Phase 45 vero layout/ with JC mods switch help needed!

[finkfloyd]

Hi, just spent 4 hours building this beauty, everything is put together except for the led, and phase/univibe mod switch.

Can I use a 3dpt foot switch for this, and which way would it be wired?

I also havent matched the JFET's yet, I will look into that later. I also socketed the 2 IC's and 2 trannies just incase.

Thanks in advance!

[finkfloyd]

well ive just wired it up, and something is definately wrong everything on the board, pots wired ok, I think it is the switched for the on/off switch, I used standard true bypass method http://www.generalguitargadgets.com/diagrams/switch_lo_dpdt_std.gif but omiting the first column of lugs on a 3pdt switch .

Im getting weird sounding whitenoise, and screaming, Led stays on , does not blink, the sound is reminescent of an old sinclair zx spectrum spectrum loading up something. sounds like a motorboat when turning the mix knob

Any idea whats wrong here?

Thanks

[tiges_ tendres]

the sound is reminescent of an old sinclair zx spectrum spectrum loading up something.
Thanks

Sounds great! post a schem of that so we can all play manic miner and jet set willy with our stompboxes.

I dont think you are supposed to omit the first column of polls on the switch, perhaps you could post a picture of the wires and when they go from and to?

[finkfloyd]

Hi, heres a pic, I must admit im quite new to this, and switch wiring isnt my favourite part about building, so this is probably the problem, heres a pic




EDIT: I have tried cutting along the strips on the veroboard to make sure nothing is touching, swapping IC's , changing the 2N5458's, i believe the bypass switching is correct, but i dont know if the vibe mod switch is correct.

The only thing I have done different on this board was use 1 metal film resistor for R24 (2K4) and use a 3M3 instead of (R18)3M9 as I didnt have a 3M9.

Update : forgot to add a jumper by the 2 polar caps, 150k resistor next to this was blown, replaced & LED still not blinking, effect not working still, motorboating gone, unless switch wires are joined together which is a lot queiter now....

All resistors now check in OK, measured all with DMM all are ok, some 10ks, are reading only 5k, but surely this thing should fire up....

[finkfloyd]

Come on give me a break someone must know ;

I've searched the forum and read and researched everything I can to the best of my ability.

[finkfloyd]

Got the LED working, and a distinct phasing, but sounds like siren....rather doorbell sounding, I give up, it has defeated me. this is not how it should sound, i dont have any guitar signal...

A word to others who build this, be prepared to build it again, and dont expect much help, other than the text found already on this forum...