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 thorpy6 » 09 Oct 2010, 14:49

I had the right pots (Citec, look like the originals) but the thread on the pot wasn't long enough to go through the pcb, enclosure and not short on the inside of the case. Shame but it woeks nicely and looks ok inside so i'm not too fussed.
Owner and chief Solder wielder at ThorpyFx
thorpy6
 
Posts: 38
Joined: 15 Dec 2008, 13:56
Has thanked: 0 time
Have thanks: 5 times

Re: B&M Sola Sound - Fuzz Unit

Postby peps1 » 09 Oct 2010, 15:18

thorpy6 wrote:I had the right pots (Citec, look like the originals) but the thread on the pot wasn't long enough to go through the pcb, enclosure and not short on the inside of the case. Shame but it woeks nicely and looks ok inside so i'm not too fussed.


is that a cock up my end, using 2mm board, or a enclosure thickness issue? :?
Image
User avatar
peps1
Solder Soldier
 
Posts: 247
Joined: 12 Oct 2009, 20:37
Has thanked: 2 times
Have thanks: 56 times

Re: B&M Sola Sound - Fuzz Unit

Postby Electric Warrior » 09 Oct 2010, 20:55

or maybe a wrong bush type issue?
User avatar
Electric Warrior
Diode Debunker
 
Posts: 729
Joined: 23 Feb 2009, 04:37
Has thanked: 21 times
Have thanks: 89 times

Re: B&M Sola Sound - Fuzz Unit

Postby thorpy6 » 10 Oct 2010, 00:39

enclosure and bushing on pots,the enclosures really thick. the board was as expected. robust and old school.
Owner and chief Solder wielder at ThorpyFx
thorpy6
 
Posts: 38
Joined: 15 Dec 2008, 13:56
Has thanked: 0 time
Have thanks: 5 times

Re: B&M Sola Sound - Fuzz Unit

Postby beenabadbunny » 14 Mar 2011, 14:26

I've got one of these:

140320112366.jpg

140320112363.jpg

140320112362.jpg

140320112361.jpg


I love the sound but the low output means I can't play it live. Don't want to mod my original one so I have ordered one of peps1's PCBs. I'll leave out the 220K output resistor when I build it. :)
You do not have the required permissions to view the files attached to this post.

For this message the author beenabadbunny has received thanks:
Desdog (18 Mar 2015, 19:45)
beenabadbunny
 
Posts: 4
Joined: 11 Mar 2011, 16:57
Has thanked: 0 time
Have thanks: 2 times

Re: B&M Sola Sound - Fuzz Unit

Postby beenabadbunny » 14 Mar 2011, 14:31

sonicvi wrote:The pots are usually either all log taper or log for the volume and sustain and linear for the tone.


It might not be too easy to see in my pics above, but mine has a linear pot for volume and log pots for sustain and tone.
beenabadbunny
 
Posts: 4
Joined: 11 Mar 2011, 16:57
Has thanked: 0 time
Have thanks: 2 times

Re: B&M Sola Sound - Fuzz Unit

Postby sonicvi » 15 Mar 2011, 02:55

I said "usually" :) I've seen different combos. All linear taper would be fine either way.
sonicvi
Solder Soldier
 
Posts: 160
Joined: 30 Dec 2007, 08:17
Has thanked: 0 time
Have thanks: 12 times

Re: B&M Sola Sound - Fuzz Unit

Postby beenabadbunny » 15 Mar 2011, 09:12

Did they just use whatever came to hand? I suppose ultimately a 100K pot is a 100K pot.
beenabadbunny
 
Posts: 4
Joined: 11 Mar 2011, 16:57
Has thanked: 0 time
Have thanks: 2 times

Re: B&M Sola Sound - Fuzz Unit

Postby ringworm » 18 Jul 2012, 14:18

I've knocked up a version of the B&M after peps1's layout and have a question:
Does the tone pot work in reverse?
I get all my high end through with the tone knob maxed counter clockwise, if I max it clockwise it gets very wooly and there appears to be a bit of volume drop. Sustain and volume work as expected.
I made up a modified version of the original layout to fit in a 120x95 enclosure and followed the trace that peps1 had made of the unit.
Here's my project file:
jumbo3.pdf
You do not have the required permissions to view the files attached to this post.

For this message the author ringworm has received thanks:
dv8r601 (03 Apr 2018, 00:19)
ringworm
Breadboard Brother
 
Posts: 121
Joined: 19 Apr 2009, 17:36
Has thanked: 26 times
Have thanks: 78 times

Re: B&M Sola Sound - Fuzz Unit

Postby John Lyons » 18 Jul 2012, 17:06

The original did this as well I believe. (which is the same Peps layout)
The schematic you linked is set up with the treble on the right though.
User avatar
John Lyons
Solder Soldier
 
Posts: 188
Joined: 18 Aug 2007, 04:09
Location: West Virginia
Has thanked: 5 times
Have thanks: 26 times

Re: B&M Sola Sound - Fuzz Unit

Postby ringworm » 19 Jul 2012, 09:00

Ok, thanks. I made the schematic and layout in Eagle CAD and they are consistent on the error check. Lug 3 goes to the 3n9 and lug 1 goes to the 10nF as per the original tracer layout, and my posted schematic.
ringworm
Breadboard Brother
 
