Fender™ Vintage
Modification Kits

We have modification kits primarily for vintage blackface and silverface amps from the 1960s and 1970s



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FENDER "BLACKFACE" KIT  This kit changes the circuit design of your late 60s or 70s vintage Silverface Fender™ Amp to the original "Blackface" amps of the early-to-mid 60s.   Most players agree that the pre-CBS blackface amps sounded much better than the 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 in place of the "balance" control.   These modifications are completely reversible, and no permanent changes to the chassis (such as drilling holes, etc) are required.  The kit includes 9 resistors, 4 capacitors and instructions.   Note:  This kit does NOT apply to the silverface Bantam Bassman, Bassman, Bassman Ten, Bassman 100, Bronco, Champ, Deluxe Reverb, Musicmaster Bassman, Princeton Reverb, or VibroChamp.

Part #FBK-1

$11.95  


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FENDER NORMAL CHANNEL REVERB AND VIBRATO MOD  This mod incorporates the existing reverb and vibrato on the Normal Channel of Fender vintage 60s and 70s Blackface and Silverface amp.    NOTE:  This mod is ONLY for dual channel amps with reverb and vibrato in the vibrato from the Blackface and Silverface era (1973-1980), and does not apply to the Fender Bassman.   Also not applicable to single channel amp models such as the Champ, Bronco, VibroChamp, Princeton, Princeton Reverb.  Does not apply to reissue amps.  Does not apply to amps in the Blackface era that did not have reverb, such as the Pro Amp, Showman Amp, etc.

Part #DIDRV-1

$4.95  


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FENDER 65 DELUXE REVERB REISSUE "DE-FLUB" KIT This kit upgrades the first-stage power supply filtering in your Fender Deluxe Reverb Reissue Model from 1991 to the present.  Also fits the 68 Custom Deluxe Reverb from 2012 to the present.   This modification upgrades the front end of the power supply in the DRRI to Blues Deville specs.  BIG improvement to bottom end delivery at any volume, or as we like to say, "De-Flubs" the bass.  

Applies only to the 65 Blackface Deluxe Reverb Reissue and the 68 Silverface Custom Deluxe Reverb.    Not for original vintage Deluxe Reverb amps from the 60s and 70s.

Part #FDRK-1

$11.95  


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Fender™ RCA VIBRATO SHORTING PLUG by Revisit™ - GOLD-PLATED.   Did you know that on vintage Fender™ amps (Blackface, Silverface), the reverb will work without a footswitch plugged in, but the vibrato will not?   This handy-dandy little RCA shorting plug will fix that problem, if you do not own or prefer not to use a footswitch on your vintage 60s or 70s Fender™ amp.   This version is made of gold-plated brass for a low resistance connection and highest immunity to oxidation.  Just plug this little RCA plug gadget into the vibrato footswitch jack on the back panel, and your vibrato will come alive.    Turn the intensity knob to zero to cut out the vibrato when this plug is inserted.  Note:  Does not apply to Bronco, Vibro Champ, Princeton, or Princeton Reverb amps.  Inserting this plug turns the vibrato off in those models, removing the plug turns it on.
Part #FSP-200

$2.50

 


(Picture for illustrative purposes only - actual kit components will vary from this photo)

 
FENDER "S-L-O-W-E-R  VIBRATO" KIT FOR VINTAGE BLACKFACE AND SILVERFACE  This kit changes the circuit design of the vibrato to slow down the slow end of the vibrato speed control considerably, giving a much wider usable speed range.    Fast speed remains virtually unchanged, and the intensity remains the same.   Jazz players especially love the slower vibrato.  The official Fender vibrato "tick cure" is also included in this kit, as listed on a Fender service bulletin from several years ago.   This kit is applicable to all two-channel vintage Blackface and Silverface amps from the 1960-1970 era.   This kit does not apply to Bronco, Princeton or VibroChamp circuits.  Kit includes necessary parts and instructions.   Soldering capability is required.

Part #FSVK-100

$3.50  


(Picture for illustrative purposes only - actual kit components will vary from this photo)

 
FENDER "S-L-O-W-E-R  VIBRATO" KIT FOR REISSUE AMPS This kit changes the circuit design of the vibrato to slow down the slow end of the vibrato speed control considerably, giving a much wider usable speed range.    Fast speed remains virtually unchanged, and the intensity remains the same.  Fits `65 Twin Reverb™ Reissue, `65 Super Reverb™ Reissue, `65 Deluxe Reverb™ Reissue, '65 Princeton Reverb™ Reissue, `68 Custom Twin Reverb™, `65 Custom Super Reverb™, `68 Custom Deluxe Reverb™, '68 Custom Princeton Reverb™.  Kit includes necessary parts and instructions.   Soldering capability is required.

