B&M Sola Sound - Fuzz Unit  [schematic]

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

Re: B&M Sola Sound - Fuzz Unit

Postby Electric Warrior » 05 Sep 2010, 01:53

I got an X-Ray of that one lying about :mrgreen:

xray.png


Clarendon Bold should be a pretty good match for the font, btw.. http://new.myfonts.com/fonts/adobe/clarendon/bold/
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Re: B&M Sola Sound - Fuzz Unit

Postby Electric Warrior » 05 Sep 2010, 02:25

and you gotta move the top left capacitor one row to the right. There's a 33k resistor where you put it.
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Re: B&M Sola Sound - Fuzz Unit

Postby Scruffie » 05 Sep 2010, 02:41

While Peps1 is involved in this subject... Check your DIY PMs! (Sorry for the De-Rail too)
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Re: B&M Sola Sound - Fuzz Unit

Postby peps1 » 05 Sep 2010, 03:34

Scruffie wrote:While Peps1 is involved in this subject... Check your DIY PMs! (Sorry for the De-Rail too)

TURNS OUT I DIDNT SWITH ON PM NOTIFICATION :slap:

will PM you tonight/tomorrow and sort them PCBs :wink:
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Re: B&M Sola Sound - Fuzz Unit

Postby peps1 » 05 Sep 2010, 03:43

Electric Warrior wrote:and you gotta move the top left capacitor one row to the right. There's a 33k resistor where you put it.


Cool....done that!

Here is what I got so far!
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Points of query:
1:Used the value 003uf for the ceramic cap as thats what it is on the only Jumbo TB layout.....should be the same, right?
2: ceramic cap code 470 = 470pf?

And its 4Am here....but am I missing a resister here?
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Good Night! :hug:
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Re: B&M Sola Sound - Fuzz Unit

Postby Scruffie » 05 Sep 2010, 03:52

And its 4Am here....but am I missing a resistor here?

Yes you are, but I can't see the value on any of the photos...

TURNS OUT I DIDNT SWITH ON PM NOTIFICATION :slap:

will PM you tonight/tomorrow and sort them PCBs :wink:


Haha, no Worries man, will chat to you in the near future about them.
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Re: B&M Sola Sound - Fuzz Unit

Postby sonicvi » 05 Sep 2010, 08:58

The missing resistor is 100 ohms. Also, you have the transistor pinouts labelled wrong. Should be C-B-E from top to bottom. The original transistors were BC184C.

A word of advice, that 220K resistor in series with the volume pot is completely useless and lowers the output quite a bit. Jumper it and you'll get more volume, otherwise you barely get unity with the volume pot maxed.
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Re: B&M Sola Sound - Fuzz Unit

Postby Electric Warrior » 05 Sep 2010, 11:39

peps1 wrote:
Electric Warrior wrote:and you gotta move the top left capacitor one row to the right. There's a 33k resistor where you put it.


Cool....done that!

Here is what I got so far!
(...)
Points of query:
1:Used the value 003uf for the ceramic cap as thats what it is on the only Jumbo TB layout.....should be the same, right?
2: ceramic cap code 470 = 470pf?


sonicvi wrote:
Electric Warrior wrote:There's two or three different layouts for the jumbo circuit with vertical controls.

some have slightly different resistor values (39k instead of 33k and 10 instead of 8k2) and/or component types (ceramic caps vs. styroflex). What I believe to be the earlier units have tropical fish caps instead of the greenies.
The values of the ceramic/styro caps may vary as well, but it's hard to see in the pictures I found. I've seen styroflex caps with a 500pf color code. Others have the number 220 printed onto them (or is this the voltage rating?). The ceramics in the ebay pics are 470pF. Does anybody have some more data?
And I'm not quite sure about the small cap at lug 1 of the tone pot. is it supposed to be 0.003µF or 0.004µF?


It's usually .0039uF and that's what the original schematic calls for. Sola Sound called the B&M circuit "Fuzz A" and it is identical to the Jumbo with the exception of a 220K resistor at the output. I'm not sure what the purpose of that resistor is as it reduces the volume quite a bit. The pots are usually either all log taper or log for the volume and sustain and linear for the tone. Everything else about this circuit is pretty much evident from the photos and the "Fuzz A/Jumbo Tone Bender" schematic on the web. I think everybody pretty much knows by now the Jumbo is the same circuit as the Big Muff with first pair of clipping diodes and post tone gain stage removed. Doesn't sound like much but they're pretty significant differences soundwise.



