Meter Give your audience something to watch as you play.Į元4 Compatibility Go Brit with E元4 power tubes. Measuring Jacks Safely and conveniently measure power tube bias.Ĭhannel Jumper Switch Leave your patch cord at home.Ĭathode Bias Switch Standard fixed or 5E5 Pro style round tubey warmth andĭumble Tweedle Dee Mods Howard Dumble modified 5E3 Deluxe Input Jacks Instead of Four Eliminate the "Low" jacks. Jack Simple way to feed the PA and recording rig. More balanced cathodyne output reduces nasty "double frequency" distortion.įX Loop With True Bypass Passive FX loop with bypass switch. Paul C Mod - Cathodyne Phase Inverter Fixed Bias Power Switch Pentode / Triode switch to cut power almost in half. In External Box External box goes between your amp and speaker to dump
Power Switch Attenuation at the flip of a switch.ġ0% Power Jack Use your Aux jack as a 10% output jack Preamp Bias Switch Hot - Cool - Normal preamp tube bias with and without Tune the overdrive tone of a high gain preamp.īoost Switch Add more preamp gain for more dirt.ĭivider Reduce gain at the flip of a switch. Will cascade the Normal channel into the Bright channel for a high gain preamp. The preferred master volume for cathodyne phase inverter amps. Volume + Vox Cut Control Master volume AND late-in-the-circuit tone "Lead" Channel Tighten up and modernize one channel's clean and overdrive tone. 'ice pick' Highs If your speakers are too shrill this simple, subtle cap can help. Keep bass for fat cleans, cut bass for tight overdrive.
Mid Tone Control Easy to make mid control. Raw pot allows variable tone stack bypass. Stack Bypass) Switch Remove all traces of the TMB tone stack at the flip of a Solid State Rectifier Switch Saggy or firm rectification at the flip of a Tap your center tapped power transformer to create a 50v bias tap.Īdjustable Bias for Bridge Rectifiers Tap your bridge rectifier to create a Normal / None / Heavy selectable feedback.īias Adjust your power tube bias for max output and sweetest tone.Ī Balance Pot Adjustable bias with a balance pot to evenly biasĪdjustable Balanced Bias Using Two Bias Pots Adds a second bias pot to evenly bias unmatched power tubes. See these links for modifications specific to theģ-Way Negative Feedback Switch My favorite tube amp mod. The following mods are not specific to any particular amp model and apply to With the other hand because a lethal shock can run between your arms through your Never touch the amplifier chassis with one hand while probing If you have notīeen trained to work with high voltage then have an amp technician service yourĪmp. WARNING : A tube amplifier chassis contains lethal high voltageĮven when unplugged-sometimes over 700 volts AC and 500 volts DC. Have comments or corrections? Email rob at: robinette at Robinette Generic Tube Amplifier Modifications The Trainwreck Pages ] [ Fender Input Jacks
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