My easyvibe weirdness

[zhx]

My easyvibe is acting weird.

I built it a couple of years ago, and used for a while. Then the lfo stopped oscillating shortly after plugging the power cord (the leds are lid up, but wont flash). I tried to debug it with no result.
Last week I picked it up to try to fix it at home. Powered up and it worked! I left the lfo on for an hour or so, and the leds were still flashing.
So I took it back to the studio, and once again ...it won't work.

Is it possible that this is a power supply issue? At home I have some no-name supply, and at the studio a 1spot.

im using this layout:
http://www.aronnelson.com/gallery/main.php/v/slackers-stuff/easyvibeboard_final.jpg.html

[richon]

try it with a 9V battery to be sure.

[idiot savant]

off the shelf wall warts are usually outer(-) negative/ center(+) positive. The 1spot is center(-) negative!

Lets hope you are lucky and didn't fry anything!

[zhx]

off the shelf wall warts are usually outer(-) negative/ center(+) positive. The 1spot is center(-) negative!

Lets hope you are lucky and didn't fry anything!

Not a polarity issue. As I said, it works partly with both power supplys; for a few seconds with the 1spot and fine with the of-the-shelf wall wart.
The problem seems like a bad cap the doesn't charge up and discharge, but only lets current through, but I don't understand the difference between home and the studio? For the sake of te argument, which of the caps is responnsible for the LFO pulsating? Just to make sure.

[GibsonGM]

I had a couple of issues with solder joints on the underside of the board contacting the wah shell I put it in...a few layers of cardboard and duct tape, and there ya go!   Maybe you're having something like that happen?

[zhx]

I had a couple of issues with solder joints on the underside of the board contacting the wah shell I put it in...a few layers of cardboard and duct tape, and there ya go!   Maybe you're having something like that happen?

I had that problem at first, but I rehoused it and applied the duct tape method a while ago, so that's not the case either. I'll check the solder joints through though.

[artsinbloodshed]

speaking about weirdness,I used the same vero layout (slacker's ) and all is glowing/functioning except that...either I have just the guitar sound with no modulation or no sound at all (whether i'm in trem or chorus mode)...

[petemoore]

  They do that. the two that I tried.
  Tonight Easy Vibe was being used after being ressurected again for so long.
  Major errors corrected a couple days ago, then I wanted to try the 'speed boost' for the rate knob.
  Plug in = no LFO ~, battery = LFO,
  the other plug in [plug outputs are all 7809 regulators, and work with 9v neg pedals/circuits] + no LFO.
  So...yea, it does that.
  Perfboard, very ugly hair wrenching overbug [basically fine tooth combed the entire thing, thrice...happy successes met with confusion. Had the bug again, definitely a PS-no Vs. battery Yes deal.
  The other one I think was messed up somehow and I have a recording of it on cassette somewhere, it had a wild wobble [I haven't ''uni'' tized the staging cap values, just stuffed .01uf / .1uf / .047 in all the empty sockets so that might be it, the other one was fat wobble to it, almost too much wobble for certain speeds.
  It had always yes/no'ed on the PS finicky deals, and almost eventually ended up with an LM317 regulator on it. The regulator did the trick sometimes but then it still needed 'blipped' [turned off and on or snappy regulator adjustment back to...
  So I put a regulator 'blipper' switch on there too ! It'd drop and bring voltage right back up and this reliably brought the nice deep wobble back in. For about 30 seconds at which the 15 to 25 second fade of oscillation would be taking it down to phase filtertone, but no sweep.
  I liked that quite a lot, nice to have a fading oscillation, one blip [wouldn't kill power, just drop it low enough to 'kick' the LFO without much signal dropout] is good for about the right amount for a time.
  Then that didn't work either...