Colorsound flanger schem? + Arbiter Booster pics :)

[leonhendrix]

I got a CS flanger but its in a sorry state, I would love to get it running but as they're pretty rare I cant find a schematic could anyone help?

I just got this Arbiter Booster, i had only seen one pic of it before, if there isnt a known schematic lurking around i'll trace it out when I get time 

[Alex C]

Wow, great pictures; thanks!

Is "plus" the volume control?

[Moonface]

Fkin insane, man! I would love too see the schem, when you have finished the tracing... Hope you will be investigating that device soon!!!
Great! 

[jonathan perez]

yes, i too would love to see a layout. 

[Bernardduur]

Wow.....

I didn't even know this pedal

[Moonface]

Wow..... I didn't even know this pedal

Neither did I...

[Dragonfly]

...i used to have one of those !   

AC

[leonhendrix]

Here's the back of the board showing where the componts are placed, im terrible at drawing schematics (always get lost and miss parts out) maybe someone could have a go.



P1/2/3 = Plus
B1/2/3 = Bass
T1/2/3 = Treble

Transistors are BC109c

I forgot the + symbol showing the polarity for the elec caps (2.2 & 20uf), looking at the board the -ve for both caps are at the top.

[formerMember1]

surprised no one asked...

how's it sound!?  Like a Rangemaster or....

cool 

[vortex]

I've checked this thread several times and would love to have more details on how the pedal sounds too! It looks like  an easy build once the schem is sussed.

I guess we need to know the pot values!

Thanks Leon!

[vortex]

Mojo Bump!

[RickL]

It's buildable with the info you've supplied. Any chance you know the value of the pots?

[3/4 North]

I tried a schematic, but I haven't tried a breadboard yet.
If you see any mistakes call them out and I'll fix.

[Moonface]

3/4 North, that's awesome!!!  Now we have another British classic!    I would use 100k lin pots...

[RickL]

I built one last night using the trace photo as a template to construct using the 4ms CBCB method. I used PN2222 transistors and guessed at 100k pots. No joy! I didn't get a peep out of it. I finished too late to do any trouble shooting beyond confirming that all the traces where in fact connected. I'll work on it some more tonight and report if anything changes.

Rick

[Mark Hammer]

Sometimes it's easier to spot wiring and schematic errors when something is shown the way you expect it.  I know it is certainly easier to keep track of transistor pins.

I flipped the schem and labelling around "the right way"  and posted it.

Should that 2.2uf cap after the Plus control really be oriented that way?

[Thomas P.]

Should that 2.2uf cap after the Plus control really be oriented that way?

I'd say yes, since the base of the following transistor would have a higher potential (due to the 4k7 voltage divider) than the wiper of the plus-pot where (at the complete eq) no voltage is applied.
Am I right?

Regards,
tomboy

[3/4 North]

Mark, I wanted to have it read left to right but the pots prevented me.  When it's flipped the 1 lug is where you would expect to find the 3 lug.  But maybe that doesn't matter, I haven't drawn many schems and don't know.

[Mark Hammer]

Mark, I wanted to have it read left to right but the pots prevented me.  When it's flipped the 1 lug is where you would expect to find the 3 lug.  But maybe that doesn't matter, I haven't drawn many schems and don't know.

No, you did a great job, and many thanks for it.  It's my stupid anglo-literate brain that doesn't want to make the directional leap from right to left.  A lot of folks are very accustomed to the EBC pinout and left-to-right schematics, and can imagine a perfboard wiring of transistors using that pinout quite easily when viewing it that way.  Switch to a different pinout like ECB and that facility declines considerably.  Now flip the damn drawing so its "backwards", and we probably couldn't even solder in a resistor properly, let alone a transistor or pot!

[usbdevice]

According to the image it looks like the resistor from Vcc to the base of Q2 should be 47k not 4k7, no?
I'm gonna try and breadboard this tomorrow but I don't have any bc109 on hand, what would be good substitutes?

-Lenny