One post, One component - An experiment

[phector2004]

Update:

It works!

Substituted
1) 2SK117 for the FET (doubt it changes much, as the gate isn't connected!)
2) Cable TV booster power transformer's secondary (low voltage side) for 470mH
3) Didn't bother adding 0R resistor

I also swapped a 1M for the 470k resistor to Vref at one point, as I had mistakenly put a 4.7k resistor and was not understanding why the volume was so low 
Sounds "fuzzier" than with the 470k... Going back to the original circuit, there's something funny going on when I play the high e and b strings... Don't know how to describe it and unfortunately I don't have the equipment to record, but its almost like really really fast, shallow vibrato?

Might mess around with this some more later, maybe breadboard the LFO as well

[bean]

How about....

[artifus]

--> lfo in --> led(s) -/-> ldr(s) --> ?

[phector2004]

I like it!

I even have a DIY vactrol leftover from the tiny tremolo.

The 10n cap didn't do much going to ground, removing it gave a tiny bit more treble. I wonder what hooking it up to the emitter will do?

[phector2004]

Ok this is driving me nuts:

Set it up with an LFO-controlled LED/LDR, from 10n to emitter. Sounded like a very shallow tremolo, so I upped the 10n to 47n and it became more pronounced. Then I tinkered with the bias and added a loud, distorted signal, and it started doing the strangest thing... sounded a like a harmonizer/octave down/ring mod. Something of the sort.

And then it went away, so I rebiased and there it was again!

And now I've lost the effect completely, and I have no clue as to why it was there in the first place... any ideas??

[bean]

Up the cap to 100n and change the emitter resistor to 4k7. You should get some vibrato like the Wobbletron (well, who knows in the context of everything else that's going on in this thing).