DEMO Duo-Phase-ivibe

This post contains an audio or video demo

DGWVI

Well-known member
Build Rating
5.00 star(s)
After a week or two of troubleshooting this, it turned out to be a pad I'd burnt out, so I jumpered the effected traces, et voila!

Anyway, this one's got quite a few mods (most apply to both sides)-
  1. R1 increased to 470k, because a lil higher input impedance isn't gonna hurt
  2. R7 decreased to 4.7k for more feedback, and the potential for self oscillation
  3. R29 is 470r, as I don't have any 560r
  4. R32 increased to 150k
  5. R34 increased to 1k (to prevent stalling out the LFO)
  6. R35 decreased to 10k
  7. R36 increased to 100k
  8. R37 increased to 1k (again, no 560r)
  9. C6-C11 changed out for staggered cap values, taken from UniVibe type circuits - 47n, 4.7n, 470p, 150n, 15n, 1.5n, respectively
  10. C13 increased to 1n for a bit more high roll off
  11. Rate pot is now 1MA
  12. IC6B is TL022
  13. LDRs are 9203, LEDs are diffused Ultrabright reds
  14. Trimpots mounted externally
  15. TR2 is 2k, as I am out of 1k in 9mm
  16. Toggle switch added as a dry-kill (disconnects R30)

Rs32-35 were changed out to effect the range of the LFOs speed- it now goes both slower and faster than stock. Values were chosen based on Ken Stone's Utility LFO, with some minor tweaks.
I had an extra hole in the enclosure, so I used this as a speed range toggle for side A- it swaps between 470n (stock), 150n, and 1u. So, this side gets both slower and faster still.

Used the intelligent relay boards because I have a bunch of em already populated, just sitting around

orca-image--1070591267.jpeg orca-image-852750121.jpeg

Excuse the playing, I haven't picked up my guitars in about two weeks


As always, if you need some whooshies in your life, I really can't recommend this circuit enough
 
Last edited:
Back
Top