Part #FRSVK

$1.25  


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MULTI-TURN TRIM POT, 50K Ohms, TOP ADJUSTMENT SCREW.  This 3/8" X 3/8" X 1/8" pot may be used to modify some amplifiers and install a bias adjust control.    50k Ohms, 0.5 watts, 25 turns. This is the pot most often used to add adjustable bias to the Fender Blues Junior.
Instructions for the Blues Junior Bias Mod are found here.
Part #3296W-B50K
$2.79  


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JACK, 1/4", MONO, CLOSED CIRCUIT (SHORTING), WIRED, Switchcraft, LONG BUSHING
Change the plastic J-506 jack in your Blues Junior to this rugged Switchcraft jack.   Watch this video to see if you wish to consider this project:  https://www.youtube.com/watch?v=-i4MR4WPDAo   You will need to provide about 6 inches of thin insulated stranded wire for this conversion (not included).
Part #J-L12A
$2.99




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POT - CTS, 3/8" BUSHING, WITH DPST PUSH-PULL SWITCH - VARIOUS VALUES
24 mm carbon composition. 300° rotation. 1/2 watt, 500VDC rating. 1/4" diameter smooth shaft, 3/8" bushing, solder lugs, with push-pull DPDT (six terminal) switch.  For hand-wired American made amplifiers such as vintage Fender and others.  Available in A10K, B10K, B25K, C50K, A100K, B100K, A250K, B250K, A500K, A1M, or C3M. 

With the proper rewiring, the A1M version of this pot may be used as the master volume with pull switch in the silverface Fender amps from the 1970s.  Note:   Will fit most silverface amps, as long as the angle between the front panel and the base of the chassis is greater than or equal to 65 degrees.    Not all Fender silverface amps have the same angle on the front panel.   Those with angles less than 65 degrees will not have sufficient room to mount the pot.

Wiring for the switch is connected via 6 solder points (holes) on the PC board, immediately below the 3 pot terminals.    When the pot knob is pushed in, C1 is connected to 2, and C2 is connected to 4.  When the knob is pulled out, C1 is connected to 1, and C2 is connected to 3.    Other values may be used in other positions for various modifications in vintage Fender amps, including pull boost, vibrato or reverb on-off, tone slope shift, etc.

 INCLUDES NUT & WASHER.
 

Part #P-DPPS-XX

Priced from $17.95 to $25.95
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FREE!   DOCUMENTATION FROM MARK MOYER FOR IMPROVEMENTS TO the FENDER™ CUSTOM VIBROLUX REVERB REISSUE.

Documentation only for changing the Fender™ Custom Vibrolux Reverb into a "hiss-free classic".   This download is the complete documentation of the famous Mark Moyer mods for the Custom Vibrolux.    the mods include the following sections, of which any or all may be completed:   1. Eliminate Reverb on Normal Channel, 2. Fuller, More Alive Reverb, 3. Shunting Cap for Parasitic Elimination, 4. Add Negative Feedback Loop (for a more traditional Fender sound, and less hiss), 5. Remove Protection Diodes (to prevent nuisance blowing of fuse and improved high-frequency response), 6. Ground Reference Resistors (for hum and hiss reduction), 7.  Add Adjustable Bias

Thanks to Mark Moyer and Jason McLaren for creating and annotating the documentation.

Free!


FREE!   DOCUMENTATION FROM BILL M FOR IMPROVEMENTS TO the FENDER™ BLUES JUNIOR.

Documentation only for improving the Fender™ Blues Junior.   This download is the complete documentation of the famous Bill M. mods for the Blues Jr.    The mods include the following sections, of which any or all may be completed:   1.  Standby Switch Installation, 2. Tone Stack Mod, 3. Coupling Cap Installation, 4. Power Supply Stiffening, 5. Twin Stack Mod, 6. Bias Control Installation, 7. Switchcraft Replacement Input Jack, 7. Upgraded Output Transformer. 

Sadly, Bill Machrone (Bill M) passed away on October 30, 2016.   

Free!

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