Traynor Monoblock II preamp pedal

Stompboxes circuits published in magazines, books or on DIY electronics websites.

Traynor Monoblock II preamp pedal

Postby johnk » 28 Jul 2016, 20:31

I just finished building a pedal version of the Traynor Monoblock II preamp. I used the factory schematic and followed it exactly for this build. the original preamp runs on a bipolar 15 volt supply so I added a bipolar charge pump to enable the pedal to run off a standard 9 volt power supply capable of at least 60ma.

here's a pic of the completed pedal in an etched 1590BB with all top jacks and a relayed true bypass:

Image

gut shot:

Image

and here's a soundclip of it with a P bass thru my 215 cab:

https://soundcloud.com/johnk_10/monoblockii

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287m (28 Jul 2016, 20:44), Intripped (28 Jul 2016, 20:48), J-fish (02 Jan 2017, 11:56), karul (21 Aug 2016, 17:51), rcustoms (29 Jul 2016, 12:30), V1nce69 (28 Jul 2016, 20:57), Zokk (28 Jul 2016, 22:03)
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Re: Traynor Monoblock II preamp pedal

Postby johnk » 28 Jul 2016, 20:33

here's the PCB layout for it:
http://johnkvintageguitars.homestead.co ... allest.png

and the trace for etching (print at 800dpi!):
http://johnkvintageguitars.homestead.co ... allest.jpg

For this message the author johnk has received thanks: 8
287m (28 Jul 2016, 20:45), aishabag23 (06 Feb 2017, 16:59), deltafred (08 Jan 2017, 14:49), Intripped (28 Jul 2016, 20:48), J0K3RX (29 Jul 2016, 04:58), rcustoms (29 Jul 2016, 12:31), V1nce69 (28 Jul 2016, 20:57), Zokk (28 Jul 2016, 22:03)
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Re: Traynor Monoblock II preamp pedal

Postby 287m » 28 Jul 2016, 20:48

AWESOME as always Johnk! :applause:

errr, where the scheme Johnk?
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Re: Traynor Monoblock II preamp pedal

Postby johnk » 29 Jul 2016, 06:33

Image

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Re: Traynor Monoblock II preamp pedal

Postby sonicblaze » 02 Jan 2017, 03:28

Any chance you have a full list of parts (quantities of resistors/diodes/etc) before I go create my own BOM off Mouser?

Also, whats the black PCB board in the bottom right corner of your picture? Is that the input/output relay you spoke of?
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Re: Traynor Monoblock II preamp pedal

Postby stringsthings » 08 Jan 2017, 11:05

This looks and sounds really cool. It would be nice to take a break from the guitar projects and do one for the bass.
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