Catalinbread - Formula No. 5  [traced]

General documentation, gut shot, schematic links, ongoing circuit tracing, deep thoughts ... all about boutique stompboxes.
Gary_W
Posts: 11
Joined: 13 Aug 2010, 01:21

Post by Gary_W »

Seiche wrote: I know what you mean, sometimes it is, sometimes it's not. The BS170P that the original SHO uses as a 180° pinout from the common BS170 many D.I.Y.ers substitute, for example. So same part number, different manufacturer can still have different pinouts, is what I meant.

More often than not the person doing the layout uses the pinout of the substitutes they have at hand, yet still lists the original part.
Thanks Seiche - I appreciate you taking the time to reply and I'll be especially careful of that in future :)

H.A.
Posts: 1
Joined: 19 Apr 2012, 08:11
Been thanked: 2 times

Post by H.A. »

Hello people.

This is my first post in this great forum, which I always read.

I just wanted to upload a PCB I made for Formula 5.
BOM, PCB and Layour on *.rar file.

PCB is verified, put it together with a COT50 from La Revolution Deux.

Pics:
Half-way through the wiring!
Image

Etching
Image

Layout preview of the PCB:
Image
Attachments
Formula 5.rar
BOM, PCB and Layout.
(68.9 KiB) Downloaded 148 times

mganzer
Breadboard Brother
Posts: 51
Joined: 15 Jul 2011, 13:31
Has thanked: 29 times
Been thanked: 21 times

Post by mganzer »

Hi Guys; Anyone put the hands in one of that? someone knows what changes from formula n5?(aside from the obvious tone stack changes)?


Cheers
MG

throni3fsb
Posts: 2
Joined: 28 Mar 2013, 19:00
Has thanked: 2 times

Post by throni3fsb »

mutetourettes wrote:...

If anything, fed with humbuckers this pedal has too much gain. Any suggestions for reducing the gain?
Hello, schematic painters and signal tracers,

first, i wanna thank you for your good work. I built the Formula five last night and it worked immediatly. However, i wondered, why it clips a little bit hard with gain all down, when played hard. Especially with humbuckers, as you may have expierienced. With LTspice, i simulated it and changed the 62k input resistor to higher values, and changed it on my Formula 5 to 1000k. I've seen on the pictures on the first page of this thread, that it should be 620k instead of 62k, because the rings are blue red orange instead of blue red red. Could someone please verify this??

These days i will try to match the transistors. For that purpose, are there some recommended values, or is it ok as long as the transistors are in a similar region??

Greetings
Thomas

roseblood11
Tube Twister
Posts: 1862
Joined: 23 Aug 2008, 15:21
Has thanked: 344 times
Been thanked: 298 times

Post by roseblood11 »

It's pretty obvious that it`s blue-red-orange, but that means "62k". 620k would be blue-red-yellow...
Does it sound better/closer to the original pedal with the 620k?

In another version of my vero layout I noted "C1 is 470pF, not 47pF" - but I don't remember, where that came from. Was it mentioned in the thread before?

induction
Resistor Ronker
Posts: 276
Joined: 07 Feb 2012, 21:47
Has thanked: 62 times
Been thanked: 111 times

Post by induction »

roseblood11 wrote:In another version of my vero layout I noted "C1 is 470pF, not 47pF" - but I don't remember, where that came from. Was it mentioned in the thread before?
Final answer is here with discussion throughout that page.

throni3fsb
Posts: 2
Joined: 28 Mar 2013, 19:00
Has thanked: 2 times

Post by throni3fsb »

roseblood11 wrote:It's pretty obvious that it`s blue-red-orange, but that means "62k". 620k would be blue-red-yellow...
Does it sound better/closer to the original pedal with the 620k?
You are right. It is orange, but for some reason i had another factor in mind. so it is 62k.

I can't say that it is closer to the original. But for me, it works better because now i control the clipping only with the gain knob, not with my guitar volume knob anymore. I simply didn't like it, when the first clipping stage came to clip. Of course, the overall gain is lower with this modification. I don't know whether i will keep the mod or not, i will test it for a while.

