Clearance Items

Tube Converter - Yellow Jacket®, YJ7591
Package of 2
The YJ7591 is a specialized, current-limiting/voltage-conditioning adapter for use in most amplifiers that use 7591 output tubes. Only the triode version will provide a noticeable power reduction. The ground wire connects to chassis-ground for cathode-biased amplifiers. All Yellow Jacket® converters come with JJ Brand EL84/6BQ5 vacuum tubes.
  • All Yellow Jacket® converters come with JJ Brand EL84/6BQ5 vacuum tubes.
  • Converts most audio amplifiers with 7591s and similar-based tubes to EL84s without modification or rebiasing.
  • Converts: Class AB to Class A operation
  • Drops Output Power: Slightly.
  • Safe for all common amplifiers and transformers.

Yellow Jacket® converters are a type of specialized adapter which permit the use of EL84/6BQ5 power tubes in place of 6V6, 6L6, EL34, and 7591 type vacuum tubes.
Starting at $38.21
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Originally: $44.95
Wrench Set - Boxed Set, assorted sizes
Package of 78
Includes 12 pieces each of 1.27mm, 1.5mm, 2.0mm, 2.5mm, 6 pieces each of 3.0mm, 4.0mm, 5.0mm, 7.0mm, 8.0mm
Vacuum Tube - 6689 / E83F, Pentode, Wide Band Amplifier
Special quality pentode designed for use in telephone equipment.
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Originally: $39.90
Vacuum Tube - 6FH5, Triode, HF
Neutrode triode tuner in the 7 pin miniature construction. It is designed for use in grounded cathode RF amplifiers, with the neutrode construction providing a lower grid to plate capacitance with consequent ease of neutralization.
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Originally: $5.90
Vacuum Tube - 6MJ6, Beam Power Pentode
Novar type beam power tube used as a horizontal-deflection amplifier in color and black-and-white television receivers.
Vacuum Tube - KT150, Tung-Sol
Package of 2
Tung Sol KT150 power pentode tube. Made in Russia. With a massive plate dissipation of 70 watts, the Tung-Sol KT150 is the most powerful octal beam tetrode ever produced. A pair of KT150s can allow an amplifier with a power output approaching 300 watts to be built. The Tung-Sol KT150 glass envelope is a special egg shaped balloon that was developed to improve thermal dissipation and maintain a superior vacuum for the best sound. The fact that the glass envelope has no flat sides means the Tung-Sol KT150 has no problems with microphonics.
Coil - Miniature adjustable coil, 70, oscillator
Coil is similar to Miller number 70-OSC oscillator coil. Their small physical size and the fact that they can be adjusted to the inductance required make these coils ideally suited for replacement in broadcast band receivers. The 70 Oscillator coil has a primary and a tapped secondary. These coils are for use in all common padded and unpadded oscillator circuits.
Tube Converter - Yellow Jacket®, YJ7591, Converter Only
This Yellow Jacket converter is a specialized adapter which permits the use of EL84/6BQ5 power tubes in place of 7591A type tubes. Yellow Jacket converters not only re-arrange the pin locations of the tubes but also provide the necessary current limiting on the screens and cathode. Yellow Jacket block the amplifier's grid bias voltage, which configures the EL84/6BQ5 into a class A self adjusting bias circuit. Tubes are not included. Manufacturer recommends the JJ EL84/6BQ5.