Prescription Electronics - COB ( Clean Octave Blend )  [traced]

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Prescription Electronics - COB ( Clean Octave Blend )

Postby analogguru » 17 Jul 2007, 21:00

There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
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Re: Prescription Electronics - COB (Clean Octave Blend)

Postby puppiesonacid » 10 Apr 2008, 03:27

you think maybe this is a green ringer with volume and clean blend functions added? hmmm...
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Re: Prescription Electronics - COB (Clean Octave Blend)

Postby analogguru » 10 Apr 2008, 08:08

It´s more a mix of a Fender blender input stage (similar can be found in the foxx Tone-Machine and Univox Uni-Fuzz) followed by a foxx Tone-Machine Octave/Distortion-engine. Have a look at these schematics.

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Re: Prescription Electronics - COB (Clean Octave Blend)

Postby puppiesonacid » 10 Apr 2008, 12:11

where are the schematics? I've been digging around for them for a while and can't find them anywhere...
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Re: Prescription Electronics - COB (Clean Octave Blend)

Postby analogguru » 10 Apr 2008, 12:44

puppiesonacid wrote:where are the schematics? I've been digging around for them for a while and can't find them anywhere...

Learn how to use the search function - if you type in "Fender" and "Blender" you will get this:
viewtopic.php?f=19&t=141&p=768&hilit=fender+blender#p768

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Re: Prescription Electronics - COB (Clean Octave Blend)

Postby puppiesonacid » 10 Apr 2008, 15:09

analoguru you have a PM, also if anyone knows where I can find an prescription electroincs schematic for the COB let me know. I'd like to compare them with the blender.


Thanks.
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Re: Prescription Electronics - COB (Clean Octave Blend)

Postby noelgrassy » 18 Apr 2008, 23:51

I'd like to add pictures of mine. It's an earlier version but appears identical to the model submitted by AG.

Image

Those of you with an art program capable of creating "layer" images of varying opacity should be able to convert these two into a
usable schematic diagram.

Image

I drew up a schematic years ago that I'll submit for reference to parts values at best.
The picture host has lopped off the right hand side of these pics. At least on these included pics. Bummer. Here's the links to the
picture files. I hope it helps.

http://i145.photobucket.com/albums/r222/noelgrassy/Free%20Stomp%20Boxes%20Archives/PEI_C-O-B_02-12-952.jpg

http://i145.photobucket.com/albums/r222/noelgrassy/Free%20Stomp%20Boxes%20Archives/PEI_C-O-B_02-12-951.jpg
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Re: Prescription Electronics - COB (Clean Octave Blend)

Postby puppiesonacid » 19 Apr 2008, 02:20

awesome! thanks, but the pic of the tracks is still lopped off. can you take another and post?


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Re: Prescription Electronics - COB (Clean Octave Blend)

Postby MoreCowbell » 19 Apr 2008, 03:15

puppiesonacid wrote:awesome! thanks, but the pic of the tracks is still lopped off. can you take another and post?


puppiesonacid



Just "right click" on your mouse and select "view image"...you'll see the tracks.
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Re: Prescription Electronics - COB (Clean Octave Blend)

Postby puppiesonacid » 19 Apr 2008, 03:24

no, the bottom left corner of the pcb tracks is cut off in the picture.
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Re: Prescription Electronics - COB (Clean Octave Blend)

Postby MoreCowbell » 19 Apr 2008, 04:22

puppiesonacid wrote:no, the bottom left corner of the pcb tracks is cut off in the picture.


using this pic the AG linked you should be able to figure it out.
http://www.digimart.net/images/64/DS00252872_3.jpg

it "looks" at a glance like the traces end there, so whats off the pic are just offboard connections...but i didnt look closely or analyze it.
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Re: Prescription Electronics - COB (Clean Octave Blend)

Postby noelgrassy » 19 Apr 2008, 04:25

That is where the board endeth. There's nothing on the other side of those 2 solder pads.
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Re: Prescription Electronics - COB (Clean Octave Blend)

Postby noelgrassy » 19 Apr 2008, 04:39

All xistors are 2N3904, all diodes are 1N4001, all the 'lytics are 10uf @ 16VDC, except the one located bottom/right
side of board.
That little fella's a 1uf @ 50VDC.
Blue Mylar caps are 100n.
Polyprop cap sez 1000 pf.

Pots are:

Blend=250k Log or "B" type
Octave= 1M Log
Volume= 100k Log
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Re: Prescription Electronics - COB ( Clean Octave Blend )

Postby analogguru » 19 Apr 2008, 11:56

And here comes the
Prescription Electronics - Clean Octave Blend schematic

enjoy and compare,
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Re: Prescription Electronics - COB ( Clean Octave Blend )

Postby puppiesonacid » 19 Apr 2008, 12:49

Thank you AG! : :D
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Re: Prescription Electronics - COB ( Clean Octave Blend )

Postby sergedeep » 19 Apr 2008, 20:48

does it sound good?
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Re: Prescription Electronics - COB ( Clean Octave Blend )

Postby puppiesonacid » 24 Apr 2008, 23:35

idk, but I want to find out
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Re: Prescription Electronics - COB ( Clean Octave Blend )

Postby Torchy » 25 Apr 2008, 00:08

Not yet verified - any errors lemme know ...

Image
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Re: Prescription Electronics - COB ( Clean Octave Blend )

Postby puppiesonacid » 25 Apr 2008, 02:47

torch, you rock. thanks man
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Re: Prescription Electronics - COB ( Clean Octave Blend )

Postby rousejeremy » 10 Jun 2009, 18:40

I built this using what I assume is Torchys vero and can't get it to work. There is a direct guitar signal without power, but when power is hooked up, just noise.

Has anyone else built it?
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