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Schaller - Fuzz  [schematic]

PostPosted: 09 Jan 2008, 22:23
by Bernardduur
Also in a package; a non working Schaller fuzz

Image

Image

Schaller fuzz schematic from Analogguru's site; this version differs though:

- No C3
- C5 = 10 uF

Unit works now; sound sucks though :) Transistors are BC (no further marks).

PostPosted: 10 Jan 2008, 02:43
by seniorLoco
:shock: Is that 4pdt switch ??!

PostPosted: 10 Jan 2008, 07:35
by Bernardduur
seniorLoco wrote::shock: Is that 4pdt switch ??!


No a 4PST switch

PostPosted: 10 Jan 2008, 08:34
by seniorLoco
ahh yup ... looks cool tho :lol:

PostPosted: 10 Jan 2008, 10:30
by modman
Great pics BD!

I have a similar patient here Schaller too, didn't have the chance to post.
There a good chance that replacing the polarized electrolytes top and bottom by new ones will make a considerable difference, but check the voltages to we know what going on in the gain stages.

Case plastic too?

PostPosted: 10 Jan 2008, 20:50
by Bernardduur
I think so too yes.... but the owner won't let me! He likes the sound, dunno why :)

Voltages:
V+ = 9.03V

Q1:
C = 2.05
B = 0.63
E = 0

Q2:
C = 4.75
B = 1.69
E = 1.05

And yes, plastic case, metal underplate

PostPosted: 15 Jan 2008, 10:14
by analogguru
- No C3


possible, but C3 always was mounted on the solder side on all units I have seen.

analogguru

PostPosted: 15 Jan 2008, 11:57
by NickS
Welcome back, AG! Hope all is OK (see "AG content" thread in Members).
Good grief, that Schaller fuzz uses components I still have in my box. Those electrolytics....

PostPosted: 15 Jan 2008, 20:28
by Bernardduur
analogguru wrote:
- No C3


possible, but C3 always was mounted on the solder side on all units I have seen.

analogguru


I checked when I got the unit if the C3 wasn't on the other side. It's not there :). Sounds pretty nice on high volume btw!

Re: Schaller - Fuzz

PostPosted: 10 Mar 2008, 02:04
by MoreCowbell
Pics of a different unit....

Image

Image

Re: Schaller - Fuzz

PostPosted: 10 Mar 2008, 02:22
by analogguru
That´s the older ge-transistor version probably with 2 x AC 192.

analogguru

Re: Schaller - Fuzz

PostPosted: 10 Mar 2008, 02:38
by MoreCowbell
analogguru wrote:That´s the older ge-transistor version probably with 2 x AC 192.

analogguru



I'm trying to buy it from the owner (bypassing the auction). Its a non working unit...I'm sure its just a fuzz face variation, but I'd still like to own it.

Re: Schaller - Fuzz

PostPosted: 24 Sep 2008, 23:06
by modman
Here are some pics of the older Ge unit, which might have gone under the name 'Fuzz Booster'? At least that's how this unit was listed on Ebay.

Re: Schaller - Fuzz

PostPosted: 02 Oct 2008, 19:42
by fosnal1950
It's one of the worst sounding fuzzes I know by modern standards - I used to play one back then !!

Alf

Re: Schaller - Fuzz

PostPosted: 03 Oct 2008, 14:03
by Alex Frias
fosnal1950 wrote:It's one of the worst sounding fuzzes I know by modern standards - I used to play one back then !!

Alf


Hummmm... I think now I'm into it!!!

Re: Schaller - Fuzz

PostPosted: 15 Nov 2008, 17:11
by plexilover
Are the guts this one of the running version?
A friend of mine has got one, not working, wired it the same way, components ok, no sound just humming...

Re: Schaller - Fuzz

PostPosted: 08 Jul 2010, 21:48
by lolbou
Some more guts showing different PCB placing and missing/removed part. These two units are currently for sale on a french ad site, both for around 150/200€, both claiming to be stock (which looks like a lie)... The enclosure style is different too.