Biyang Tonefancier Blue BL-8  [schematic]

All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.
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blue4me
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Post by blue4me »

I really like this pedal. I’ll work on a schematic in a bit but here’s pics for now. I’m wondering what it’s derived from.

It’s very warm (no treble), has loose bottom, very smooth, a ton of output. Only thing I could see wrong with it was some nuts were loose.

Image

Image

Image

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Renegadrian
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Post by Renegadrian »

Did you manage to work the schem out!? it seems a little but funny circuit...curious to read it!

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EddieTavares
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Post by EddieTavares »

It looks like a proco rat without the output buffer and leds instead a diodes, it's easy to implement a tone control.

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CheapPedalCollector
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Post by CheapPedalCollector »

I was about to say yeah, it looks like a RAT.

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Manfred
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Post by Manfred »

I made this PCB clone for tracing, can you please put the component values in the picture with the components.
Biyang Tonefancier Blue BL-8 Layout.JPG
Biyang Tonefancier Blue BL-8 Component Side.jpg

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Renegadrian
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Post by Renegadrian »

Right! Just got one today for cheap, man let me say it's one of the worst pedal I've ever played! it can get some use with just a zic of gain, turn it up and you get lifeless mud sound...
Last edited by Renegadrian on 30 Dec 2020, 21:21, edited 1 time in total.

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Renegadrian
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Post by Renegadrian »

UPDATED!
Biyang Tonefancier Blue BL-8 Layout comp.jpeg
Last edited by Renegadrian on 31 Dec 2020, 15:10, edited 6 times in total.

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Manfred
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Post by Manfred »

This pedal is similar to the FAME Slasher DS-10, so I just had to edit its schematic.
viewtopic.php?f=1&t=30326&p=278466&hili ... er#p278466
Can you please measure the values of the potentiometers and the resistors?
BiyangTonefancierBlueBL-8Layout_2.JPG
Biyang Tonefancier Blue BL-8 Schematic.JPG

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Renegadrian
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Post by Renegadrian »

gain is b100k and volume is b10k

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Post by Manfred »

Renegadrian wrote: 30 Dec 2020, 23:52 gain is b100k and volume is b10k
Thanks, are the resistance values correct, have you already checked them?

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Renegadrian
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Post by Renegadrian »

Did you read my previous post!?

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Manfred
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Post by Manfred »

Renegadrian wrote: 31 Dec 2020, 07:57 Did you read my previous post!?
Yes I did, you wrote in the previous post:
Got a problem with 1/8 metal resistors, quite difficult to read for me, guess it will be easy for others to complete the schem.
Therefore I wrote:
Can you please measure the values of the potentiometers and the resistors?
I think we are talking at cross purposes, did you measure values of resistors to confirm them?

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Renegadrian
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Post by Renegadrian »

Right, I wouldn't read those damn resistors, I just measured with MM.
The previous image I uploaded has been updated.

Guess I'll transform it into a grey dod 250, it should be quite easy.

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Post by Manfred »

Renegadrian wrote: 31 Dec 2020, 14:53 Right, I wouldn't read those damn resistors, I just measured with MM.
The previous image I uploaded has been updated.

Guess I'll transform it into a grey dod 250, it should be quite easy.
Thanks a lot!

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Post by Manfred »

Here the verified layout and the verified circuit diagram.
Biyang ToneFancier Blue BL-8 Layout.JPG
Biyang Tonefancier Blue BL-8 Schematic.JPG
Last edited by Manfred on 01 Jan 2021, 17:22, edited 1 time in total.

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Post by CheapPedalCollector »

Super easy to add a tone control to that and make it into an overdrive with a couple 100k pots.

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Renegadrian
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Post by Renegadrian »

small correction on the schem, gain is 100k linear not log. please change accordingly.

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Post by Manfred »

Renegadrian wrote: 01 Jan 2021, 01:26 small correction on the schem, gain is 100k linear not log. please change accordingly.
The potentiometer type I have changed circuit diagram above.

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xfree
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Post by xfree »

I want to mod this with a tone knob, i find it too wooly at times on high gain....but perfect tone on the low gain
Pedal peddler

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wildschwein
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Post by wildschwein »

Love this pedal -- huge thick tone with good sustain. Great with single coils.

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