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Handy Tip:
Due to our automated systems, orders paid by using PayPal
are processed first and shipped earlier.
*Does not apply to PayPal
transactions using eCheck
Handy Tip 2:
We sell and ship to the United States only.
Includes Alaska, Hawaii, and U.S. territories such as Guam, US
Virgin Islands and Puerto Rico, and military APO and FPO addresses.
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Modification Kits
"Modding" your tube amplifier should be undertaken only if you have some experience in working in tube amplifiers, and understand the dangers of high voltage and how to work around it safely. You will need experience in soldering,
and have soldering / de-soldering equipment (available here). With certain kits, you will also need a multimeter (available here).
If you are unsure of your qualifications or abilities to safely perform these
tasks, we strongly recommend that you enlist an experienced individual to
install these modifications.
Check back often as the list of available 'mod' kits grows.
Fender® is registered trademark of Fender® Musical Instrument Co.
Peavey® is registered trademark of Peavey® Electronics Corporation.
Marshall® is registered trademark of Marshall® Amplification PLC. |
VSM-1 Fender® Volume Sensitivity Mod Kit
Fender Hot Rod Deluxe, Hot Rod DeVille, Blues Deluxe and Blues DeVille amps only
$16.95
Now fixes both the drive channel master volume control as well as the clean
channel volume control!
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Volume Sensitivity Mod for Fender® Amps
This kit is designed to fix the overly sensitive master volume control in the drive channel,
as well as the overly sensitive volume control in the clean channel of the
following Fender amps: Hot Rod Deluxe, Hot Rod DeVille, Blues Deluxe and Blues DeVille amplifiers. All of these models have problems with their
volume controls being too touchy. If you turn up the volume to "2", you're being blasted out of the room. It's difficult to find a moderate volume setting - the control is very touchy between "1" and "2". Turning it above "2" doesn't increase the volume much more. This mod replaces the
pots in the clean volume and in the drive channel master volume positions with
the correct values that Fender engineers should have used. The amp's
volume controls become much less sensitive and offers a nice linear increase in volume so that you can easily control the proper volume setting.
Note: Requires soldering and desoldering capability, chassis disassembly and front panel PC board removal (removal of all pot knobs and nuts, and nuts on jacks, as well as removal of internal screws on the PC board).
Full instructions included.
VSM-1 Fender® Volume Sensitivity Mod Kit
Fender Hot Rod Deluxe, Hot Rod DeVille, Blues Deluxe and Blues DeVille amps only. Contains replacement pots and complete detailed instructions.
$16.95
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Blackface Kit for Silverface Fender® Amps
(Picture for illustrative purposes only - actual kit components will vary from this photo)
Fender® Blackface Kit
Stock No: FBK-1x (specific to particular model)
$24.95 (with vintage parts)
$19.95 (with modern parts)
A customer's review ...
I said I would get back to you about my Super Reverb and how the Blackfacing went ...
In short the amp sounds great. This old beat up chassis/worst of the Silverface circuits (arguably) now looks and sounds like a boutique amp just off the showroom floor. The overdrive is where the difference really shines. The amp just has more life now and has a creamy smooth overdrive ...
A fresh pair of matched 5881’s I had stashed around really made the difference. Without changing anything in the bias circuit again the 5881’s were 10mv when plugged in and easily could be ranged through to 32mV. I settled at 25mV and the tubes are within a hair of each other, and most importantly sound great when clean or overdriven.
Jeff P., Bloomington, Illinois
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Blackface Kit for Silverface Fender® Amps
This kit changes the design of your late 60's or 1970's vintage Silverface Fender® Amp to the original "Blackface" amps of the early-to-mid 1960's. Most players agree that the pre-CBS blackface amps sounded much better than the pale-imitation silverface successors designed by the CBS engineers. With this kit, you can take your amp back to the Leo Fender® design. In addition, you also restore the bias-setting capability of the amp, replacing the somewhat useless "balance control" of the silverface. These modifications are completely reversible, and no permanent changes to the chassis (such as drilling holes, etc) are required.
