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Yellow Jackets

Yellow Jackets® allow EL84 power tubes to be used in place of most common guitar amp power tubes, providing a "self-bias" Class-A configuration for the EL84 so that no bias adjustment is required.

EL84s have a tight and focused sound, and most converters will produce a substantial maximum power reduction making it easier to find that sweet, warm mix of preamp and power amp distortion at a lower volume.

For more information, see YellowJacketsTC.com

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P-YJSYJS, Yellow Jackets® Tube Converter
Multiple Options Available
This model of Yellow Jackets® converter, the YJS, is a specialized, current-limiting/voltage-conditioning adapter for use in most 20 watt to 100 watt amplifiers which use 6L6, EL34, 6550 or 6V6 output tubes.
  • All Yellow Jackets® converters come with JJ Brand EL84/6BQ5 vacuum tubes.
  • Converts: Class AB to Class A operation.
  • Drops Output Power: 50% to 70%.
  • Converts most audio amplifiers with 6L6s, EL34s, 6550s or 6V6s to EL84s without modification or rebiasing.
  • Safe for all common amplifiers and transformers.

Yellow Jackets® converters are a t
$118.00
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P-YJSHORTYJShort, Yellow Jackets® Tube Converter
Multiple Options Available
This model of Yellow Jackets® converter, the YJShort, is a specialized, current-limiting/voltage-conditioning adapter for use in most amplifiers which use 6L6, EL34, 6550 or 6V6 output tubes. This Yellow Jackets® converter is shorter than the standard Yellow Jackets® converter, allowing for use in amplifiers which do not have room for the original Yellow Jackets® converters.
$144.00
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P-YJCYJC, Yellow Jackets® Tube Converter
Multiple Options Available
This model of Yellow Jackets® converter, the YJC, is a specialized, current-limiting/voltage-conditioning adapter for use in most 20 watt to 100 watt amplifiers which use 6L6, EL34, 6550 or 6V6 output tubes.
  • All Yellow Jackets® converters come with JJ Brand EL84/6BQ5 vacuum tubes.
  • Converts most audio amplifiers with 6L6s, EL34s, 6550s or 6V6s to EL84s without modification or rebiasing.
  • Converts: Class AB to Class A operation.
  • Drops Output Power: 50% to 70%.
  • Safe for all common amplifiers and transformers.
  • Connects to chassis-ground for catho
$118.00
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P-YJUNIYJUni, Yellow Jackets® Tube Converter
Multiple Options Available
This model of Yellow Jackets® converter, the YJUni, is a simple pin-converting adapter for use in most amplifiers which use 6V6 output tubes or other similar based tubes such as the 6F6, 6G6, 6K6, 6Y6, etc.
  • All Yellow Jackets® converters come with JJ Brand EL84/6BQ5 vacuum tubes.
  • Converts pin configuration from 9-pin to 8-pin to allow certain 6V6, 6K6 and similar low-voltage circuits to use EL84 tubes.
  • Does not drop power.
  • Safe for all common amplifiers and transformers.
  • Great for adapting tube-testers to test EL84 tubes.
  • Perfect for THD Uni
$100.00
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P-YJ7591YJ7591, Yellow Jackets® Tube Converter
Multiple Options Available
This model of Yellow Jackets® converter, the YJ7591, is a specialized, current-limiting/voltage-conditioning adapter for use in most amplifiers which use 7591 output tubes.
  • All Yellow Jackets® converters come with JJ Brand EL84/6BQ5 vacuum tubes.
  • Converts most audio amplifiers with 7591s 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 Jackets® converters are a type of specialized adapter which permit the use of EL84/6BQ5 power t
Starting at $59.00
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P-YJ20YJ20, Yellow Jackets® Tube Converter
Multiple Options Available
This model of Yellow Jackets® converter, the YJ20, is a specialized, current-limiting/voltage-conditioning adapter for use in most amplifiers which use 6V6 output tubes, or other similar-based tubes, such as the 6F6, 6G6, 6K6, 6Y6, etc.
  • All Yellow Jackets® converters come with JJ Brand EL84/6BQ5 vacuum tubes.
  • Converts most audio amplifiers with 6V6s and similar-based tubes to EL84s without modification or rebiasing.
  • Converts: Class AB to Class A operation
    Drops Output Power: Does not drop power.
  • Safe for all common amplifiers and transformers.

Yell
Starting at $59.00
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P-YJRSolid State Tube Rectifier, Yellow Jackets®
This model of Yellow Jackets® converter, the YJR, is an adapter for use in most amplifiers which use 5AR4, 5U4, or 5Y3 tubes or other similar tubes. This Yellow Jacket® is a solid state device and as such does not come with vacuum tubes.
  • Converts most audio amplifiers which use a vacuum tube rectifier 5AR4, 5U4 or 5Y3 to a solid state device.
  • Safe for all common amplifiers and transformers.
All Yellow Jackets® have a two year warranty against manufactured defects.
$14.95
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P-YJNOSYJNOS, Yellow Jackets® Tube Converter
Multiple Options Available
The new Yellow Jackets NOS (New Old Stock) Tube Converter is a limited edition converter made for use in most amplifiers under 100 watts and using 6L6, EL34, 7027, or 6V6 output tubes. The converter lowers the overall power in your amplifier and gives your amp a unique vintage tone.
This NOS Yellow Jacket is designed with an NOS 6AQ5 seven-pin miniature beam power tube, which is included with the converter. The 6AQ5 was used on many vintage practice guitar amps in the 1950s as well as many film projectors in the past.
Starting at $86.00
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