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

Yellow Jacket
Solid State Rectifier - Yellow Jacket® YJR, For 5AR4, 5U4, 5Y3 image 1
Click to zoom in
Customer Images:
No Images yet! Submit a product image below!

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

In Stock

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
Item Diameter1.301 in.
Item Height0.82 in.
Packaging Information
Packaging Dimensions4.75 in. × 3.5 in. × 1.315 in.
Weight (Packaging)0.0882 lbs.

My Project Lists

You must be logged in to add items to a project list.

Specifications, Files, and Documents

PDF: YJR Instruction Sheet YJR Instruction Sheet3.27 MB
Questions? Contact us at [email protected], or give us a call at 480-296-0890

Product Reviews

5.00 out of 5 based on 4 reviews
Randy K - April 12th, 2021
5 out of 5

A very nice alternative to the stock rectifier tube in my silver face Princeton Reverb.

The Yellow Jacket isn't necessarily better in *all* situations -- at lower gain it doesn't really improve my tone or the response of my amp. Where it shines, though.. is when I crank up the amp -- it smooths the rough edges of a hard pick attack and transitions into a nice sustain. At higher amp gain, the Yellowjacket makes my Princeton sound a bit more refined as well as easier to record.

For gigging this is probably a no brainer and I wouldn't think twice about using it. Solid state adds an element reliability and I imagine the smoother high gain attack probably makes things a bit easier on the sound guy/girl.

kb - February 5th, 2021
5 out of 5

Great for tightening up the bottom end of a Tweed.

Les Leoniak - January 29th, 2021
5 out of 5

Works great. Easy drop in replacement. Installed it in my 59 Bassman Ltd. Greatly improves the attack of the amp. I wasn’t big on the tube sag. Increases the amp output as well. I feel it made the amp more responsive and I installed this as part of a full re-tube and re-bias. Increases the plate voltage by about 10 volts. Seems like a well made unit.

Dave Swinford - September 13th, 2020
5 out of 5

I put this in my 50 year old Harmony 410A amplifier. I wasn't 100% sure how well it would work but it works PERFECTLY. Now my first amplifier from childhood that ended back in my hands after many many years is functioning perfectly.