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Re: Colorsound - Power Boost / Overdriver

PostPosted: 10 Aug 2009, 15:16
by Electric Warrior
pf_fan wrote:
Electric Warrior wrote:I just fought myself through dozens of Power Boost and Overdriver gut shots. Here's some variations of the circuit:

I hope you'll find those pics useful as well :)
http://www.megaupload.com/?d=S3OUCL39


sorry, nothing new that I can make out.

Maybe I should have mentioned in the shematic that the later Overdrivers have a 10µF cap at Q1's emitter..

Re: Colorsound - Power Boost / Overdriver

PostPosted: 10 Aug 2009, 16:28
by Rocket Roll
I wonder - could anybody provide the original 18V Overdriver schematics and/or layout, so that we could use a 17V charge-pump (http://www.generalguitargadgets.com/ind ... &Itemid=26) to make a clone of it?

Re: Colorsound - Power Boost / Overdriver

PostPosted: 16 Aug 2009, 20:07
by Electric Warrior
guess what I did on page 4? :)

here's my layouts, I hope I didn't mess up too bad..

Re: Colorsound - Power Boost / Overdriver

PostPosted: 17 Aug 2009, 04:25
by blueduck577
i just built one of these off of the hand drawn overdriver schematic dated 6-14-71... and it doesn't sound like an overdrive to me at all. it does the clean boost but when it distorts it sounds more like a fuzz face to me. like others said it's sounds sort of splatty and misbiased. is this what it's supposed to sound like? i used 2N5088s for the transistors... I have some BC108s and some 2N2222s on hand also, though others have said the transistors don't make much of a difference.

it's late, so I haven't had the chance to crank the amp.

Re: Colorsound - Power Boost / Overdriver

PostPosted: 17 Aug 2009, 10:35
by Rocket Roll
Electric Warrior wrote:guess what I did on page 4? :)


Great, thanks a million! Could you maybe make a PCB layout, if that's not too much to ask?

Re: Colorsound - Power Boost / Overdriver

PostPosted: 17 Aug 2009, 10:52
by Electric Warrior
blueduck577 wrote:i just built one of these off of the hand drawn overdriver schematic dated 6-14-71... and it doesn't sound like an overdrive to me at all. it does the clean boost but when it distorts it sounds more like a fuzz face to me. like others said it's sounds sort of splatty and misbiased. is this what it's supposed to sound like? i used 2N5088s for the transistors... I have some BC108s and some 2N2222s on hand also, though others have said the transistors don't make much of a difference.

it's late, so I haven't had the chance to crank the amp.


right, it's a boost. does yours sound anything like this? http://www.youtube.com/watch?v=69UZiByEGkQ

Great, thanks a million! Could you maybe make a PCB layout, if that's not too much to ask?


no, why don't you make one yourself?

Re: Colorsound - Power Boost / Overdriver

PostPosted: 17 Aug 2009, 15:43
by Brink
Rocket Roll wrote:Great, thanks a million! Could you maybe make a PCB layout, if that's not too much to ask?

One already exists: http://www.aronnelson.com/gallery/main. ... alNumber=3

Re: Colorsound - Power Boost / Overdriver

PostPosted: 17 Aug 2009, 16:19
by jrod

Re: Colorsound - Power Boost / Overdriver

PostPosted: 17 Aug 2009, 16:53
by Electric Warrior
these are all for the Overdriver. Rocket Roll was looking for Power Boost layout, which is not 100% compatible with the Overdriver PCB layouts posted. The 12k resistor at Q1's emitter connects with Q2's collector in the power boost.
For some reason the .1µF capacitor across the bass pot is missing in those layouts.. :hmmm:

Re: Colorsound - Power Boost / Overdriver

PostPosted: 17 Aug 2009, 19:49
by blueduck577
this thing doesn't like buffers. running direct guitar -> overdriver -> amp sounds fantastic. but when I inserted it in my signal chain after a boss SD-1, it became splatty and had treble emphasis. maybe thats why I felt it sounded misbiased earlier.

oh well, looks like it's going to replace the SD-1 anyway, and all of my other pedals are true bypass. maybe I'll just put it first in the chain. either way this thing sounds great with the amp going full tilt.

