MODS for the BYOC SHREDDER !!!

ParanoidAndroid · **Posted:** Wed Jun 02, 2010 5:49 pm

*Make sure your pedal works stock before attempting any mods. This can ease troubleshooting.

MORE HIGHS/CLARITY:
This really opens up the tone of the pedal, and adds sparkle to low gain tones. EXCELLENT MOD!

flo wrote:

Refering to BYOC schematics:
http://www.buildyourownclone.com/shredder.html
http://buildyourownclone.com/shredderinstructions.pdf

Strange that both the Treble control and the last opamp section (the buffer after the Contour circuit), filter out the high frequencies of the signal starting at 1kHz. Imo it sounds better to have the last stage as a full-bandwidth buffer and use only the treble control for taming the high frequencies.

The last stage as "stock" Marshall Shredmaster: C15 = 1nF parallel to the 100k negative feedback resistor R15
=> Cutoff frequency = 1.6kHz.
The last stage as full-bandwidth buffer: C15 = 100pF parallel to the 100k negative feedback resistor R15
=> Cutoff frequency = 16kHz.

So if you find the Shredder to be a bit "dull", change C15 to 100pF instead of 1nF (C15 parallel to 100k R15 at the last opamp stage in the schematics of BYOC). It makes the Shredder more "sharp", cutting better through a busy mix.

And as always, of course I'm not the first to notice this:

http://www.diystompboxes.com/smfforum/i ... #msg278733

Read more in this thread: viewtopic.php?f=30&t=12297&st=0&sk=t&sd=a

MORE GAIN !!!

See the PCB picture below? To the left of the IC, there is a 10K Resistor, labeled as "R4"
By lowering the value of this resistor, you will increase the gain. Grab a 10K pot and mount it to your enclosure and you can dial in the gain you want, or simply socket R4 and experiment.

OR…

ManicSubsidal wrote:

You can also add a parallel resistor with a switch. This will ensure that you always can go back to the stock shredder.

If I remember correctly, I used a 1.5K resistor in parallel to the stock resistor. You should be able to go as low as 1K, though.

(If you get a "howl" by lowering the resistor value, try placing a buffered pedal before your shredder)

CLIPPING MOD:

Ikeda wrote:

Hey guys. I just tried a new clipping mod on my shredder and I really like it. It's basically the overdrive mod from beavis audio's Mightier Mouse, except I used the standard 1N914's instead of LED's on the other side of the switch. I think that it sounds really good. It also lets you bypass the clipping diodes and just overdrive the IC.

http://www.beavisaudio.com/Projects/FKR ... rMouse.gif

patrickbrose · **Posted:** Wed Jun 02, 2010 7:08 pm

Well put PA, I have a DPDT switch on C15 to change from "More High" to "Stock". I mounted it in the LED hole and drilled a new hole just above the stomp for the LED. I must say, I never take it out of "More High" mode.
-P

h8mtv · **Joined:** Sun Aug 30, 2009 11:57 am **Posts:** 1481

What value are you using for more?

RMosack · **Joined:** Thu Sep 13, 2007 12:11 pm **Posts:** 360

h8mtv wrote:

What value are you using for more?

More highs or more gain?

For more highs, it's stated above. Use 100pF for C15.

For more gain, it sounds like you simply need a resistor below 10K. If you socket it, you can play around until you find one you like. You could put in a socket, then temporarily attach a 10K pot to find the sweet spot.

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MODS for the BYOC SHREDDER !!!

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