Ace Tone - FM-3 Fuzz Master

SPeter · Post by **SPeter** » 02 Jun 2009, 18:32

http://filters.muziq.be/model/acetone/fm3

Greg · Post by **Greg** » 03 Jun 2009, 03:45

That's not a gutshot.. this is a gutshot.

Sorry, this is as good I could get without removing wires.. which I've just soldered back so i can play it..

Not much to see.. a bunch of old Greenies... very cramped build.

Whoismarykelly · Post by **Whoismarykelly** » 04 Jun 2009, 01:57

Wow. That is a stuffed PCB.

Greg · Post by **Greg** » 04 Jun 2009, 02:08

Whoismarykelly wrote:Wow. That is a stuffed PCB.

Yes.. the enclosure and board size is the same as the earlier FM-2, which was a simpler circuit.. so I guess they had to cram everything onto this size board or make a new enclosure.

Bernardduur · Post by **Bernardduur** » 05 Jun 2009, 11:47

Speaking of Ace-Tone, I'm just servicing an old Ace-Tone amp......

Sickle · Post by **Sickle** » 06 Jun 2009, 00:02

A *mint* FM-2 arrived this morning before I had to leave for work!!

Greg · Post by **Greg** » 06 Jun 2009, 00:19

Sickle wrote:A *mint* FM-2 arrived this morning before I had to leave for work!!

Very nice..
Maybe you could post some gut shots of that for us ?

sidseizure · Post by **sidseizure** » 17 Jun 2009, 22:32

I thought I'd bump this thread up since I can't possibly be the only one who still wants a look at the schematic on the FM-3.

Or maybe I just need to get a life.

RnFR · Post by **RnFR** » 18 Jun 2009, 00:23

no you most definitely aren't! i too would like to see the little tricks talked about in this box.

Greg · Post by **Greg** » 18 Jun 2009, 01:12

Guys, it's traced and I've built a working copy that sounds like it should.
I just need a clear hour or two to draw up a schematic to post (I'm not too fast on the drawing)... and I haven't had it.
I'll try to get it done over the week-end.

If you take a Triangle Muff, the changes are few..
Less gain on the first stage and a 3300pf cap in parallel with the input resistor.
Lower value on the feedback caps (250pf).
Slighty different values on the tone components, but similar effect.
The volume pot is located before the last stage rather than after.

noelgrassy · Post by **noelgrassy** » 18 Jun 2009, 07:48

^ Right on! Glad to here of your success GregG. A "Triangle Muff" of all things. I look forward to seeing your schemadix.

Bernardduur · Post by **Bernardduur** » 18 Jun 2009, 13:28

Me too!

Bernardduur · Post by **Bernardduur** » 05 Jul 2009, 09:54

No more schematic

Please, post again

Greg · Post by **Greg** » 06 Jul 2009, 00:52

Here ya go:

Dan N · Post by **Dan N** » 06 Jul 2009, 04:39

Thanks for all your efforts!

So, What were the trannies?

Bernardduur · Post by **Bernardduur** » 06 Jul 2009, 06:06

Thank you!

playon · Post by **playon** » 06 Jul 2009, 06:36

soulsonic wrote:Greg, could you post some gutshots of yours? All the previous photo links in these thread seem to be dead and gone.

That's one of my pet peeves about a lot of the DIY pedals forums -- tons of dead links. I go searching for something, find it, and then there is no file anymore. It would be nice to host all that stuff on some private server so it would stay around longer than several months or whatever.

Greg · Post by **Greg** » 06 Jul 2009, 09:23

Dan N wrote:Thanks for all your efforts!

So, What were the trannies?

2SC1000.. all caps are Greenies except the 250 and 3300pf which are ceramic.

tube-exorcist · Post by **tube-exorcist** » 06 Jul 2009, 11:42

Is this a "Y" on the top of the transistors ?

Greg · Post by **Greg** » 06 Jul 2009, 13:51

tube-exorcist wrote:Is this a "Y" on the top of the transistors ?

No, there's no "Y" on them tube exorcist.

Ace Tone - FM-3 Fuzz Master [schematic]