Greetings
Thomas

mutetourettes
Posts: 13
Joined: 23 Dec 2010, 00:15
Has thanked: 1 time
Been thanked: 5 times

Post by mutetourettes »

So it seems there was a Mark II catalinbread formula no5 with (reportedly) some differences in circuit/components (and then a Mark iii, which was just a paint job supposedly) - does anyone have any idea about the differences?
(I'm not talking about the newer 5f6 by the way)

Mark

Ice-9
Transistor Tuner
Posts: 1088
Joined: 31 Mar 2009, 16:29
my favorite amplifier: Marshall
Completed builds

Far to many to afford the enclosures for them all. :)

Has thanked: 131 times
Been thanked: 350 times
Contact:

Post by Ice-9 »

roseblood11 wrote:
In another version of my vero layout I noted "C1 is 470pF, not 47pF" - but I don't remember, where that came from. Was it mentioned in the thread before?
Yeah roseblood the correct value is 470p It was my pedal originally and I made the mistake labelling it 47p, but that error was cleared up and the correct value was definitely 470p
It's fairly straight forward, if you want to start it , press start. You can work out the rest of the controls for yourself !

No silicon heaven ? preposterous ! Where would all the calculators go ?

IvIark
Tube Twister
Posts: 2297
Joined: 02 Jan 2008, 00:59
Location: Manchester UK
Has thanked: 599 times
Been thanked: 608 times
Contact:

Post by IvIark »

Thought I already posted this but must have missed it

Image
"If anyone is a 'genius' for putting jacks in such a pedal in the only spot where they could physically fit, then I assume I too am a genius for correctly inserting my legs into my pants this morning." - candletears7 - TGP

matt239
Solder Soldier
Posts: 226
Joined: 11 Sep 2010, 19:54
Has thanked: 61 times
Been thanked: 5 times

Post by matt239 »

+1
I have an original Formula 5, I'm curious what's different here. - Is it just the tone stack?
- Sounds nice.

Motter
Solder Soldier
Posts: 157
Joined: 24 Aug 2012, 19:02
Location: New Orleans
Has thanked: 26 times
Been thanked: 108 times

Post by Motter »

I built this pedal with an extra footswitch for the 2M resistor (thanks IVIark!), but the box I have is drilled for four pots instead of three so I'm wondering what I can put in that fourth spot.

So far I'm thinking a voltage starve or a bass cut. What do you guys think would be more useful? Alternatively I could make that last pot into a boost pedal (sho or rangemaster), but I really like the built in boost effect of switching out the 2M.

User avatar
Nocentelli
Tube Twister
Posts: 2156
Joined: 09 Apr 2009, 08:06
Location: Leeds, UK
Has thanked: 844 times
Been thanked: 786 times

Post by Nocentelli »

Anybody seen gutshots or (shock horror) own one? I'm tempted to buy one with a view to tracing and I'm interested in finding out if they are SMD
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?

roseblood11
Tube Twister
Posts: 1862
Joined: 23 Aug 2008, 15:21
Has thanked: 344 times
Been thanked: 298 times

Post by roseblood11 »

BUMP

Would really like to see the Formula 55 traced...

roseblood11
Tube Twister
Posts: 1862
Joined: 23 Aug 2008, 15:21
Has thanked: 344 times
Been thanked: 298 times

Post by roseblood11 »

This pedal is incredible, I'd really like to see it traced!
https://www.youtube.com/watch?v=29NHfe8KQ3Q

POTL
Resistor Ronker
Posts: 308
Joined: 26 Sep 2016, 04:11
Has thanked: 61 times
Been thanked: 61 times

Post by POTL »

There is Formula №5
Formula No 5 Fixed.png
Presence control will look something like this
Although in an ideal it would be to see the scheme
https://s26.postimg.org/nd6u7z4ll/SC_1.png

roseblood11
Tube Twister
Posts: 1862
Joined: 23 Aug 2008, 15:21
Has thanked: 344 times
Been thanked: 298 times

Post by roseblood11 »

I built that years ago...
The Formula No.55 is a completely different circuit

nicothyrael
Posts: 1
Joined: 09 Jun 2017, 21:33

Post by nicothyrael »

I'm making a Dirty little secret to practice until someone publish the schematic of this one.
I hope it will be soon, as I don't have one I can't help too much.

roseblood11
Tube Twister
Posts: 1862
Joined: 23 Aug 2008, 15:21
Has thanked: 344 times
Been thanked: 298 times

Post by roseblood11 »

In most european countries it's possible to buy a pedal online and then to send it back without any cost. Off course, that's not a nice way...

mr coffee
Posts: 25
Joined: 10 Jul 2009, 04:54
Has thanked: 50 times
Been thanked: 10 times

Post by mr coffee »

Has anybody seen the insides ? The demo sounds pretty good.
mr coffee

Post Reply