Vacuum Tube Accessories

Tube Converter - Yellow Jacket®, YJC
The YJC is similar to the YJS, but for use in amps with cathode-biased power tubes. Cathode-biased power tubes have a bias resistor connected from their cathode to ground. The ground wire of the YJC is used to bypass the amp’s cathode bias components so the Yellow Jacket® converter’s internal bias components are used instead. 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 6L6s, EL34s, 6550s, or 6V6s and similar-based tubes 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.

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.
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Socket - 4 Pin, Jumbo, Ceramic Bayonet
Colors Available:
4-pin jumbo ceramic bayonet socket used for 211 and 845 tubes.
  • Top mount
  • 2-13/16" mounting centers
  • Available with standard or gold plated pins
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Socket - 4 Pin, Ceramic, Bayonet, China
4-pin ceramic bayonet socket used for 300B and 811 tubes.
  • Top mount
  • 2" mounting centers
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Terminal Board - three 9 Pin sockets, 2 x 14 lugs
Three socket. 2 rows/ 14 lugs per row, 6 mounting holes. Board dimensions 6 ¾" x 3". Terminals are not pre-wired. The distance between tube socket centers is 2.18".
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Tube Converter - Yellow Jacket®, YJ20
The YJ20 is for use in most amplifiers using 6V6 output tubes. The YJ20 is similar to the YJC but does not drop the plate and screen voltages. It is meant for use in lower power output amps (20 watts or less) when no power reduction is desired. The ground wire connects to the 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 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.

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.
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Tube Converter - Yellow Jacket®, YJ20, Triode version
The YJ20 is for use in most amplifiers using 6V6 output tubes. The YJ20 is similar to the YJC but does not drop the plate and screen voltages. It is meant for use in lower power output amps (20 watts or less) when no power reduction is desired. The ground wire connects to the 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 6V6s and similar-based tubes to EL84s without modification or rebiasing.
  • Converts: Class AB to Class A operation
  • Drops Output Power:50%.
  • 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.
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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.
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Tube Converter - Yellow Jacket®, YJ7591, Triode version
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: 50%.
  • 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.
Please Log In to view prices
Tube Converter - Yellow Jacket®, YJC, Triode version
The YJC is similar to the YJS, but for use in amps with cathode-biased power tubes. Cathode-biased power tubes have a bias resistor connected from their cathode to ground. The ground wire of the YJC is used to bypass the amp’s cathode bias components so the Yellow Jacket® converter’s internal bias components are used instead. 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 6L6s, EL34s, 6550s, or 6V6s and similar-based tubes to EL84s without modification or rebiasing.
  • Converts: Class AB to Class A operation
  • Drops Output Power: 70% to 90%.
  • 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.
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Tube Converter - Yellow Jacket®, YJS, Converter Only
Converter-only version of the P-YJS. Tubes not included. Requires an EL84 vacuum tube, such as:
  • T-EL84-EH (Electro-Harmonix)
  • T-EL84-GEN (Genalex)
  • T-EL84-JJ (JJ Electronic)
  • T-EL84-MUL (Mullard)
  • T-EL84-MP-PV (Peavey)
  • T-EL84-S-MP-GT (Groove Tubes)
  • T-EL84-SOVT (Sovtek)
  • T-EL84-TAD (Tube Amp Doctor)
  • T-EL84-TUNG (Tung-Sol)
  • T-EL84_6BQ5 (NOS)
  • T-EL844-JJ (JJ Electronic EL844)
  • T-EL84M-SOVT (Sovtek EL84M)

We also sell an EL84 sampler set containing 9 EL84 tubes:
  • T-EL84-SET

The YJS is a specialized, current-limiting/voltage-conditioning adapter for use in most 20 to 100 watt amps that use 6L6, EL34, 6550 or 6V6 output tubes. The YJS is for amps with fixed bias power tubes.
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Tube Converter - Yellow Jacket®, YJC, Converter Only
Converter-only version of the P-YJC. Tubes not included. Requires an EL84 vacuum tube, such as:
  • T-EL84-EH (Electro-Harmonix)
  • T-EL84-GEN (Genalex)
  • T-EL84-JJ (JJ Electronic)
  • T-EL84-MUL (Mullard)
  • T-EL84-MP-PV (Peavey)
  • T-EL84-S-MP-GT (Groove Tubes)
  • T-EL84-SOVT (Sovtek)
  • T-EL84-TAD (Tube Amp Doctor)
  • T-EL84-TUNG (Tung-Sol)
  • T-EL84_6BQ5 (NOS)
  • T-EL844-JJ (JJ Electronic EL844)
  • T-EL84M-SOVT (Sovtek EL84M)