Re: Colorsound - Power Boost / Overdriver

PostPosted: 30 Sep 2009, 04:40
by .Mike
Hey guys,

I put together an original layout for this using the "Overdriver" schematic, and thought I would share. It's kind of niche layout, so it won't be suitable for everyone. This is the second layout I have ever done.

This is for a long-term multi-effects unit I'm building for myself. I will do at least 10 different original layouts when all is said and done. I'll be posting the project files for each as I compete them. All of my layouts will have: Board-mounted pots (meant to mount vertically); Volume pot on top; 4" x ~2" max dimensions; and Molex jacks for in/out/power/ground connections. I've already released my PIC tremolo, but it disappeared a while back and I haven't had a chance to repost it yet.

Anyway, here are all the files for anyone who is interested:
CSOD.zip

I've included: ExpressPCB files (.pcb, .sch); PDFs of the PCB, SCH, toner transfer, layout, and pseudo-silkscreen; images of etched board; images of completed build.

For the pseudo-silkscreen (fakescreen?), I toner transfer it onto the component side using photo paper, soak, and rub off all the paper except a thin layer to make it legible on the component side. If you do this, make sure you flip the image to reverse it.

Finally, here are some photos in case you just want to look: link.

Enjoy! :)

Mike

Re: Colorsound - Power Boost / Overdriver

PostPosted: 17 Nov 2009, 21:18
by yeeshkul
Guys is there any chance to find out whether Gilmour's Power Boost (1972 - 1977) was 9V or 18V version?

Re: Colorsound - Power Boost / Overdriver

PostPosted: 30 Dec 2009, 06:35
by TheLemon
yeeshkul wrote:Guys is there any chance to find out whether Gilmour's Power Boost (1972 - 1977) was 9V or 18V version?


It was probably 18v, the version i cloned mine after

Re: Colorsound - Power Boost / Overdriver

PostPosted: 30 Dec 2009, 07:46
by jzilla
Dr Tony Balls wrote:yup!, used this vero layout, which checked out against the original schematic that you posted.

http://aronnelson.com/gallery/main.php/ ... d.jpg.html


i'm thinking of trying this for my first stripboard build. can someone tell me what the red squares on the stripboard represent? eg one is above the left transitor. another to the right of R3.

many thanks!
-j

Re: Colorsound - Power Boost / Overdriver

PostPosted: 30 Dec 2009, 09:08
by SPeter
jzilla wrote:
Dr Tony Balls wrote:yup!, used this vero layout, which checked out against the original schematic that you posted.

http://aronnelson.com/gallery/main.php/ ... d.jpg.html


i'm thinking of trying this for my first stripboard build. can someone tell me what the red squares on the stripboard represent? eg one is above the left transitor. another to the right of R3.

many thanks!
-j


The red squares show where to cut the strips!
:D

Re: Colorsound - Power Boost / Overdriver

PostPosted: 30 Dec 2009, 10:11
by jzilla
SPeter wrote:
jzilla wrote:
Dr Tony Balls wrote:yup!, used this vero layout, which checked out against the original schematic that you posted.

http://aronnelson.com/gallery/main.php/ ... d.jpg.html


i'm thinking of trying this for my first stripboard build. can someone tell me what the red squares on the stripboard represent? eg one is above the left transitor. another to the right of R3.

many thanks!
-j


The red squares show where to cut the strips!
:D


thanks!

Re: Colorsound - Power Boost / Overdriver

PostPosted: 30 Dec 2009, 12:30
by GeekMacDaddy
The layout calls for a 200pf cap. I replace that with (or you could put on a switch) a 470pf, and it gives the pedal it's missing bottom. :D

Re: Colorsound - Power Boost / Overdriver

PostPosted: 30 Dec 2009, 18:40
by jzilla
GeekMacDaddy wrote:The layout calls for a 200pf cap. I replace that with (or you could put on a switch) a 470pf, and it gives the pedal it's missing bottom. :D


thanks for the tip! what size enclosure would you recommend using btw?

Re: Colorsound - Power Boost / Overdriver

PostPosted: 30 Dec 2009, 18:46
by GeekMacDaddy
Should fit into anything.

Re: Colorsound - Power Boost / Overdriver

PostPosted: 30 Dec 2009, 19:03
by jzilla
GeekMacDaddy wrote:Should fit into anything.


oh yeah? even a 125B? for some reason i was under the impression it needed a bigger enclosure...