Mesa Boogie - Throttle Box  [schematic]

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Mesa Boogie - Throttle Box  [schematic]

Postby apollomusicservice » 26 Sep 2013, 16:09

Pedal excellent for hi gain but also (with gain lower settings) perfect for rock and blues.
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Re: Mesa Boogie Throttle Box schematics

Postby LaceSensor » 26 Sep 2013, 16:15

Looks to be solidly constructed and interesting it includes and inductor.

thanks!
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Re: Mesa Boogie Throttle Box schematics

Postby osiris » 28 Sep 2013, 21:58

Great work on the schematic, thank you. But I don't see S2, which switches the three gyrator tone shapers in and out in the original design. Is this your modification?
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Re: Mesa Boogie Throttle Box schematics

Postby apollomusicservice » 29 Sep 2013, 07:32

S2 is internal EQ boost/cut switch, on pcb picture placed at bottom left side.
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Re: Mesa Boogie Throttle Box schematics

Postby Dirk_Hendrik » 29 Sep 2013, 09:47

Like the approach with the fixed gyrator EQ!
Sorry. Plain out of planes.

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Re: Mesa Boogie Throttle Box schematics

Postby apollomusicservice » 30 Sep 2013, 12:25

For SMD DIY-ers here is my design of pcb. Resistors and capacitors are 1206
package and C (6mm) for tatntalum capacitors. The pcb is suitable for those who
will not install additional EQ boost/cut components on the bottom side but if you wish to add EQ,
both sides are connected with 4 via holes. Of course tantalum capacitors in the picture are not SMD tantalum,
currently I did not had SMD type.
Pdf file contains top and bottom side of SMD Throttle Box. 8)
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Re: Mesa Boogie Throttle Box schematics

Postby roberttomasz » 03 Oct 2013, 20:32

Question. Look at the picture.

Image

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Re: Mesa Boogie Throttle Box schematics

Postby apollomusicservice » 04 Oct 2013, 08:45

Yes, that is the switch S2, which is located inside the housing. Pedal has enough gain at Lo position so
in my opinion it would be more useful if the switch was mounted out enclosure instead of switches for gain.
On my SMD PCB I predicted one switch in/out EQ mounted on the chassis and perhaps to add one more on/off switch to turn off gyrator for 276Hz.

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Re: Mesa Boogie Throttle Box schematics

Postby roberttomasz » 04 Oct 2013, 15:01

...C19 100nF ,,,???.
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Re: Mesa Boogie Throttle Box schematics

Postby apollomusicservice » 04 Oct 2013, 15:20

roberttomasz wrote:...C19 100nF ,,,???.


Yes and it has function only in bypass mode.
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Re: Mesa Boogie Throttle Box schematics

Postby roberttomasz » 04 Oct 2013, 21:12

B2-B3-C19(100nF)???? ...B2-C1-YES
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Re: Mesa Boogie Throttle Box schematics

Postby gefi » 10 Oct 2013, 17:01

Hello

L1 250 mH or 250uH?
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Re: Mesa Boogie Throttle Box schematics

Postby apollomusicservice » 10 Oct 2013, 17:48

gefi wrote:Hello

L1 250 mH or 250uH?


250 millihenries
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Re: Mesa Boogie Throttle Box schematics

Postby Bill_Mountain » 10 Oct 2013, 17:53

I just sim'd the graphic EQ portion and unless I messed up it didn't equate to much more than a bass boost.

The mid control is nice though!
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Re: Mesa Boogie Throttle Box schematics

Postby roberttomasz » 11 Oct 2013, 13:36

wah-wah ( Dunlop) L1= 500mH
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Re: Mesa Boogie Throttle Box schematics

Postby Mrdorbe » 23 Oct 2013, 10:03

this is amazing, is it posible for you to upload a layout for a board with thru hole parts or a schematic file readable by a program?
i would really like to try building this one.
thanks :)
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Re: Mesa Boogie Throttle Box schematics

Postby apollomusicservice » 27 Oct 2013, 18:44

OK here is pcb done in through-hole technology, like original. There are two pcb's,
first with almost all components and second with jacks, pots and few components.
Pedal has very originally sounds and I change my prejudice about Mesa pedals. 8)
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Re: Mesa Boogie Throttle Box schematics

Postby Mrdorbe » 28 Oct 2013, 09:50

Amazing man!! Thank you so much! I'll try to build it and update.
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Re: Mesa Boogie Throttle Box schematics

Postby Mrdorbe » 28 Oct 2013, 13:49

Except the PDF has only one of the pcbs :cry:
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Re: Mesa Boogie Throttle Box schematics

Postby apollomusicservice » 03 Nov 2013, 15:26

...and second pcb with some minor changes in routing. 8)
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