Friedman BE-OD Pedal  [traced]

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Re: Friedman BE-OD Pedal

Postby ballfire » 11 Nov 2017, 02:31

good day..and more power to those people here..


hey bugg thank you for the schematic..

Is this the schematic that sound like the 80s metal thing setting of friedman clone..??? i saw a youtube demo of friedman clone that sound like fuzz pedal and i dont like it.. other sound like really good like metal tone.. i like the metal tone sinister sound..its impressive..



thanks again i really appreciate it.. :D
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Re: Friedman BE-OD Pedal

Postby bugg » 11 Nov 2017, 03:58

brddx1 wrote:Hey Bugg, may I ask what difference is between the 2 pcb versions? I just purchaced v1 with 1/8W resistors.


The new version uses 1/4W resistors because a few people had trouble sourcing 1/8W resistors (I get mine from Tayda), also the component placement was made a bit more symmetrical to satisfy my obsessive tendencies.

Aside from that, there is no difference... The tone, circuit, wiring, and control layout is exactly the same.

Image

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Re: Friedman BE-OD Pedal

Postby ragtime8922 » 12 Nov 2017, 05:20

I used the first bugg board and it was tight with 1/4 resistors but worked fine. Which cap is causing the oscilation? I may switch in the new cap because there is a killer George Lynch tone to be dialed in with the oscilation but I don't want it all the time. I love this circuit.
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Re: Friedman BE-OD Pedal

Postby Branimir » 12 Nov 2017, 10:11

I used 470pF instead of 120pF, no oscillation whatsoever.
If you scoop, it sounds like poop!
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Re: Friedman BE-OD Pedal

Postby jalmonsalmon » 12 Nov 2017, 18:02

Branimir wrote:I used 470pF instead of 120pF, no oscillation whatsoever.

I would socket that space and try different cap values
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Re: Friedman BE-OD Pedal

Postby alexradium » 14 Nov 2017, 13:46

johnk wrote:i just finished one and it sounds great.
which layout was used for this?
nice one,thanks
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Re: Friedman BE-OD Pedal

Postby johnk » 14 Nov 2017, 17:45


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Re: Friedman BE-OD Pedal

Postby johnk » 16 Nov 2017, 11:39

alexradium wrote:its funny!
this layout is also different from your finished pedal!
i will check it out,thank you!


you're right! here's the one that i used for the pedal:

01- BDO PCB 125B .jpg
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Re: Friedman BE-OD Pedal

Postby modman » 16 Nov 2017, 11:56

Summarized the thread in the first post: viewtopic.php?f=7&t=27775&p=259677#p259677
"The whole point of diy is diy. It's not dsoiyathodtr - do some of it yourself and then have others do the rest" (paulc)

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Re: Friedman BE-OD Pedal

Postby roseblood11 » 18 Nov 2017, 23:31

Under "definite schematics" you link to the thermionic build doc, which shows silicon clipping diodes. And to a post by bajaman, where he states that only those zetex transistors can sound right, but it's schottkys in the attached schematics.
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Re: Friedman BE-OD Pedal

Postby ballfire » 20 Nov 2017, 02:53

good day ..

i think the 120pf is not actually 120pf because by looking on the actual pictures on pcb board, the yellow capacitor seems look bigger..may be they tamper the label on it just to confused who may want to trace the actual pedal.. :hmmm:
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Re: Friedman BE-OD Pedal

Postby modman » 20 Nov 2017, 11:41

roseblood11 wrote:Under "definite schematics" you link to the thermionic build doc, which shows silicon clipping diodes. And to a post by bajaman, where he states that only those zetex transistors can sound right, but it's schottkys in the attached schematics.

Yes, it's a mess... is there a more definite schematic available?
ballfire wrote:good day ..
i think the 120pf is not actually 120pf because by looking on the actual pictures on pcb board, the yellow capacitor seems look bigger..may be they tamper the label on it just to confused who may want to trace the actual pedal.. :hmmm:

it's voltage rating that determines the size of a capacitor...
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Re: Friedman BE-OD Pedal

Postby Frabbio » 20 Nov 2017, 14:53

download/file.php?id=30088&mode=view
I built it using this schematic and i got no problem with oscillation with the 120pF cap, the pedal sounds really close to the demos using 2 x BAV99.
From what i gathered this schematic should be correct, the only missing components are 2x100nf capacitor used as decoupling cap for the opamps, but it works flawlessly even without them.

If someone else has built this version, please chime in and share your experience!
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Re: Friedman BE-OD Pedal

Postby Frabbio » 20 Nov 2017, 17:07

Single sided layout for Dirty Shirley+Friedman BeOd in a box, this layout has the best of both worlds, there are 7 pcb mounted pots so you can build a BeOD with a mid control, or a DS with a tight knob, as said before the only notable difference is R16 in my schematic (10k for BEOD, 27k for DS).

I used through hole ICs this time, but i kept the smd diodes (BAV99). If somebody is interested i can post the same layout with normal diodes.
Board dimensions are 115x40mm, it should fit in a hammond bb enclosure.
Layout still unverified but it should work.

If you build it please report if everything is working as intended.

Good DIY!
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Re: Friedman BE-OD Pedal

Postby bugg » 20 Nov 2017, 20:23

Very nice, I have a similar board on order. Can't see any reason it wouldn't work.

I'm really not a fan of the toggle switch sticking out the side of the original DS.
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Re: Friedman BE-OD Pedal

Postby mnemonic » 02 Dec 2017, 22:53

I got Bugg's PCB the other day, real quality board. I like how symmetrical the layout is. I both love and hate how compact it is... It looks great and I'm glad it fits so well into a 125b, but that compactness does make it a bit harder to work on. No big deal for experienced people but I can still count on two hands how many pedals I've built. I'll get there, I hope.

Worked perfect on the second try (I somehow managed to flip the reverse polarity protection diode). Really great sounding pedal!

(Please ignore the giant red 10n caps, didn't realise the ones I had were too big until I was already half way done, and I'm too impatient to wait for replacements)
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