Improved EA Tremolo

[duck_arse]

the best advice on the ea tremolo, original or improved, is to buy yourself a breadboard. ESPECIALLY if you're going to have a swing at the superfuzz. the breadboard will stop you taking the other kind of swing, and you can try and hear any version of the circuit you can find.

and then you can try a big muff. and then a tubescreamer. etc. etc.

[pauldumbell]

Well folks,
I did it. I went down into my workshop dungeon DETERMINED to not be daunted by this seemingly easy project. I built the GGG version twice, the tonepad version once, and then I decided to try the runoffgroove version, but at the last second opted for a version from a gentleman on this forum. Paul Marossy to be exact. Basically because the pcb looked a bit roomier. I scavenged all the bits from my bin and set off at high noon. Etched the new board, and it took longer to scrounge the bits from broken phones, TVs and so forth than it did to populate it. First thing wrong is that i wired the pots backwards, everyone draws up layouts differently I suppose. Still no tremolo. Then I thought to myself as I came up the stairs with my head hanging in defeat 8 hours later...what is the ONLY thing that I used from the other failed attempts. The FET. The damn FET. I measure it with my transistor checker and it shows up as OK. Bunk says I. I unwrapped a brand new one pop it in and WAWAWAWAWAWAWAWA! Tremolo, finally. I DID IT! I cant believe how stupid I was to trust the simple transistor check. Just because it isnt fried doesnt mean that its at full functionality, and those radio shack mpf102s were sitting right in front of me the whole time. My verdict. when I built the first one, I cooked both of the fets with a unwanted bridge, and I kept trying them in the new builds. Lesson learned. It only cost me 3 pots a DPDT and a hammond case, which I could probably hammer back into shape. I am so happy! Like to thank you all for your support, and a big salute to Paul Marossy for the roomy PCB. Im sure Ill be starting a thread in a few days when my superfuzz doesnt work. Im hooked now.
Rock on!
Paul

[bluesdevil]

Congratulations!! Glad you didn't give up..... feels good when they fire up, don't it?
Good luck on yer Superfuzz!

[GGBB]

Yay!!!  And good on you for not giving up.

[duck_arse]

let us know what breadboard you decide to buy, and we want photos of the wrecked/revived case when it's finished. you can even claim that as repurposed, I think.

and well done.

[midwayfair]

Man, it always sucks when it's a bad part! Glad you got it working.

[Paul Marossy]

Well folks,
I did it. I went down into my workshop dungeon DETERMINED to not be daunted by this seemingly easy project. I built the GGG version twice, the tonepad version once, and then I decided to try the runoffgroove version, but at the last second opted for a version from a gentleman on this forum. Paul Marossy to be exact.

Glad I could be of some help to you. I did that PCB layout like 10 years ago now, it's way bigger than it needs to be.