Vacuum Tube - 5AR4 STR, Tube Amp Doctor

Tube Amp Doctor (TAD)
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Vacuum Tube - 5AR4 STR, Tube Amp Doctor

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Tube Amp Doctor 5AR4 Rectifier, Premium Selected

A faithfull reproduction of the Mullard/VALVO GZ34.
Pure power and the typical sag have been the distinguishing characteristics of the most popular guitar amps of guitar heroes since the 1960s.

Upgrade for 5U4GB and 5U4G.

Q: When does a tube become a Premium Selected tube?
A: All tubes labeled Premium Selected have passed the following tests:
- Plate Current (PC) and Amplification (TC)
- Low Noise Test
- Microphonic Test
- Sonic Tests
- Shock Tests
- Listening Tests
- Shorts & Leakage Tests

Item ID:
Tube Amp Doctor Part Number:
Tube Amp Doctor (TAD)
RoHS Compliant
Product Measurements by Type
No measurements are currently available for this product. Please contact us if you have any questions.
Packaging Information
Packaging Dimensions2 in. × 2 in. × 4.6 in.
Weight (Packaging)0.13 lbs.

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Questions and Answers

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Asked by Anonymous on January 11th, 2017.
Matt H
January 11th, 2017
These are Chinese tubes hand-selected by Tube Amp Doctor in Germany.

Product Reviews

5.00 out of 5 based on 1 reviews
- July 26th, 2018
5 out of 5

Nice tube... Using it for My JTM45 Cloan
It lowered my voltage down to a nice 443 from 450
that I was getting from a JJ GZ34 Tube.. I like the lower voltage better...
So Far I like it , I would buy another one again !!

Substitute Products

The following items can be substituted for this product. While not necessarily exactly the same, they will function as replacement items in your project.