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Author Topic: OTS Pre Amp Layout  (Read 3687 times)
rsalinger
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« on: March 27, 2010, 11:30:42 AM »

Does anyone have a layout/schematic  for the OD preamp section of the OTS? ...or know where I could get one?

Thanks,
Rob
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Music, like any form of art, is an expression of the inexpressable - Vernon Reid, musician.
mcinku
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« Reply #1 on: March 29, 2010, 02:19:02 AM »

Layout is on Niks site obviously... just take away the power amp part.

Here's preamp schematic of #124... the red values are from OTS S&M.

 Wink


* #124_Overtone.jpg (79.13 KB, 1594x381 - viewed 462 times.)
« Last Edit: March 29, 2010, 02:49:34 AM by mcinku » Logged

erwin_ve
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« Reply #2 on: March 29, 2010, 02:39:22 AM »

Layout is on Niks site obviously... just take away the power amp part.

Here's preamp schematic of #124... the red values are from OTS S&M.

 Wink

Hi Mcinku; that LNFB at v1b. Those resistors are 22M, not 22k!
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mcinku
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« Reply #3 on: March 29, 2010, 02:50:22 AM »

Hi Mcinku; that LNFB at v1b. Those resistors are 22M, not 22k!

Ufff my mistake...

now it's fixed

thanks

 Wink
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rsalinger
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« Reply #4 on: March 29, 2010, 06:10:15 AM »

Thanks for the schematic, mcinku.

Cheers,
Rob
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rsalinger
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« Reply #5 on: March 30, 2010, 07:28:15 AM »

Hi there,
 
Thank you for all the responses and e-mails in regard to the Overdrive Special schematic (especially mcinku and ttt).
 
Recently, I finished my first scratch build (with a lotta help from Pops), a Dr. Z Stangray Clone, which is my Clean "grail tone". The Stangray is more-or-less Vox AC-30 "inspired" amp with a Matchless Cheiftain mid control.

However, what I was hoping to do was add the Overdrive Special OD circuit with a relay to function as a 'lead channel'. Is this feasable?
 
If so, what parts of the schematic should I ignore?
 
Thanks, respectfully,
 
Rob Salinger



* StangrayLayout1_1.jpg (134.3 KB, 1024x724 - viewed 389 times.)
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hywelg
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« Reply #6 on: March 30, 2010, 11:22:23 AM »

I'm no electronics wiz but first off you're going to need another valve in there, and I don't think I've ever seen a circuit where an EF86 feeds another gain stage.
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rsalinger
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« Reply #7 on: March 31, 2010, 10:51:05 AM »

Thanks hywelg,

That's exactly what I thought.

The whole reason that I thought of this set up is because of Brad Paisley (whose tone I adore). He plays a Dr. Z Stangray Amp with a Zen Drive Pedal. The Zen Drive is a Dumble-type pedal...

So, I figures I'd try to put "A" and "B" together. You know 1 and 1 is 2.

I'm gonna look into this further, then.

Thanks,

Rob
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