Available with either vintage or modern type components.
Sorry, but this won't change the "cosmetics" of your amp - it will unfortunately still have a silver front panel. :-(
All components and complete instructions included. You'll need to add: Soldering equipment, de-solder equipment, solder, hand tools, multimeter.
Note: Read before ordering!
Not for reissue amps (1980's-present). Not for the Ultra-Linear series of amps, such as the silverface 135 watt Twin Reverb of the late 70's / early 80's.
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(Picture for illustrative purposes only - actual kit components will vary from this photo)
Fender® Bassman Bias Modification Kit
Stock Number FBBM
$12.95
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Fender® Bassman Bias Modification
This mod kit changes the bias circuit in the AB165 Fender® Bassman back to the vastly superior bias adjustment found in the AA864 version.
This mod is only applicable to the AB165 model Bassman (check the tube chart inside the amp cabinet to determine which version you have).
All components and complete instructions included. You'll need to add: Soldering equipment, de-solder equipment, solder, hand tools. To adjust the bias after the modification is complete, you'll need a bias adjusting instrument and meter, such as our BiasPlug.
Fender® Bassman Bias Modification Kit
Stock Number FBBM
$12.95
<Note: The FBBM kit contains "vintage" components (carbon composition resistors) to maintain the vintage integrity of your Fender amplifier>
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(Picture for illustrative purposes only - actual kit components will vary from this photo)
 The EL-34 Power Tube
(Note: EL34 tubes not included with this kit - can be purchased separately here.)
Fender® EL-34 Conversion Kit
Stock No: F34-1
$11.95
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Fender® Amp Conversion to EL34 Tubes
Any vintage Fender® Amp that uses 6L6 power tubes can be converted to EL34 tubes. Now, the useful life of the EL34 is somewhat shorter than the 6L6, the change in tone quality may make some players feel that it's a good trade-off.
This mod is completed in the output section and also in the bias section of the amplifier. All needed parts are included except for the EL34 tubes. We do carry the EL34 tubes - you can purchase them here.
Note: This vintage Fender mod kits uses "modern" replacement components - metal film resistors, for example. This kit is not available with "vintage" components (such as carbon composition resistors).
Components (except for the tubes) and complete instructions included. You'll need to add: Soldering equipment, de-solder equipment, solder, hand tools, and a multimeter to adjust the bias/balance. To adjust the bias after the modification is complete, you'll need a bias adjusting instrument and meter, such as our BiasPlug.
Fender® EL34 Conversion Kit
Stock Number F34-1
$11.95
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(Picture for illustrative purposes only - actual kit components will vary from this photo)
Fender® Tone-Tweaking plus Dual-Channel Reverb/Vibrato Conversion Kit
Stock No: DRV-1V
$17.95
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Fender® Amp Tone Tweaking plus Dual Channel Reverb and Vibrato
Vintage blackface and silverface Fender® Amp with two channels (Super Reverb, Twin Reverb, Pro Reverb, etc) were designed with a normal channel and a "vibrato" channel. The reverb and vibrato only worked in the vibrato channel by design. But you can tweak the tone quality on the normal channel and also add reverb and vibrato to the normal channel as well (your existing reverb and vibrato controls will control the reverb for the normal channel - no extra controls or drilling of the chassis is required). The result is an amplifier
with the original sound on the vibrato channel, but a distinctly different tone characteristic in the normal channel, along with the option for reverb and/or vibrato. Add an external A/B box for switching, and you have increased the versatility of your Fender®.
<Note: The DRV-1V kit contains "vintage" components (carbon composition resistors and cloth-covered wire) to maintain the vintage integrity of your Fender amplifier>
Components and complete instructions included. You'll need to add: Soldering equipment, de-solder equipment, solder, and hand tools.
Note: Read before ordering!
Not for reissue amps (1980's-present).
