TAD Rectifier Tubes SELECTED

 

 
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Tube Amp Doctor GmbH
RT502-MASTER 5U4G-SV TAD PREMIUM SELECTED
5U4G-SV TAD PREMIUM SELECTED
Tested and selected from the NOS Svetlana factory in St. Petersburg. Classic design with large glass bulbs, perfect for use in high-end audio equipment, harmonious, mild reproduction with stringent bass. Substitute for the 5Z3P / 5Z3PAT...

From €42.80 *
Remember Part Number: RT502
Tube Amp Doctor GmbH
RT504-MASTER 5U4GB TAD PREMIUM SELECTED mit geradem Glaskolben
5U4GB TAD PREMIUM SELECTED straight bottle
The Straight One! The 5U4GB has a straight glass envelope. This type has been widely used in U.S-made guitar amps from the 1950s to the 70s. The 5U4GB has a slow start feature, which protects output tubes from high voltage peaks when you...

From €36.50 *
Remember Part Number: RT504
Tube Amp Doctor GmbH
RT503-MASTER 5Y3GT / 6087 TAD PREMIUM SELECTED Rectifier Tube
5Y3GT / 6087 TAD PREMIUM SELECTED Rectifier Tube
The rectifier tube for smaller vintage amps like the 5F1 Fender Tweed Champ or the Tweed Deluxe 5E3 if more headroom is required. Higher output voltage than the 5Y3WGTB (RT513). Not suitable for the Mesa Boogie Lonestar Special due to...

From €28.90 *
Remember Part Number: RT503
Tube Amp Doctor GmbH
RT513-MASTER 5Y3WGTB TAD BLACKPLATE Selected
5Y3WGTB TAD BLACKPLATE Selected
5Y3WGTB TAD BLACKPLATE™ Selected THE rectifier tube for smaller vintage amps like the 5F1 Fender Tweed Champ, the Fender 57 Custom Champ or the Tweed Deluxe 5E3. Does replace any 5Y3GT. Has that typical "sag" like NOS 5Y3 by its voltage...

From €43.80 *
Remember Part Number: RT513
Tube Amp Doctor GmbH
RT506-MASTER EZ81/6CA4 TAD PREMIUM SELECTED Rectifier Tube
EZ81/6CA4 TAD PREMIUM SELECTED Rectifier Tube
The Small Rectifier! The TAD EZ81 / 6CA4 is a small rectifier tube for 6.3V filaments. It is used in smaller amps, such as the Marshall 1974X or the TAD 18W Plexi Kit, Silverstone amps and in various Hammond organ amplifiers. It is a...

From €28.80 *
Remember Part Number: RT506
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Tube Amp Doctor GmbH
RT501-MASTER GZ34-STR TAD REDBASE PREMIUM SELECTED
GZ34-STR TAD REDBASE PREMIUM SELECTED
The Pure and Typical Sag! A faithfull reproduction of the Mullard/VALVO GZ34 (aka 5AR4) combined with the perfection known to our REDBASE™ series. Pure power and the typical sag have been the distinguishing characteristics of the most...

From €36.50 *
Remember Part Number: RT501
Tube Amp Doctor GmbH
RT521-MASTER GZ34/5AR4-JJ TAD PREMIUM SELECTED
GZ34/5AR4-JJ TAD PREMIUM SELECTED
GZ34/5AR4-JJ TAD PREMIUM SELECTED

From €36.95 *
Remember Part Number: RT521
Tube Amp Doctor GmbH
RT512-MASTER TAD 5U4G REDBASE PREMIUM SELECTED
TAD 5U4G REDBASE PREMIUM SELECTED
The Big Bulb Big bulb vintage rectifier tube, used in high-end audio amplifiers but also in modern recto-type amps, such as the Mesa Boogie Double/Triple Recitifer and many classic Fender Silverface amps. It can replace the 5U4GB. Its...

From €42.80 *
Remember Part Number: RT512
Tube Amp Doctor GmbH
RT515 TAD Solid State Rectifier
TAD Solid State Rectifier
TAD Solid State Rectifier Solid State Rectifier, replaces 5U4G/GB, GZ34, 5AR4 and 5Y3 Tube Rectifiers. Perfect for getting more headroom and stability out of the amp! It is advisable to adjust the quiescent current of the power tubes....

€16.80 *
Remember Part Number: RT515

Why Choose TAD Rectifiers SELECTED?

Discover TAD Rectifiers SELECTED – premium-grade rectifier tubes for guitar and bass amplifiers. Each tube is carefully tested and selected to ensure maximum reliability, tonal integrity, and inspiring performance.

Premium Selection with Quality Assurance

Every TAD rectifier tube undergoes rigorous testing at Tube Amp Doctor, including measurements of idle current, transconductance, noise, microphonics, as well as full-load and shock tests.

12-Month Warranty
Each SELECTED rectifier tube comes with a 12-month warranty on function and tone — offering you peace of mind for any upgrade or repair.

Tradition Meets Innovation
Whether it’s a 5U4G, GZ34/5AR4, 5Y3GT, or EZ81 – these tubes combine classic vintage designs with modern reliability, making them perfect for authentic tone in both vintage and custom-built amps.

Product Highlights

ModelTone & Application
5U4G-SV – Classic ST Glass Warmer response than solid-state diodes; great for classic Mesa Boogie amp tone.
5U4GB – Straight Glass Authentic 1950s/60s style; shorter height (max. 120 mm) for compact amp builds.
5Y3GT / 6087 Higher headroom; ideal for Tweed Champ or Tweed Deluxe amps.
5Y3WGTB – Blackplate Selected Delivers legendary "sag" effect – dynamic response for vintage-style compression.
EZ81 / 6CA4 Excellent choice for compact British-style amps like the Marshall 1974X or TAD Plexi Kit.
GZ34-STR REDBASE (5AR4 Repro) Mullard/VALVO-inspired tone with strong sag – a true '60s sound classic.
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