add a switch between the parallel resistor and the potentiometer. That will give you the flexibility to choose for a linear or pseudo logaritmic response.
you can posisbly use 100k log pot and on tab 3 add a 150 k resistor the what would go to tab 3 goes to the other end not soldered to tab 3. So your meter would see 100k + 150k = 250k basically and there you go 250k, and since using a log pot you should be good. I have done this for 1k pots needing to be a 1.3 k rating. Good luck and we are here to elp not hinder qauetions
The VU meters connect to the output/monitor board - the connections are shown on the original circuit diagram and board layouts. You could create a mono signal to monitor by using an op-amp stage as an inverting mixer but this would mean that you could be significantly overdriving one channel even though the mono signal was still within limits. And a stereo meter means you can check the panning is working as expected.