Fender® Tone-Tweaking plus Dual-Channel Reverb/Vibrato Conversion Kit
Stock No: DRV-1V
$17.95
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(Picture for illustrative purposes only - actual kit components will vary from this photo)
Dunlop GCB-95 Zakk Wylde
Crybaby Mod Kit
Stock No: ZWMK-1
$21.95
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Dunlop Zakk Wylde Crybaby Wah Modification Kit
This mod is designed to modify your stock GCB-95 Crybaby into the popular Zakk Wylde Crybaby. Components (including the infamous Fasel inductor) and instructions included to modify the existing circuit board to match the identical circuit of the Dunlop Zakk Wylde Crybaby Wah
This mod is designed only for the standard GCB-95 pedal, and only for those made since 1990, but before the GCB-95F models. Important Note: it is not possible to mod the new GCB-95F pedal using this kit. If the PC board in your pedal looks like this, this kit will not work!
Components and complete instructions included. You'll need to add: Soldering equipment, de-solder equipment, solder, and hand tools.
Note that the Zakk Wylde Signature Crybaby sells online typically for $129.95. The original GCB-95 crybaby is only $79.95. Get the same sound as the Zakk Wylde Crybaby and save money!
Dunlop Zakk Wylde Crybaby Modification Kit
Stock No: ZWMK-1
$21.95
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(Circuit board not included - just replacement components for the existing PC board)
Dunlop GCB-95 Crybaby Mod Kit
Stock No: DCBMK-1
$12.95
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Dunlop Crybaby Wah Modification Kit
This mod is designed to change the characteristics of the wah sound from your stock Dunlop Crybaby to a tone that is much more pleasing to most people - and more like many of the vintage wahs from the late 1960's. This is accomplished without changing the stock inductor.
This mod is designed only for the standard GCB-95 pedal, and only for those made since 1990, but before the new GCB-95F models. Important Note: it is not possible to mod the new GCB-95F pedal using this kit. If the PC board in your pedal looks like this, this kit will not work!
This mod makes the wah sound a bit thicker, with a little more bass and midrange response. The wah sound is also a little more vocal sounding (a more pronounced W-a-a-a-a-h), and it has a little bit more gain than the stock design.
Components and complete instructions included. You'll need to add: Soldering equipment, de-solder equipment, solder, and hand tools.
Dunlop Crybaby Wah Modification Kit
Stock No: DCBMK-1
$12.95
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Dunlop GCB-95 Crybaby Mod Kit
Stock No: CBTB-1
$19.95
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Dunlop Crybaby True Bypass Modification Kit
This mod is designed to install "true bypass" into your Crybaby GCB-95 pedal. True bypass means that the wah circuit is totally and completely removed from the signal path when the pedal is in the bypass mode, so that the pedal will stop sucking the life out of your tone when the wah is turned off.
This mod is designed only for the standard GCB-95 pedal, and only for those made since 1990.
Important Note: it is not possible to mod the new GCB-95F pedal using this kit. If the PC board in your pedal looks like this, this kit will not work!
Components and complete instructions included. You'll need to add: Soldering equipment, de-solder equipment, solder, and hand tools.
Dunlop Crybaby True Bypass
Wah Modification Kit
Stock No: CBTB-1
$19.95
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Safe Voltage Discharge Cable
Stock No: SVDC-2
$11.95
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Tube Amplifier Safe Voltage
Discharge Cable
This cable is designed to help you work safely inside your tube amplifier. The first step, of course, is to always unplug the amplifier from the AC supply. It's also a good idea to let the amp "rest" for a period of time before removing the chassis, in order to let the high voltage bleed off.
This discharge cable will help ensure that you minimize the possibility of getting shocked by stored voltage in the amplifier. The clip connects to a chassis ground. The probe allows you to discharge high voltage points in the amp safely through a fixed 10K - 2 Watt resistor embedded in the cable lead. This is much preferred to using a direct short to discharge capacitors ... it's safer, avoids sudden arcs and loud pops, and avoids a sudden discharge shock to the filter capacitors.
Instructions included.
Safe Voltage Discharge Cable
$11.95
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