;)
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Re: B&M Sola Sound - Fuzz Unit  [schematic]

Postby peps1 » 05 Sep 2010, 15:08

I think its done.....?

But feel free to point out any of my mistakes!

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Re: B&M Sola Sound - Fuzz Unit

Postby Electric Warrior » 05 Sep 2010, 15:42

The Colorsound Supa Wah-Fuzz-Swell used the same circuit board as well :mrgreen:
http://dam.10.forumer.com/viewtopic.php?t=1295
http://www.effectsdatabase.com/model/co ... swell/supa
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Re: B&M Sola Sound - Fuzz Unit

Postby sonicvi » 05 Sep 2010, 17:31

People should be able to work it out from the schematic, but maybe you could label the In, Out, Ground and +9V pads.

From top to bottom they are (using the component side):
Left side:
9V, Ground, Out

Right side:
9V, In, Ground, Out
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Re: B&M Sola Sound - Fuzz Unit

Postby peps1 » 05 Sep 2010, 18:10

Electric Warrior wrote:The Colorsound Supa Wah-Fuzz-Swell used the same circuit board as well :mrgreen:
http://dam.10.forumer.com/viewtopic.php?t=1295
http://www.effectsdatabase.com/model/co ... swell/supa


Any more to add? :lol:

sonicvi wrote:People should be able to work it out from the schematic, but maybe you could label the In, Out, Ground and +9V pads.

From top to bottom they are (using the component side):
Left side:
9V, Ground, Out

Right side:
9V, In, Ground, Out


Thanks sonicvi, have updated the PDF :D

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Re: B&M Sola Sound - Fuzz Unit

Postby peps1 » 07 Sep 2010, 00:07

Image yumyumyum :horsey:
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Re: B&M Sola Sound - Fuzz Unit

Postby Scruffie » 07 Sep 2010, 00:41

Very nice :)

(Did you miss out drilling 2 holes on the bottom board near the M2001 Logo?)
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Re: B&M Sola Sound - Fuzz Unit

Postby peps1 » 07 Sep 2010, 00:49

deliberate mistake :wink:
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Re: B&M Sola Sound - Fuzz Unit

Postby Electric Warrior » 08 Sep 2010, 13:35

peps1 wrote:
Electric Warrior wrote:The Colorsound Supa Wah-Fuzz-Swell used the same circuit board as well :mrgreen:
http://dam.10.forumer.com/viewtopic.php?t=1295
http://www.effectsdatabase.com/model/co ... swell/supa


Any more to add? :lol:


Yes, on different boards, though:
Vox Tone Bender Mark III (some of them) and Eurotec Black Box Fuzz Unit (2 knob) :mrgreen:
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Re: B&M Sola Sound - Fuzz Unit

Postby analogguru » 08 Sep 2010, 14:43

Electric Warrior wrote:
peps1 wrote:
Electric Warrior wrote:The Colorsound Supa Wah-Fuzz-Swell used the same circuit board as well :mrgreen:
http://dam.10.forumer.com/viewtopic.php?t=1295
http://www.effectsdatabase.com/model/co ... swell/supa


Any more to add? :lol:


Yes, on different boards, though:
Vox Tone Bender Mark III (some of them) and Eurotec Black Box Fuzz Unit (2 knob) :mrgreen:

That´s wrong, because the layout is different in the Eurotec Fuzz.

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Re: B&M Sola Sound - Fuzz Unit

Postby Electric Warrior » 08 Sep 2010, 14:49

but the circuit is the same, isn't it?
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Re: B&M Sola Sound - Fuzz Unit

Postby thorpy6 » 08 Oct 2010, 20:34

built one of these (actually two the same) using peps boards for myself,

Here is some pics. Sounds great and well worth the effort. The mojo of the original looking boards just adds to the sound :D :D

Cheers Peps!!

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Re: B&M Sola Sound - Fuzz Unit

Postby peps1 » 09 Oct 2010, 13:44

Really good to see it all put together, very sexy build!!!

Im just waiting for a few of these pots from banzaimusic.com so I can mount pots thought the PCB. :mrgreen:
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