Solid State Rectifier - Yellow Jacket® YJR, For 5AR4, 5U4, 5Y3

Solid State Rectifier - Yellow Jacket® YJR, For 5AR4, 5U4, 5Y3

Yellow Jacket
Solid State Rectifier - Yellow Jacket® YJR, For 5AR4, 5U4, 5Y3 image 1
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The YJR is a direct plug-in replacement adapter for use in most amplifiers that use 5AR4/GZ34, 5U4, 5Y3 or similar full-wave rectifier tubes. The YJR converts your amp's vacuum tube rectifier to a solid state rectifier, reducing tube sag for a tighter sound and feel. The tube rectifier can easily be swapped back in when sag is desired. This Yellow Jacket® is a solid state device and as such does not require vacuum tubes.

  • Converts most audio amplifiers which use a vacuum tube rectifier 5AR4/GZ34, 5U4 or 5Y3 to a solid state device.
  • Safe for all common amplifiers and transformers.

All Yellow Jacket® converters have a one year warranty against manufacturer defects.

Item ID:
Yellow Jacket
Product Measurements by Type
Item Diameter1.301 in.
Item Height0.82 in.
Packaging Information
Packaging Dimensions4.75 in. × 3.5 in. × 1.315 in.
Weight (Packaging)0.266 lbs.

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Specifications, Files, and Documents

PDF: YJR Instruction Sheet YJR Instruction Sheet3.27 MB

Questions and Answers

Click each question to see its answers.
Asked by Anonymous on October 14th, 2016.
Matt H.
October 14th, 2016
Staff Member
Using a solid state rectifier will stiffen up your power supply a bit and reduce sag.
Asked by Anonymous on October 21st, 2016.
Matt H.
October 21st, 2016
Staff Member
As long as you are replacing a 5AR4/GZ34, 5U4 or 5Y3 rectifier tube then this will work. It may have more pins that your tube but the extra pins are not connected to anything.
Asked by Anonymous on November 26th, 2017.
Matt H.
November 28th, 2017
Staff Member
These are the same thing but made but two different manufacturers.
Asked by Anonymous on January 7th, 2018.
January 10th, 2018
Staff Member
Unfortunately, this is not an acceptable replacement for a 84 tube.
Asked by Anonymous on October 27th, 2019.
October 29th, 2019
Staff Member
No, it does not.
Asked by Anonymous on November 7th, 2019.
November 8th, 2019
Staff Member
This is a solid state replacement for a tube rectifier and can be used in amps with a standby switch
Asked by Anonymous on July 31st, 2020.
July 31st, 2020
Staff Member
A standby switch can be useful but it is not required.
Asked by Anonymous on June 24th, 2021.
June 25th, 2021
Staff Member
This is not recommended for amplifiers without a standby switch. The rectifier tube or any replacements will not have any bearing on the bias settings.
Asked by Anonymous on March 8th, 2023.
March 9th, 2023
Staff Member
If you are switching from a tube rectifier to a solid state rectifier, the plate voltage will increase some.
Asked by Anonymous on March 14th, 2023.
March 14th, 2023
Staff Member
If they are standard diodes, it would simply put them in series with the solid state rectifier diodes and shouldn't cause any issues.

Product Reviews

5.00 out of 5 based on 6 reviews
jokatalya - March 16th, 2023
5 out of 5

My 5E3 clone had the famous flubby, farty bottom end. The Yellow Jacket SS rectifier did wonders to tighten up the low end and made it play at higher volumes without extraneous low end junk noise. My favorite amp is way more useful and versatile now. Own a tube rectified amps with a standby switch? Pop for the $22 (shipped) and give it a try.

JOSEPH MOLANDA - April 16th, 2020
5 out of 5

Great solid state replacement rectifier! Have to put in a time delay relay to let power tubes warm up before high voltage is applied.

Yuzo Yamada - April 9th, 2018
5 out of 5

This is perfect for my new 45 amplifier to replace "5U4", that was making lousy/annoying hum noise. I love this YJR!

Beat regards,

CHRISTOPHER BUTLER - April 23rd, 2016
5 out of 5

All good/no issues/works as advertised. love your company.

kevintaft - March 13th, 2016
5 out of 5

This is a perfect Silicon replacement for my HH Scott Tube Amp GZ34/5AR4 Rectifier.

Rick Shaw - April 19th, 2015
5 out of 5

These are great for a little more high voltage.....