Colorsound - Tremolo
- MoreCowbell
- Transistor Tuner
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- soulsonic
- Old Solderhand
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So, Q4 acts as a switch and shunts the signal to ground, and how much gets divided to ground is determined by the setting of the Depth pot? Clever. I wonder how it sounds compared to the LDR type. I expect it wouldn't have the same hysteresis effect that an LDR has because the on/off time constants would be faster. I wonder how it would sound if you used a FET for Q4?
"Analog electronics in music is dead. Analog effects pedal design is a dead art." - Fran
Q4 is actually used in the variable collector-resistance region of it's characteristic. And inverted. Using transistors inverted (i.e. swapping collector for emitter) often produces better switch and variable resistance results in bipolars; an old trick from back when the only devices available for variable R and switching were bipolars.
- dai h.
- Solder Soldier
that was one of the better (sounding) DIY'ed pedals I made from the mag(where the schematic is from). I tried to figure out how to get it to go faster but only had limited success (due to my own lack of technical understanding). Oh yeah, trying an R and C in series with the battery helped to make it sound a bit more "dimensional".
- Stephengiles
- Breadboard Brother
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- Joined: 04 Nov 2007, 13:02
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http://www.4shared.com/dir/5287188/698a ... sound.html
This is the circuit and parts placement on the Colorsound Tremolo I had - and sold for £100!
This is the circuit and parts placement on the Colorsound Tremolo I had - and sold for £100!
- Stephengiles
- Breadboard Brother
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- Joined: 04 Nov 2007, 13:02
- Location: Selsdon, England
- analogguru
- Old Solderhand
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Pictures linked by more cowbell are not "vintage". They are from a 90´s reissue, which - like in many cases of colorsound "90´s-reissues" - hadn´t anything in common with the original boxes except the case... an example is the colorsound tonebender Reissue - a shame for the name Tonebender:
http://analogguru.an.ohost.de/001/schem ... der_RI.gif
THe graphics shown by stephen Giles represent a "pre-75" unit. The 77 -units had 4 transistors.
analogguru
http://analogguru.an.ohost.de/001/schem ... der_RI.gif
THe graphics shown by stephen Giles represent a "pre-75" unit. The 77 -units had 4 transistors.
analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
- MoreCowbell
- Transistor Tuner
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Here you go AG...
- analogguru
- Old Solderhand
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That´s the 77 version ... to be exactly the pcb shown was produced on 10/12/77
analogguru
analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
- MoreCowbell
- Transistor Tuner
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I should go through my gut shots gallery and see what ones might be useful....
- analogguru
- Old Solderhand
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After retracing i have to say the schematic from stephen contains mistakes:
C and E of the "attenuation transistor" are reversed (as typically for this era). and the series resistor is 1k and not 4k7 - if it is correct in the tracing.
analogguru
C and E of the "attenuation transistor" are reversed (as typically for this era). and the series resistor is 1k and not 4k7 - if it is correct in the tracing.
analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
- Stephengiles
- Breadboard Brother
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- Posts: 106
- Joined: 04 Nov 2007, 13:02
- Location: Selsdon, England
Possibly, but it's exactly as in the unit I had which worked
- analogguru
- Old Solderhand
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The part placement drawing or the schematic ?Stephengiles wrote:Possibly, but it's exactly as in the unit I had which worked
They differ from each other.
analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
- Stephengiles
- Breadboard Brother
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- Posts: 106
- Joined: 04 Nov 2007, 13:02
- Location: Selsdon, England
Part placement - mmmmmmmm thanks for noticing that!analogguru wrote:The part placement drawing or the schematic ?Stephengiles wrote:Possibly, but it's exactly as in the unit I had which worked
They differ from each other.
analogguru
- bootle
- Breadboard Brother
so just to clarify, the vintage pre-'75 unit had 3 trannies and the post '77 had 4?THe graphics shown by stephen Giles represent a "pre-75" unit. The 77 -units had 4 transistors.
is this the post '77 one?:
how many were in the 90s re-issue and how did it compare to the earlier versions?
I read there was more of a volume drop on the 90s ones.
I just built a 3 tranny version from a dragonfly vero with a MPSA13 and two 2N5089s and it's sounds pretty good.
Hellobootle wrote:so just to clarify, the vintage pre-'75 unit had 3 trannies and the post '77 had 4?THe graphics shown by stephen Giles represent a "pre-75" unit. The 77 -units had 4 transistors.
is this the post '77 one?:
how many were in the 90s re-issue and how did it compare to the earlier versions?
I read there was more of a volume drop on the 90s ones.
I just built a 3 tranny version from a dragonfly vero with a MPSA13 and two 2N5089s and it's sounds pretty good.
I build simpler version this tremolo, but I'm not satisfied of his sound. Do You have printable PCB for "your" version?
I have few projects using KiCad. I will send on request
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Hi,
here are my version that i build. (3 trannys)
regards Uwe
here are my version that i build. (3 trannys)
regards Uwe
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- Colorsound Tremolo bottom.pdf
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- Colorsound Tremolo Top.pdf
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- ansil
- Cap Cooler
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have you seen the fulltone mods done on this pedal. i had mine traced out cause there was no way i was going to go crazy with this thing.
man way to many jumpers he had an unused board in this thing hadn't been populated. and built it i will have to show you the pics soon as my room mate gets up we can take some on his high res camera.
not a lot of mods on it did sub out a fet though instead one of the transistors
man way to many jumpers he had an unused board in this thing hadn't been populated. and built it i will have to show you the pics soon as my room mate gets up we can take some on his high res camera.
not a lot of mods on it did sub out a fet though instead one of the transistors
- uncleboko
- Cap Cooler
What exactly are you saying about jumpers?ansil wrote:have you seen the fulltone mods done on this pedal. i had mine traced out cause there was no way i was going to go crazy with this thing.
man way to many jumpers he had an unused board in this thing hadn't been populated. and built it i will have to show you the pics soon as my room mate gets up we can take some on his high res camera.
not a lot of mods on it did sub out a fet though instead one of the transistors