Effects Pedal Kit - MOD® Kits, The Persuader, Tube Drive

Mod Kits
Effects Pedal Kit - MOD® Kits, The Persuader, Tube Drive image 1
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Effects Pedal Kit - MOD® Kits, The Persuader, Tube Drive image 4
Customer image:<br/>"inside"
Customer image:<br/>"painted and installed"
Customer image:<br/>"My new favorite pedal. I use an old (mid 60s?) GE 12AX7 and it sounds great!"
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Effects Pedal Kit - MOD® Kits, The Persuader, Tube Drive image 1Effects Pedal Kit - MOD® Kits, The Persuader, Tube Drive image 2Effects Pedal Kit - MOD® Kits, The Persuader, Tube Drive image 3Effects Pedal Kit - MOD® Kits, The Persuader, Tube Drive image 4
Customer Images:
Customer image: "inside"Customer image: "painted and installed"Customer image: "My new favorite pedal. I use an old (mid 60s?) GE 12AX7 and it sounds great!"

Effects Pedal Kit - MOD® Kits, The Persuader, Tube Drive

In Stock
Quantity in stock: 3

Build your own tube pre-amp pedal built around a 12AX7 tube. Go from clean, warm tone to smooth, real tube overdrive.

This kit includes pre-drilled die-cast aluminum enclosure and all parts with easy-to-follow instructions. All you need to provide is solder and soldering iron.

The Persuader allows for easy access to the tube, giving you the ability to quickly experiment with different tube brands and 12AX7 tube relatives. A JJ 12AX7 is included with this kit.

Operates on a 9 volt battery or AC adapter, which is not included. When completed, this pedal draws considerable current and battery life will be short. The Godlyke 9-volt adapter (M-PAS-S) may be purchased separately to power your new pedal.

Product Measurements by Type
Height with knobs/extrusions3.495 in.
Item Height1.375 in.
Item Length4.695 in.
Item Width4.015 in.
Packaging Information
Packaging Dimensions8.4 in. × 6.1 in. × 1.5 in.
Weight (Packaging)0.95 lbs.
PDF: SchematicAll Models
PDF: Troubleshooting SupplementAll Models
PDF: InstructionsAll Models
MPEG: Sound SampleAll Models

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Specifications, Files, and Documents

Sound Samples:

PDF: Instructions Instructions1.56 MB
PDF: Schematic Schematic205.84 KB
PDF: Troubleshooting Supplement Troubleshooting Supplement455.31 KB

Questions and Answers

Click each question to see its answers.
Asked by Anonymous on December 28th, 2015.
December 30th, 2015
Staff Member
Top Contributor
Yes, this kit will include the tube and enclosure.
Asked by Anonymous on March 27th, 2017.
Matt H
March 29th, 2017
Yes, you can substitute a 12AU7 for the 12AX7. Regarding the 9 volt option, please contact Mod Kits for more information at: info@modkitsdiy.com
Asked by Anonymous on April 2nd, 2017.
Matt H
April 5th, 2017
The battery will last about a half and hour. This includes the time when the pedal is not engaged.
Asked by Anonymous on April 4th, 2017.
Matt H
April 5th, 2017
Please contact MOD Kits at: info@modkitsdiy.com for more information on mods to this kit.
Asked by jpandise on April 5th, 2017.
Matt H
April 5th, 2017
Please contact MOD Kits at: info@modkitsdiy.com for more information on mods to this kit.
Asked by Anonymous on June 9th, 2017.
Matt H
June 9th, 2017
These kits use 22 AWG wire.
Asked by Anonymous on November 19th, 2017.
Matt H
November 22nd, 2017
Yes we recommend this for bass and it sound great!
Asked by apexelectric on January 11th, 2018.
Matt H
January 18th, 2018
The deluxe has an LED and a mini-toggled boost switch located at the top of the pedal.
Asked by Anonymous on June 1st, 2018.
Matt H
June 8th, 2018
This pedal runs at about ~125mA.
Asked by Anonymous on June 1st, 2020.
June 2nd, 2020
Staff Member
This may be a good option for what you are after, but we are unable to guarantee you will be able to achieve the clean tone in the video you linked to. You may also want to consider the Persuader Deluxe. amplifiedparts.com/products/effects-pedal-kit-mod-kits-persuader-deluxe-overdrive

Product Reviews

4.92 out of 5 based on 13 reviews
- December 9th, 2020
5 out of 5

You ALMOST "Had" me, untill I got to the part where this thing runs off of "9 Volt DC", [Starved Plate Design]

Translation = "Epic FAIL"!

