Seamoon (Anderton) Fresh Fuzz gut shots

Discussion regarding early stompbox technology: 1960-1975 Please keep discussion focused and contribute what info you have...
bhill
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Post by bhill »

Another oldie from around 73 or so, the Anderton designed Fresh Fuzz. I find this interesting for a couple of reasons, First it is one of the earlier dirt pedals using the JRC4558, it does not have a clipping section but just overdrives the op-amp, and it has true bypass.

I have seen one on line review of this where the sound is described as "thin", but from my experience it was anything but. I am sure that the way I ran it had nothing to do with that :roll: It fed into a wah (Morley), phasing, flanging, echo into a Marshall full stack (1959 head, 1960 a&b bottoms.) :D Played it that way through most of the 70's.
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bhill
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Post by bhill »

Couple more shots...
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Somewhere around here I have a paper where I traced the circuit, when I find it again I will put it into a bit better shape and upload the schematic.

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Post by bootle »

nice one, thanks! :D

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Post by bootle »

ok, here's what I got,
not sure about some values or whether its right.

I got 560R (green, blue, brown) going from 9v to pin 8
assuming the 2 resistors beside it are 100K (brown, black, yellow)

big ceramics are all 0.05uf
electro 10uf.
that mica looking cap looks like 82pf (50v).

got it on the breadboard now but just getting a clean signal, no fuzzage!
tried 10k and 1M for Bite pot and 100k for Gain.

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Post by Duckman »

Electro C1 have no polarity, right?

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Post by bhill »

Both pots are 50k linear. Yes on the 560R. Small caps are 220pf. Mylar is 82pf Sangamo. I got tied up on some honeydoos today, I will dig out the schematic shortly.

That is a fast layout... :applause:

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Post by bhill »

Electro - goes to the Bite pot lug 3. Standard 12v 10uf polarized.

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Post by bhill »

The - electro going to the Bite pot is part of the ground buss. Found my schemo, I will get it posted tonight.

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Post by Duckman »

Some history :thumbsup

"...Anderton came up with the circuit for Seamoon’s Fresh Fuzz distortion pedal. This circuit was a simple op-amp based device with gain and bite controls. “It was really basic,” says Anderton. “It used regular diodes. If I was to design it today, it would be a lot different.”..."

He talk about "regular diodes" ... what diodes? :scratch:

http://www.adaamps.com/History.htm

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Post by Duckman »

bhill wrote:Electro - goes to the Bite pot lug 3. Standard 12v 10uf polarized.
Sorry, I can't see the negative mark... are you sure?

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Post by bootle »

cheers for the update bhill!

looks to me like the 10uf is in parallel with that 100k beside it (ground to pin 5).
with bite lug 3 going to the 0.05uf ceramic.
I'm still only getting clean signal on the bboard tho, I must have goofed somewhere.

updated vero with new values:

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Post by bhill »

That 100k with the other 100k makes up a standard voltage divider for the second op-amp bias. The electro in parallel with the 100k has the negative side to ground, this electro looks a bit different from normal, the positive side is marked :shock:

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Post by bhill »

Looked at the scheme again, the divider provides bias for both op-amps.

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Post by bootle »

bhill wrote:Looked at the scheme again, the divider provides bias for both op-amps.
ah yes, so pin 3 is connected to pin 5,
thanks man!

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Post by Duckman »

First attemp! Hope it helps
Attachments
fresh fuzz.bmp

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Post by Duckman »

By the way, Discofreq's shows pictures of a 741 version

http://www.effectsdatabase.com/model/seamoon/freshfuzz

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Post by bhill »

Duckman, your scheme matches the hand drawn one I made several months ago, you may have just made me lazy on getting this into Express Schematic. :D I still will just for the practice on the program, but everything matches what I traced. Try breadboarding from this scheme and see how things work.

As to the 741 version, I see a lot lower part count on that one, and the perf board is interesting. That is the one that they called "thin sounding". What puzzles me is that the one I have has quite a lot lower serial number, so you would think that mine is earlier. Just looking at the gut shot, it looks like they just spliced the output onto the first stage of mine. I can see why it might be a bit "thin".

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Post by bootle »

got it working,
I really like it, nice beefy fuzz, not thin sounding at all, lots of output.
the 82pf could be adjusted to taste to tame the top end, I like it as it is (got a 100pf in there).

thanks again for the gutshots bhill.

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Post by bootle »

complete with missing jumper :)
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seamoon fresh fuzz vero3.gif

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Post by bhill »

Duckman wrote:Some history :thumbsup

"...Anderton came up with the circuit for Seamoon’s Fresh Fuzz distortion pedal. This circuit was a simple op-amp based device with gain and bite controls. “It was really basic,” says Anderton. “It used regular diodes. If I was to design it today, it would be a lot different.”..."

He talk about "regular diodes" ... what diodes? :scratch:

http://www.adaamps.com/History.htm
That must have been for an even earlier version, because all of them I've seen have no diodes.

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