We also sell an EL84 sampler set containing 9 EL84 tubes:
  • T-EL84-SET

The YJC is similar to the YJS, but for use in amps with cathode-biased power tubes. Cathode-biased power tubes have a bias resistor connected from their cathode to ground. The ground wire of the YJC is used to bypass the amp’s cathode bias components so the Yellow Jacket® converter’s internal bias components are used instead.
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Tube Converter - Yellow Jacket®, YJShort, Converter Only
Converter-only version of the P-YJShort. Tubes not included. Requires an EL84 vacuum tube, such as:
  • T-EL84-EH (Electro-Harmonix)
  • T-EL84-GEN (Genalex)
  • T-EL84-JJ (JJ Electronic)
  • T-EL84-MUL (Mullard)
  • T-EL84-MP-PV (Peavey)
  • T-EL84-S-MP-GT (Groove Tubes)
  • T-EL84-SOVT (Sovtek)
  • T-EL84-TAD (Tube Amp Doctor)
  • T-EL84-TUNG (Tung-Sol)
  • T-EL84_6BQ5 (NOS)
  • T-EL844-JJ (JJ Electronic EL844)
  • T-EL84M-SOVT (Sovtek EL84M)

We also sell an EL84 sampler set containing 9 EL84 tubes:
  • T-EL84-SET

The YJShort is shorter than the standard YJS converter, allowing for use in amps that do not have room for the standard converters.
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Tube Converter - Yellow Jacket®, YJS, Triode Version, converter only
Converter-only version of the P-YJS-T. Tubes not included. Requires an EL84 vacuum tube, such as:
  • T-EL84-EH (Electro-Harmonix)
  • T-EL84-GEN (Genalex)
  • T-EL84-JJ (JJ Electronic)
  • T-EL84-MUL (Mullard)
  • T-EL84-MP-PV (Peavey)
  • T-EL84-S-MP-GT (Groove Tubes)
  • T-EL84-SOVT (Sovtek)
  • T-EL84-TAD (Tube Amp Doctor)
  • T-EL84-TUNG (Tung-Sol)
  • T-EL84_6BQ5 (NOS)
  • T-EL844-JJ (JJ Electronic EL844)
  • T-EL84M-SOVT (Sovtek EL84M)

We also sell an EL84 sampler set containing 9 EL84 tubes:
  • T-EL84-SET

The YJS is a specialized, current-limiting/voltage-conditioning adapter for use in most 20 to 100 watt amps that use 6L6, EL34, 6550 or 6V6 output tubes. The YJS is for amps with fixed bias power tubes. (Fixed bias tubes have their cathode connected directly to ground and a negative DC voltage applied to their control grid).
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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.
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Tube Base - 8 Pin, Gold Coated Pins, 1.20" diameter
8 pin tube base with gold pins.
Outer Diameter: 1.20"
Inner Diameter: 1.16"
Height (not including pins or keyway): 0.79"
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Socket - 7 Pin, Miniature, Ceramic with Mounting Ring
Ceramic 7-pin socket with center shield and mounting bracket.
  • Convenient top or bottom mounting capabilities
  • 5/8” chassis hole required
  • 7/8” mounting centers
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Socket - Belton, Micalex, 8 pin octal, MIP
High insulated 8-pin tube socket commonly used for octal power tubes. Fits 1 3/16" to 1 1/4" chassis hole diameter. Applicable for use in all types of electric and electronic equipment using vacuum tubes. Features:
  • Panel saddle mounting
  • Easy mount with the saddle of extruded screw hole
  • Phosphorus bronze terminal pin with solder plating
  • Glassfiber filled PPS insulating material.
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Socket - Belton, Micalex, 8-Pin Octal, MIP, Flanged Holes
Belton 8-pin Micalex tube socket commonly used for octal based power, preamp, and rectifier tubes. Applicable for use with all types of electronic equipment using vacuum tubes. This version has circular extruded holes.
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Socket - 8 pin octal, Sleeve Connectors, 1" with Bracket
Ceramic Tube socket used for octal power tubes.
  • Chassis hole: 1” to 1-1/4” depending on mounting (Top: 1” to 1-1/16”, Bottom: 1-1/4”)
  • Mounting Centers: 1-1/2” with oblong mounting holes
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Socket - 8 Pin, 1.14" mounting hole
8-pin plastic tube socket commonly used for octal based power, preamp, and rectifier tubes.
  • 1-1/8” / 1.14” chassis hole required
  • Snap-in Mounting

*Uses P-SH12-1-31 or P-SH2-104-2
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Socket - 9 Pin, Miniature, Standoff Ceramic PC Mount
9-pin ceramic PC mount tube socket commonly used for preamp tubes or EL84 power tubes
  • Standoff, PC mount
  • 0.70” outer diameter
  • 3/4” tail diameter
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Socket - 9 Pin, Plastic, ¾" mounting hole, top mount
9-pin plastic tube socket commonly used for preamp tubes or EL84 power tubes
  • Top mount
  • 3/4” chassis hole required
  • 1-1/8” mounting centers

Please note: This socket will not work with tube retainer S-H144
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Socket - 9 pin miniature, ceramic, bottom or top mount
Ceramic tube socket commonly used for preamp tubes or EL84 power tubes.
  • Chassis hole: 7/8”
  • Mounting Centers: 1-1/8”
  • Bottom or top mount
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Socket - Belton, 9 Pin, Miniature, Top Mount
9 pin miniature Belton socket. Applicable for use with all types of electric and electronic equipment using vacuum tubes.
  • Paddle saddle mounting
  • Phosphorous bronze pin terminal with tin plating
  • Glassfiber filled PPS Insulating material
  • Easy mount with collar attached socket
  • 1-⅛" mounting centers
  • Fits ¾" chassis hole
  • Top mount
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