Posts: 121
Joined: 19 Apr 2009, 17:36
Has thanked: 26 times
Have thanks: 78 times

Re: B&M Sola Sound - Fuzz Unit

Postby ringworm » 26 Jul 2012, 11:02

Went de-bugging and found my 3n9 capacitor was dead. swapped it for a 4n3. Unusual as I'd measured it just before I put it in.
Tone control behaves normally now, low to the left and bright to the right.
You do not have the required permissions to view the files attached to this post.
ringworm
Breadboard Brother
 
Posts: 121
Joined: 19 Apr 2009, 17:36
Has thanked: 26 times
Have thanks: 78 times

Re: B&M Sola Sound - Fuzz Unit

Postby Nocentelli » 26 Jul 2012, 12:54

What a great looking build!
brownwhopping wrote:How can I learn by reading threads an making circuits, when some day I can see a lawsuit or somebody beat me in the face for that?
User avatar
Nocentelli
Tube Twister
 
Posts: 2119
Joined: 09 Apr 2009, 08:06
Location: Leeds, UK
Has thanked: 902 times
Have thanks: 857 times

Re: B&M Sola Sound - Fuzz Unit

Postby ringworm » 27 Jul 2012, 08:15

Cheers! :thumbsup
My second go at using toner transfer onto the enclosure. Couple of bits didn't transfer and then the clearcoat made my sharpie fill-ins run. I probably should've left the "fuzz unit" text off too but I'm pleased with it. (especially now it's working properly!)
ringworm
Breadboard Brother
 
Posts: 121
Joined: 19 Apr 2009, 17:36
Has thanked: 26 times
Have thanks: 78 times

PLZ HELP - B&M Champion Fuzz Unit

Postby szetszho » 13 Feb 2015, 10:28

i am building the fuzz unit base on the layout from one of the member here
Jumbo copy.pdf


Image
Image
Image

buti cant get any sound out of this
i have try BC184 and BC549

but when i use my finger touch the red circle area
there are sound with volume and tone knob working but not the gain
Image
what happen?
You do not have the required permissions to view the files attached to this post.
szetszho
 
Posts: 4
Joined: 10 Feb 2015, 18:10
Has thanked: 0 time
Have thanks: 0 time

Re: PLZ HELP - B&M Champion Fuzz Unit

Postby modman » 13 Feb 2015, 17:45

szetszho wrote:[ Image ]
what happen?

you forgot to clean off toner after etching?
why are the groundplanes on the pots still black and that piece top right corner?

two questions:
where's the schematic?
did you really go to a thread download this layout and started a new thread and uploaded same layout to new thread?
User avatar
modman
a d m i n
 
Posts: 4347
Joined: 19 Jun 2007, 17:57
Has thanked: 3293 times
Have thanks: 611 times

Re: B&M Sola Sound - Fuzz Unit

Postby armdnrdy1 » 13 Feb 2015, 18:12

armdnrdy1
Breadboard Brother
 
Posts: 104
Joined: 07 Oct 2012, 01:11
Has thanked: 14 times
Have thanks: 68 times

Re: PLZ HELP - B&M Champion Fuzz Unit

Postby szetszho » 14 Feb 2015, 05:31

modman wrote:
szetszho wrote:[ Image ]
what happen?

you forgot to clean off toner after etching?
why are the groundplanes on the pots still black and that piece top right corner?

two questions:
where's the schematic?
did you really go to a thread download this layout and started a new thread and uploaded same layout to new thread?

sorry about having a new thread cause i saw the last reply is in 2012 so i am just start a new one

and i am using the pre-sensitized PCB and what it said i can just leave the green layer there so as to protect the copper
szetszho
 
Posts: 4
Joined: 10 Feb 2015, 18:10
Has thanked: 0 time
Have thanks: 0 time

Re: PLZ HELP - B&M Champion Fuzz Unit

Postby peps1 » 14 Feb 2015, 07:31

szetszho wrote:and i am using the pre-sensitized PCB and what it said i can just leave the green layer there so as to protect the copper


You can leave the green masking on to protect the copper from oxidising until you are ready to solder components, at which point it needs to be removed, and the board soldered, or tinned.
Image
User avatar
peps1
Solder Soldier
 
Posts: 247
Joined: 12 Oct 2009, 20:37
Has thanked: 2 times
Have thanks: 56 times

Re: PLZ HELP - B&M Champion Fuzz Unit

Postby szetszho » 14 Feb 2015, 17:09

peps1 wrote:
szetszho wrote:and i am using the pre-sensitized PCB and what it said i can just leave the green layer there so as to protect the copper


You can leave the green masking on to protect the copper from oxidising until you are ready to solder components, at which point it needs to be removed, and the board soldered, or tinned.

ok i see. thanks mate. i will remove it next time .but i have soldered all the copper layer so it should be working..am i right?
i got sound when i touch the red area it seems there is problem out there
szetszho
 
Posts: 4
Joined: 10 Feb 2015, 18:10
Has thanked: 0 time
Have thanks: 0 time

PreviousNext

Return to Vintage Stompbox Corner ( ... - 1975)

Who is online

Users browsing this forum: MSN [Bot] and 4 guests