YJS Triode Yellow Jacket - Power Reducing Adapter

Yellow Jackets plug into the power tube socket of your amp and replace the power tube you are using with an EL84. This version will turn "Class AB Pentode" amps into a "Class A Triode" circuit, and can be used as long as the plate voltage is under 520 volts. As THD says, this covers 98% of guitar amps in use. They can also be used in home audio equipment.

The "YJSD Triode" model of Yellow Jacket provides further power reduction and smoother sweeter output distortion, reducing the amplifier's power by 70% to 90%. They can be used to replace 6V6, EL34, 6L6 and 6550 tube types without modification or rebiasing. In amps with four power tubes, you can replace two of the tubes with Yellow Jackets for a partial power reduction.

Using this style of Yellow Jacket will allow you to attain sweet, overdriven tube sounds while keeping the volume at a neighbor-friendly level. Total height of socket and tube is 5 3/8" or 14cm.

Note: The EL84 tubes are not included. Visit our EL84 / 6BQ5 Tube Types page for our full EL84 tube selection.

Home > DIY Corner > THD Products > Yellow Jackets

Availability: Usually ships within 24 hours.