DOD - FX20B Stereo Phaser  [schematic]

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Gino
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Post by Gino »

Hey, first post here. I'm a member at BYOC and DIYstompboxes. Alright, I'll get right to it... Anyone know where I can find the schematic for the DOD FX20B Stereo Phaser? I found the schematic for the FX20C but I don't know if it's the same as the FX20B. Does anyone have any insight? Thanks in advance! :)

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culturejam
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Post by culturejam »

I asked Digitech for the schematic of the DOD FX-20 (4-stage OTA, mono), but they didn't have the document. But they did send me the schematic, layout, and trace images for the DOD-FX20B, which is a 6-stage OTA stereo phaser.

And they responded in just 13 hours! :applause:

Document attached. It's factory document, but there are no copyright notices and they didn't mention not sharing..... :mrgreen:

FX20B.pdf
(137.17 KiB) Downloaded 754 times

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bhill
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Post by bhill »

That one looks like it's gonna be a fun PNP transfer. :shock:

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robrhy
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Post by robrhy »

Attachments
DOD - FX20-B Stereo Phaser schematic
DOD - FX20-B Stereo Phaser schematic
The Blues Is Just a Bald Man With a Comb

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tube-exorcist
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Post by tube-exorcist »

robrhy wrote:Any one know if this pedal is true bypass.(DOD STEREO PHASER FX20-B)
yes: no
"I've noticed there's an inverse relationship between cost of gear and talent. If you need the most expensive gear to get decent tones, then you suck as a player."

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Post by robrhy »

tube-exorcist wrote:
robrhy wrote:Any one know if this pedal is true bypass.(DOD STEREO PHASER FX20-B)
yes: no
yes: no ? :?
The Blues Is Just a Bald Man With a Comb

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tube-exorcist
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Post by tube-exorcist »

robrhy wrote:
tube-exorcist wrote:
robrhy wrote:Any one know if this pedal is true bypass.(DOD STEREO PHASER FX20-B)
yes: no
yes: no ? :?
(it is not true bypass)
"I've noticed there's an inverse relationship between cost of gear and talent. If you need the most expensive gear to get decent tones, then you suck as a player."

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robrhy
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Post by robrhy »

tube-exorcist wrote:
robrhy wrote:
tube-exorcist wrote:
robrhy wrote:Any one know if this pedal is true bypass.(DOD STEREO PHASER FX20-B)
yes: no
yes: no ? :?
(it is not true bypass)
Ah now i see :D said the blind man.
The Blues Is Just a Bald Man With a Comb

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Dreverb
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Post by Dreverb »

Hello, any idea about how to mod this pedal to sound more univibe??
Thanks anyway

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Post by solewheelin »

robrhy wrote: 28 Nov 2013, 22:37 http://www.americaspedal.net/fx20b/
*attachment of schematic
I need a quick fix.
Can someone with an FX20-B please tell me where the wire from that 5th main solder point (3rd if looking at solder side)
on the bottom of the PCB goes? Should be a green wire.
It says "main out" in the attachment posted by robrhy.
Thanks for any help

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