IN PROGRESS FUZZTONE (opamp fuzz) from 1977 by Everyday Electronics & added pages for the '67 Fuzz Box

[Fuzzonaut]

This one is lifted from the D.A.M. site, "Sounds pretty rad on bass!", says the Captain, which is good enough for me - and hopefully you too?

It's from July 1977 and uses 2 opamps, one of them to do the fuzzy thing with GE diodes and the other for a cut/boost bass and treble tone control.
Also pointed out: "it uses two batteries and has a dual-rail power supply."

Could be tried on vero, but I'm lazy and don't like vero too much ... so I'd prefer a PCB, pretty please?




This one from 1967 is quite interesting too, especially when adding an LFO for "rhythmic fuzz".

 

[Fuzzonaut]

Oh wow, already tagged in progress!
Thanks @Robert !

 

[KR Sound]

Very cool!

 

[Feral Feline]

... "Sounds pretty rad on bass!"...

I had to upvote it, even though it's already tagged...

Many thanks for posting E. Lyndsell's article, and the '67 link (I'll have to sign up!), too!

 

[Fuzzonaut]

I had to upvote it, even though it's already tagged...

Many thanks for posting E. Lyndsell's article, and the '67 link (I'll have to sign up!), too!

I didn't realize that you can't see that as a guest, sorry. So here are the pages for the '67 fuzz box with extras, they list:
Distortion, boost, frequency division, intermodulation, tremolo.




Another one, @Robert ?

 

[Elijah-Baley]

The FuzzTone has a LM748 IC, I think it is really hard to find. That op-amp seems to be an LM741, but "faster and quieter". Not idea how we can replace it.
I'm just curious about it.

 

[ThePanda]

These are really cool.

 

[Coda]

I had to upvote it, even though it's already tagged...

Many thanks for posting E. Lyndsell's article, and the '67 link (I'll have to sign up!), too!

I upvoted too…because I always take @Feral Feline advice…just don’t go with him when he rolls up in a Yellow Submarine…

 

[Coda]

I love that they call it the “Fuzz Module”…

 

[Feral Feline]

The FuzzTone has a LM748 IC, I think it is really hard to find. That op-amp seems to be an LM741, but "faster and quieter". Not idea how we can replace it.
I'm just curious about it.

I didn't think they were hard to find — mind, I got a couple so long ago I don't remember where they came from.

Try UA748, that's the Fairchild equivalent, IIRC, and you may have better luck sourcing that one (I haven't tried searching for it yet).

UA748 ALSO from ST, here's a link to the datasheet on Digikey.

 

[Robert]

That op-amp seems to be an LM741, but "faster and quieter". Not idea how we can replace it.
I'm just curious about it.

Well I know what I'm going to replace it with...

Something "slower and noisier"...

 

[ThePanda]

I didn't think they were hard to find — mind, I got a couple so long ago I don't remember where they came from.

Try UA748, that's the Fairchild equivalent, IIRC, and you may have better luck sourcing that one (I haven't tried searching for it yet).

UA748 ALSO from ST, here's a link to the datasheet on Digikey.

Lemme try eBay!!!!