Amp Mod Kit - MOD® Kits, Bass to Tremolo Conversion Kit

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Amp Mod Kit - MOD® Kits, Bass to Tremolo Conversion Kit

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This kit adds tremolo to silverface Fender® Bassman amps such as the Bassman 70 or Bassman 100. Using the tube from the Bass Instrument channel, the circuit is modified into the classic tube tremolo circuit. The Volume and Treble knobs become the Speed and Intensity controls while the Bass knob is replaced with a jack for the footswitch. The Bright switch becomes an On/Off switch for the tremolo when not using a footswitch. All parts required to convert a silverface Bassman are included in the kit along with detailed picture instructions. Optional footswitch P-H470 is sold separately.

This kit will require several tools. If you don't have these tools, we have them available!

Tool Suggested
Multi-Meter S-Z3220
Soldering Iron S-TWLC100
Solder S-T9000X
Desoldering pump, bulb, or braid S-T7874B
Wire Strippers S-T105SCGV
Wire Cutters S-T170M
Needlenose Pliers S-TNN7776
Product Measurements by Type
No measurements are currently available for this product. Please contact us if you have any questions.
Packaging Information
Packaging Dimensions8.8 in. × 6 in. × 1.3 in.
Weight (Packaging)0.583 lbs.
PDF: InstructionsAll Models

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Specifications, Files, and Documents

PDF: Instructions Instructions799.62 KB

Questions and Answers

Click each question to see its answers.
Asked by Anonymous on August 27th, 2015.
August 27th, 2015
Staff Member
As you would be using the bass channel as a tremolo unit, that is no longer an input channel and you are down to one working channel.
Asked by Anonymous on October 14th, 2015.
October 15th, 2015
Staff Member
Top Contributor
This circuit uses an LDR/optocoupler to achieve a tremolo effect.
Asked by Anonymous on April 24th, 2019.
April 24th, 2019
Staff Member
This is the type with the optocoupler.

Product Reviews

5.00 out of 5 based on 1 reviews
- August 1st, 2011
5 out of 5

This kit has brought new life and excitement to my Bassman 100 and the tremolo effect is excellent! I love the sound of vintage tube tremolo.