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

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SKU:	K-930
Item ID:	001825

Price: $64^.95

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Type

Effect Pedals

Brand

Mod Kits

Build your own tube preamp 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.

Operates on a 9V 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.

UPC/EAN: 609722124416

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Specifications, Files, and Documents

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Troubleshooting Supplement (190.64 KB) persuader_troubleshooting_supplement.pdf

Schematic (72.9 KB) the_persuader_schematic.pdf

Instructions (375.03 KB) persuader_instructions_r1.pdf

Product Measurements (click to expand)


Type	Value
Weight	0.95 lbs.
Packaging Dimensions	8.4 in. x 6.1 in. x 1.5 in.

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Product Reviews

5.00 out of 5 based on 1 reviews

Great kit. Easy to build. Great instructions. All you need is solder and an iron. Did it over a couple evenings. I play it thru a Randall transistor amp and it definitely gives it that tube amp feel and sound. A noticeable improvement. My only concern is that the tube will get stepped on and broken but I guess a replacement only costs $10 or so. It's worth the risk. Also be very careful handling the mosfet transistor as the leads can easily break. Otherwise it's a great kit well worth the money. I would recommend it to my friends. Cheers.

Patten Guitars - September 20th, 2015

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Questions and Answers

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I have mine built. And I have good test numbers, DC, except pin 7. My chinese tube gave me -40.9mV. A new JJ gave me 88.7mV. I have signal clean, but nothing for overdrive. I can't find anything wrong. But there must be something. 4 answers

Asked by Anonymous on December 9th, 2015.

1 person subscribed to this question.

Answers (4)

JustinG

Staff Member

Top Contributor

December 10th, 2015

The measurements at pin 7 are good. I would consider them to be close enough to zero because -40.9 mV = -0.041 V and 88.7 mV = 0.089 V. Usually, we prefer a list of all the DC voltages so we can be certain nothing is unusual. The next step after taking the DC voltage measurements is to take AC voltage measurements along the signal path. Below will be a link to a PDF which explains how to measure the AC output directly from your guitar. Once you've measured the output from your guitar, you can plug into the Persuader and reference the AC Voltage (Signal) Test Points drawing from the troubleshooting supplement to find where the signal stops getting through. Those AC test points follow the signal path in order from the input (1) to the output (12).Below you'll find the address to the PDF. https://www.modkitsdiy.com/sites/modkitsdiy.com/files/product_files/persuader_troubleshooting_supplement.pdf

Anonymous

December 12th, 2015

Ok starting with DC voltages.. A. 9.43mv B. 9.04mv C. 6.90mv D. 8.66 E 6.86 F. -041.0 G. 1.5 H. 3.5 I 7.1 that's with pedal vol/gaindown how with pedal vol/gain up. A. 9.43 B. 8.52 C. 6.38 D. 8.17 E. -065.0 F. -056.0 G. 1.3 H. 2.1 I. 4.26 The ac voltage test yeilds very low mv or constant Vac..The tube gets warm. Glows a bit. strumming the guitar has no effect vol/gain up or down, either footswitch position. something seems to be wrong in the power delivery...

Anonymous

December 12th, 2015

vol/gain down. A through I... 9.42, 9.04, 6.90, 8.66, -042.1, 1/6, 3/5, 7.5. vol/gain max 9.43, 8.52, 6.38, 8.17, -065.0, -0056.0. 1.3, 2.1, 4.26 .. AC tests yields diddely - some very low mV and sometimes a constant 2.etc., vac. strumming has no effect either pedal position. my power isn't getting to or through the tube? something like that?

JustinG

Staff Member

Top Contributor

December 15th, 2015

Hello, please contact info@modkitsdiy.com and forward them your results. They will be able to offer you assistance with the kit.

Is the tube heater used? If not how does it work?1 answers

Asked by Anonymous on February 17th, 2016.

1 person subscribed to this question.

Answers (1)

JustinG

Staff Member

Top Contributor

February 17th, 2016

Yes the heater is definitely used. This is the reason why the pedal draws a large amount of current and works well with an AC adapter.

I know this probably sounds quite silly, but I am going to ask anyway because there is probably a simple solution that I just can't see for some reason. Anyway, I am going along pretty good with the soldering and what-not, but I have become stumped on the weirdest thing. I can't get the tube socket holes to line up with the holes on the chassis and the holes on the tube shield. I have been fiddling with it for a long time, and it appears to me that the holes on the tube shield force the screws inward so they will not fit into the tube socket. I can get the top one threaded, but even when the nut is at its loosest, it appears the hole on the tube socket is off and for the life of me I can't get it to line up. Am I just crazy, or did I get a bum chassis or tube socket where the holes are not aligned properly?1 answers

Asked by andy.funke on July 6th, 2016.

1 person subscribed to this question.

Answers (1)

Matt H.

Staff Member

July 6th, 2016

We are sorry you are having trouble with your kit. Please contact Mod Kits DIY at: https://www.modkitsdiy.com/contact They are very friendly and will be able to help you.

I have one plugged into a pigtronix 18v ac/dc adapter and it loves it. What is the highest voltage we can send through this pedal before it cooks the transistor? 1 answers

Asked by Anonymous on August 29th, 2016.

1 person subscribed to this question.

Answers (1)

Matt H.

Staff Member

August 30th, 2016

Please contact the designers of this pedal at: https://www.modkitsdiy.com/contact

Can I put a 12au7 vacuum tube in the Persuader or must it always be a 12ax7? And can I build this without the 9 volt battery option and only use the power supply for power. Thanks in advance.1 answers

Asked by Anonymous on March 29th, 2017.

1 person subscribed to this question.

Answers (1)

Matt H.

Staff Member

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