4MS Stereo Panneur Questions

[jmasciswannabe]

I want to build this for the cool panning function but do not have interest in two separate trems doing different things in stereo. It's cool, but not something I would probably ever use. I want to be able to put it in a 1590b and not have knobs all over the place and am trying to think of ways to save space. Can I just have the one LFO control both LED/LDRs and remove the second lfo and sync switch completely, or is it necessary to have the other lfo to do the panning?

I am thinking of using a 4pdt with millenium for the stereo true bypass. Any other suggestions?

Here's the schem:
http://commonsound.org/panneur/pannerschematic.pdf

Thanks!!

[Seljer]

Yep, you just leave the right LFO section (the stuff around the potentiometers labelled RSPACING, RSPEED and RFINE) and wire the 'Sync' switch to be permentantly connected the the left LFO 

That opamp at the bottom right takes care of the functionality that enables it to do either stereo tremolo or panning.

[jmasciswannabe]

Cool. That's what I figured, but never hurts to ask. I think I will try and use a dual 1k pot to control both depth controls as well as dual 100k for the gain. Hopefully the values of the independent pots will be close enough not to cause an audible difference! So, it looks like a total of five controls (space, speed, smooth, dual depth, dual gain) and three switches (trem/pan, speed select, ramp up/down.)

Shouldn't be too difficult to fit into a 1590BB. 

[[WZ]]

Hi!

Sorry to revive zombie-thread, but, did you ever succeed?

I'm having problems getting the inverted signal out of that PAN-stage OpAmp.
When in STEREO TREM mode the LED is fine, but when in PAN mode the LED never gets bright enough..

Any suggestions? Beer for the winning tip!

[Fender3D]

You may alter RR16 and/or RR17 to alter U4a's inverting (pan mode) gain.

EDIT:
sorry I didn't read the other threads where you listed your trying...

Anyway, switching op-amp's inputs should work...
try adjusting R16 and R17 (they should be the same value) to avoid any input impedance issue (they will fight against "smooth" pots)

[[WZ]]

Thanks for advice,

I've tried adjusting ONE of them, to increase the gain, but not both to battle impedance.. Gonna try that!

In the mean time, I found this truely glorious snippet of circuitry: https://www.diystompboxes.com/smfforum/index.php?topic=29374
It looks almost too simple to work, but reading about it it makes sense and might actually be good to try...