- October 1st, 2017
5 out of 5

i got the persuader kit as an intro to electronics hoping to delve further into tube circuits. this kit got me hands on experience and a brief understanding of starved plate circuits. the pedal sounds amazing with different tubes and the kit is very accessible

- June 9th, 2016
4 out of 5

The Persuader tube drive was my first pedal kit. I would recommend this to anyone who wants to build there own tube pedal. Sounds very good,

- December 20th, 2015
5 out of 5

Worth every penny, instructions make the build easy, Also backs as a 12ax7 tube tester! This pedal can also be used as a booster pedal on the low settings. The sound clip does not do this pedal justice, has that distorted warm tube sound, quality parts, buy it!

- May 7th, 2014
5 out of 5

This is a good pedal choice if you have a single clean channel only amp. I am disappointed with this kit for the following reasons:

1. I didn't learn anything about how effects pedals work or what each individual component provided in the kit was for. All I learned was how to follow the assembly instructions, which are very well written and easy to follow. I guess I expected, this component is the first gain stage, sort of tutoring.

2. My pedal checks out on the test points with the correct voltages etc, but my pedal does not at all produce the results found in the sound sample. My volume pot works fine but does not increase volume beyond that of the amps boost function. The gain pot hardly works at all not engaging until max setting. The gain obtained from the pedal is much less than the gain from the gain channel.

3. there is really no way provided to check results as assembly is taking place. The trouble shooting procedures are not in depth enough to be of any real use. For example, what do you do when your voltage is high on tube pin 7?

This was a good experience and I am glad I tried this. It made me realize I would likely not enjoy building my own amp from a kit as, I would end up with an amp I already have and there is no real pleasure in wiring a tube socket or tinning the ends of hundreds of wires required to build an amp.

If this is your first effects pedal build then sort the kits low to high in price and choose the least expensive kit with the fewest components as your first kit. Also choose a pedal carefully and get something your amp doesn't already do.

- May 8th, 2013
5 out of 5

Bought this recently as a tube overdrive for my bass. This being my first experience building a pedal myself, I didn't want to go overboard with too many extras. I printed out the colored version of the instructions from the MOD website which made it very easy to read and decipher. It is true what some people are saying about the grounding issues between the terminals and the pots. I solved this with two small strips of electrical tape for redundancy. The build was very comprehensive and took me about 2 1/2-3 hours to complete. I too had a little difficulty fitting the chinese tube into the socket, but after a little fiddling and pin adjustment it went right in. The tone on this pedal, for bass, is awesome. I get a nice fuzzy tone with the gain all the way up and warm break up with it set a little lower. The volume output is not quite as high as I'd like it, but perhaps a different tube will solve this issue. Three cheers to a fun build and a great pedal!

- February 22nd, 2013
5 out of 5

As a avid DIYer and bass player I came across this site and immediately ordered the Persuader. After a few short evenings of soldering and assembling I was ready to test it out only to find that i wasnt getting any of the tube effect at all. One email to customer service pointed me in the right direction for troubleshooting and ended up having a bad mosfet which they promptly sent to me for free! Not only did I increase my soldering and wiring capabilities and get to troubleshoot a minor problem but now i am left with a totally KICK A$$ pedal that ROCKs! Also i picked up a few new tubes to modify the sound: jj803-s, sovtek LPS, and tubestore preferred series. So far the JJ long plate has the best break up for bass while the sovtek has a little to much break up, while the preferred series sounds good all around it fits a guitar sound better.

- November 3rd, 2012
5 out of 5

I highly recommend this for anyone looking for that nice responsive beefy tube overdrive tone or if you are looking to smooth out your tone. It is worth the work and it is educational. I recommend getting a 12au7/ecc802, I got mine from JJ and it gives more rich overdrive tones. Amplified parts shipped it immediately, I ordered it late at night and received it the next day.

- March 13th, 2012
5 out of 5

This was my first DIY pedal built. I had fun making it. It has a versatile fuzz tone, lower the gain and you have a cleaner drive tone, crank the gain control and you have a thick tubby fuzz tone. Great pedal for blues and classic rock. I will be posting my review on this great pedal on youtube.

Read the instructions throughly. The main problem I had was grounding problem, the two terminal strips along both sides of the 9 pin tube socket were touching both volume, gain pots and the tube socket base bracket. The spaces between these areas are so tight and can easily be shorted. The instructions pointed this out.

- March 10th, 2012
5 out of 5

Great fun to build this Pedal. A drawback is the gain pot, which does some nois while turning the knob.