Colorsound- One Knob Fuzz  [schematic]

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

Do you mean how to build a clone of this ?:

Image

Thats very easy, as you can see here:

Image
Image
Image

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Post by borislavgajic »

pictures are nice nice nice!!! thanks..........

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Post by borislavgajic »

this is what I find :D



http://www.musictoyz.com/img200708/color01.jpg


how to make this?

boris

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Post by jrod »

What are the pictures of that AG posted? Colorsound One-Knob Fuzz?

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Post by analogguru »

jrod wrote:What are the pictures of that AG posted? Colorsound One-Knob Fuzz?
The first picture is from a Colorsound (One-Knob) Fuzz Box Reissue from 1996:
Image

The other three pictures are from a clone-pcb of that unit - built by me.

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Post by RnFR »

borislavgajic wrote:this is what I find :D



http://www.musictoyz.com/img200708/color01.jpg


how to make this?

boris

which version is that??
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Post by Fuzzed »

analogguru wrote:Do you mean how to build a clone of this ?:

Image


analogguru

THAT LOOKS ADORABLE! :hug:

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Post by Electric Warrior »

some time ago I made a vero layout based on AG's pics and Stu's schematic. hope it works, haven't tried it yet.
oneknobfuzzvero.png

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Post by patafix »

The versions posted (reissue and clone) look different.

The reissue version has 3 transistors, the clone has two... so what's the 3 transisor for ? Added gain stage? buffer ? Mill Bypass ?
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Post by patafix »

So this circuit has a fuzz face topology... with the gain knob omitted (maxed out all the time) and slightly tweaked values for the components.
Patafix... so sticky

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Post by Electric Warrior »

yes. here's the fuzzcentral schematic: http://fuzzcentral.ssguitar.com/schemat ... obfuzz.gif

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Post by patafix »

But I still don't know why the colorsound reissue has 3 transistors, diodes etc...
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Post by Solidhex »

Yo

The reissue has a clean blend feature with an internal trimpot. That's where the third transistor comes in... http://www.macaris.co.uk/product_full.a ... 27&catID=5

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Post by RnFR »

i was under the impression that this was a vintage release, hence the categorization. is it true that this design was only released within the last decade?
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Post by Electric Warrior »

apparently it's the same circuit that was in the rotosound fuzz: https://stompboxes.co.uk/forum/viewtopic ... 6&start=10

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Post by sonicvi »

Which was also used in the Jennings Growler fuzz/wah.
http://filters.muziq.be/model/jennings/growler

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Post by Bernardduur »

Solidhex wrote:Yo

The reissue has a clean blend feature with an internal trimpot. That's where the third transistor comes in... http://www.macaris.co.uk/product_full.a ... 27&catID=5

--Brad

Is it really a clean blend feature?
'a little preset wheel that allows you to balance the effected sound against your true bypassed sound'

I could also interpret that as a volume control; then maybe the 22k lin pot does something else (like gain or pre-volume or something like that).

Great pedal! I once build one in a Colorsound Fuzz Wah pedal of which the fuzz was removed from.
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Post by analogguru »

Electric Warrior wrote:apparently it's the same circuit that was in the rotosound fuzz: https://stompboxes.co.uk/forum/viewtopic ... 6&start=10
No, it is NOT the same, it is similar....
one big difference is the collector resistor of 4k7 at the second transistor in the Jennings pedal(s) instead of 2k2 in the colorsound pedal.
sonicvi wrote:Which was also used in the Jennings Growler fuzz/wah.
http://filters.muziq.be/model/jennings/growler
The Jennings Fuzz-circuit was also used in the Cyclone.
At least in the cyclone the 220n output cap is loaded with 100k (instead of 470k used in the colorsound pedal).

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Post by Electric Warrior »

analogguru wrote:
Electric Warrior wrote:apparently it's the same circuit that was in the rotosound fuzz: https://stompboxes.co.uk/forum/viewtopic ... 6&start=10
No, it is NOT the same, it is similar....
one big difference is the collector resistor of 4k7 at the second transistor in the Jennings pedal(s) instead of 2k2 in the colorsound pedal.
thanks for clearing that up!

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Post by Mr. G. »

Anybody tried anything like 2N5089/5088 in this pedal?

I ask because I only have some BC108's, and no BC109's at the moment.

Any other transistors that might sound good in this circuit?

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