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Mountainking Electronics - Megalith

Posted: 28 Mar 2013, 08:04
by Eyeofowl
I have been a long time lurker here and wanted to contribute. This is the first pedal I have traced and drawn a schematic for. It would be nice to get a second set of eyes, but I only have a crappy phone camera. I can post my perf trace if need be.

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Re: Mountainking Electronics - Megalith

Posted: 28 Mar 2013, 13:26
by Bernardduur
Looks like something is burned........

Re: Mountainking Electronics - Megalith

Posted: 28 Mar 2013, 15:10
by ringworm
I had been wondering about this pedal. Some guts have turned up online. Is your copy a clone or re-housed pedal?
Some random images,... none of which are mine...

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There's a trim pot on the board of that last one. It's for active pick-ups, not sure where it goes.

Re: Mountainking Electronics - Megalith

Posted: 29 Mar 2013, 01:53
by Eyeofowl
My buddy got this pedal from Wino(Saint Vitus, Shrinebuilder, etc.). The bottom plate is numbered 1 and the signature matches the one in your pic. It may have gone through some revisions by now...

Re: Mountainking Electronics - Megalith

Posted: 29 Mar 2013, 10:14
by ringworm
Wow! That's some Pedigree!
The layout still looks the same but i couldn't say if values have changed from the pics.

Re: Mountainking Electronics - Megalith  [traced]

Posted: 31 Mar 2013, 04:16
by Eyeofowl
After trying to put this together on vero, I realized there were multiple resistor errors and a wrong cap. At least I learned something... Always double check component values and use a multimeter if in doubt. I haven't done a comparison with the original, but everything is working and it sounds good. Here is the updated Schematic:

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Re: Mountainking Electronics - Megalith

Posted: 31 Mar 2013, 18:52
by onebuzz
I was puzzled why mine did not work. I'm a touch colorblind so those metal film resistors are a bugger to read. Thanks for the revised schematic.

Re: Mountainking Electronics - Megalith

Posted: 11 Apr 2013, 20:53
by destro
100ka on the output, I am assuming?

Re: Mountainking Electronics - Megalith

Posted: 11 Apr 2013, 22:45
by Ice-9
Your polarity protection diode is burned out, replace it and check for shorts.

Re: Mountainking Electronics - Megalith

Posted: 12 Apr 2013, 10:09
by ringworm
destro wrote:100ka on the output, I am assuming?
The schematic in the original post had the output pot listed as 100kB.

Re: Mountainking Electronics - Megalith

Posted: 12 Apr 2013, 14:40
by atreidesheir

Re: Mountainking Electronics - Megalith

Posted: 14 Apr 2013, 01:22
by onebuzz
Just posting a circuit shot of my workalike device. Turned out pretty good.

Re: Mountainking Electronics - Megalith

Posted: 14 Apr 2013, 02:45
by Eyeofowl
Ice-9 wrote:Your polarity protection diode is burned out, replace it and check for shorts.
It's in parallel. I am under the assumption that it is kind of useless to replace? I guess I could put one in series for my buddy, but I am kind of lazy.
onebuzz wrote:Just posting a circuit shot of my workalike device. Turned out pretty good.
Awesome! did you add the notch shift rotary? I was going to just wire up a Dpdt(on-off-on) with 10n, 10n, and 22n to get 10n, 20n, and 32n. Close enough I think.

Re: Mountainking Electronics - Megalith

Posted: 14 Apr 2013, 12:10
by onebuzz
Just added a single pole on-on switch with .01uf and .033uf.

Re: Mountainking Electronics - Megalith

Posted: 01 Jun 2013, 18:40
by agoldoor
How can no one have posted a layout for this yet, or confirmed the schem yet? =)

Re: Mountainking Electronics - Megalith

Posted: 05 Jun 2013, 20:56
by agoldoor
Bump for a vero? =)

Re: Mountainking Electronics - Megalith

Posted: 06 Jun 2013, 01:22
by IvIark
There you go

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Re: Mountainking Electronics - Megalith

Posted: 06 Jun 2013, 02:39
by agoldoor
G'damn you rule IV!

Re: Mountainking Electronics - Megalith

Posted: 06 Jun 2013, 18:18
by agoldoor
Wow, and already verified by onthetundra! Everyone here works quickly! =)

Re: Mountainking Electronics - Megalith

Posted: 09 Jun 2013, 22:21
by agoldoor
Alright, I finally completed my build of this one... and I have to say, HOLY GOD!

This is EASILY the loudest pedal I've ever built or played. A lot of other pedals I've built or played that border on that edge of being the "MOST" of something end up also being on the verge of farting out, or completely falling apart (transistors completely gating with certain knob settings, high volume breaking out into squealing/oscillation, etc.)... but this certainly doesn't do that. I was unable to play around with this guy on anything more than 1.5 on my amp's volume knob. It's THAT GOD DAMNED LOUD.

Glad this one's been traced though finally, bravo to all involved.
:applause: :applause: :applause: