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Lil Modified OD issue

Moderators: geekmacdaddy, sjaustin, dcountry13, Non-Reverse, duhvoodooman, Stephen, Morgan, baj2k, Matt

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joew

Post subject: Lil Modified OD issue

Posted: Wed Jun 13, 2018 12:45 pm

Joined: Fri Mar 13, 2015 2:53 pm
Posts: 102

The pedal works, but not how I have come to expect BYOC pedals (I’ve built several).
The LED is very dim when on.
The tone control has very little effect and is on the bassier side.
The volume is at parity almost at full on.
The Drive works and sounds nice.

I’ve attached photos for another set of eyes. (These resisters are hard to read with my tired old eyes)

Thanks…..Joe

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IMG_2427.JPG [ 949.69 KiB | Viewed 2562 times ]

IMG_2429 copy.jpg [ 954.77 KiB | Viewed 2562 times ]

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Nwkenning

Post subject: Re: Lil Modified OD issue

Posted: Wed Jun 13, 2018 12:54 pm

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Joined: Mon Feb 04, 2013 8:28 pm
Posts: 1352
Location: Richland, WA.

You swapped the 4k7 and 470k resistors. Fix that and see how it is.

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The tone is in my hands?!
Email: nick@buildyourownclone.com

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duhvoodooman

Post subject: Re: Lil Modified OD issue

Posted: Wed Jun 13, 2018 12:55 pm

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Joined: Tue Jan 02, 2007 1:24 pm
Posts: 16217
Location: Albany, NY

Looks like you've swapped the 4.7K and 470K resistors at R1 and R19. See labeled PCB diagram below. Fix those and see if things are working normally.

EDIT: Looks like Nick & I agree! :mrgreen:

P.S. Outstanding photos for troubleshooting the problem! Wish everyone posted pics of this quality!

_________________
“My favorite programming language is SOLDER” - Bob Pease (RIP)

My Website * My Musical Gear * My DIY Pedals: Pg.1 - Pg.2

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joew

Post subject: Re: Lil Modified OD issue

Posted: Wed Jun 13, 2018 1:54 pm

Joined: Fri Mar 13, 2015 2:53 pm
Posts: 102

You guys are the greatest!!!
Swapped the two resistors and presto......works great, sounds great.

I think next time, I will take photos of the resistors and sort them by the blow ups.

Thanks bunches...........

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sjaustin

Post subject: Re: Lil Modified OD issue

Posted: Wed Jun 13, 2018 1:57 pm

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Joined: Tue Feb 09, 2010 4:45 pm
Posts: 4691
Location: Rochester, NY

joew wrote:

I think next time, I will take photos of the resistors and sort them by the blow ups.

This is an ingenious idea! (Of course you will eventually want a multimeter and can then measure them to be certain, but in the meantime…)

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Scott

My band, Austin Hollow

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Board index » Build Your Own Clone » Effects Pedal Technical Support » Op amp based Distortions, fuzzes and overdrives

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