GZ34-STR TAD REDBASE PREMIUM SELECTED

Preview: RT501 GZ34/5AR4-STR TAD PREMIUM SELECTED

RT501-MASTER GZ34-STR TAD REDBASE PREMIUM SELECTED

RT501 GZ34/5AR4-STR TAD PREMIUM SELECTED

From €36.50 *

*Prices incl. VAT plus shipping costs

In Stock, delivery time approx.1-4 working days (Within Germany)
The delivery times for shipping abroad can be found here.

Part Number: RT501
Packaging Size: 5x5x12 cm
Packaging Weight: 0.1 kg
UPC: 4251594900863

The Pure and Typical Sag! A faithfull reproduction of the Mullard/VALVO GZ34 with the... more

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Product information "GZ34-STR TAD REDBASE PREMIUM SELECTED"

The Pure and Typical Sag!

A faithfull reproduction of the Mullard/VALVO GZ34 with the perfection of our REDBASE™ series

Pure power and the typical sag have been the distinguishing characteristics of the most popular guitar amps of guitar heroes since the 1960s.

equivalent to 5AR4, can replace 5U4GB and 5U4G.

Tube Type:	GZ34/5AR4
Selection:	Premium

Documents...

Available downloads:

Download TAD-Datenblatt_RT501 REDBASE-1.1

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Customer evaluation for "GZ34-STR TAD REDBASE PREMIUM SELECTED"

From: Jon On: 24 Mar 2023

Works Great

I have used this tube for everday use for about a year. I use my amplifier for both TV and music, so its got many hours. It works great!

From: Daniel On: 20 Jan 2023

Thanks to SAV

The TAD service worked perfectly!
Indeed, it is always possible to come across a defective tube, especially with modern rectifier valves where the know-how of yesteryear has not yet been fully recovered. In my experience, of course.
Let's hope that future GZ34 productions will be more and more perfect ;+)

From: Daniel On: 13 Jan 2023

Good and bad

Très bon de par sa durée de temporisation (20 secondes), bon pour sa tonalité générale mais mauvais sur mon ampli Hi-Fi à cause de sa tendance à se mettre en court-circuit !! En d'autres termes, tube fragile ; où suis-je tombé sur un mauvais exemple malgré la sélection rigoureuse censée être faite ici ?
Une redresseuse NOS a depuis résolu les problèmes de crépitements… A bon entendeur.

From: Admin On: 13 Jan 2023

Hi Daniel,

sorry to hear about the failure. This may happen with tubes but this is within your warranty period.

Please contact our customer service for replacement: info@tubeampdoctor.com

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Here you will find the most important information about the matching of our tubes more

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Information about TAD Matching

Here you will find the most important information about the matching of our tubes

When does a tube become a Premium Selected tube?

Power tubes

All power 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

Premium RT-Matching of Power Tubes

Our Premium Matching is an exact matching of power tubes with identical Plate Current (PC) and Transconductance (TC).

TAD Premium Selected tubes are guaranteed for a period of 6 months (according to terms of warranties)

for the quality criteria mentioned above.

Preamp tubes

All preamp tubes labeled Premium Selected have passed the following tests:

- Low Noise Test

- Microphonic Test

- Gain Test

- Sonic Tests

- Shock Tests

- Listening Tests

- Balanced Output Test

Premium Selected

We call the tubes SELECTED which have passed above tests and thus qualify as reliable all-round tubes of their type.Typically this is around 30-60% from a batch that receives the SELECTED label from TAD.

For applications in particularly sensitive functions such as V1 or input stage with combo amps, V1 in high-gain amps, tube microphones and phono preamps, we recommend using the respective HIGHGRADE selection

HIGHGRADE SELECTION

But only those tubes which pass these tests best are labeled Highgrades.Typically this is approx. 3-10% from a production batch that qualifies for the HIGHGRADE rating from TAD.

Due to the very high selection requirements, this article is temporarily only available to a limited extent! Please note our shop-information on availability.

Matching and Selecting Options for Preamp Tubes

Matching in Pairs for preamp tubes means that two tubes show identical gain, hence, four characteristically identical systems.

This matching method includes our Balance-Selection. We highly recommend this matching method for hi-fi systems.

TAD Premium Selected/Highgrade tubes are guaranteed for a period of 6 months (according to terms of warranties)

for the quality criteria mentioned above.