What is the AZ1 vacuum tube?

The AZ1 is a rectifier vacuum tube designed for rectifier applications. Classic European rectifier. Gentle delivery..

What is a AZ1 substitute or equivalent?

Direct equivalents to the AZ1 include RGN1064. These share the same pinout and operating envelope, so they can usually be swapped without circuit changes — though batch-to-batch variations between manufacturers (NOS vs current production) may shift the sonic character noticeably.

Is the AZ1 still in production?

Production status varies by year and manufacturer. The current Amperatubes catalog classifies the AZ1 as Moderate availability. NOS (new-old-stock) examples from RCA, Mullard, Tung-Sol, GE, Sylvania and Telefunken trade among collectors; modern production where it exists comes mostly from JJ Electronic, Electro-Harmonix, Tung-Sol (New Sensor), Genalex, and a handful of small-batch makers.

What does the AZ1 sound like?

Classic European rectifier. Gentle delivery.. Sonic character also depends heavily on the circuit operating point, the surrounding tubes in the stage, and the output transformer when present — use the interactive loadline calculator on this page to explore the trade-offs.

AZ1 Rectifier Vacuum Tube

Also known as RGN1064

Full-wave rectifier for vacuum tube power supply designs

RectifierHeater 4 V · 1.1 ASide Contact P8APhilips·Telefunken 1935

Max DC output current: 100mA
Max RMS input per anode: 500V

AZ1

Characteristics

Datasheet values, once each. Every value cites its sheet.

HeaterDirectly heated

Specifications of AZ1 — Heater
Heater voltageVh	4 V
Heater currentIh	1.1 A

Rectifier limitsDatasheet maximum ratings — not to be exceeded

Specifications of AZ1 — Rectifier limits
Max RMS input voltage per anode	500 V
Io max (DC output current)	100 mA
Max reservoir capacitor	60 µF
Min series resistance per anode	100 Ω

Mechanical

Specifications of AZ1 — Mechanical
Base	Side Contact P8A
Rarity	Moderate
Pinout

datasheet cited · model or editorial reading · catalogue value, no citation attached yet · nothing invented

Using this tube

Interactive loadline calculator not available for this tube yet — it needs calibrated Koren or Ayumi parameters.

Applications

Power supply rectification

Generic rectifier rectifier stage

Replace or compare

Sources

By Jean-Michel Falligan DevergneReviewed May 29, 2026Source : Philips AZ1 datasheet

Manufacturer datasheets

8 manufacturer datasheets cross-checked for AZ18 verified

AZ1 DatasheetLocal mirror · PDF

SPICE models

Revision and verification status

Source: Philips AZ1 datasheet
Reviewed: 2026-05-29
Status: DataModelCalc
Model: under review

Context

The AZ1 is a directly-heated rectifier from Philips·Telefunken, introduced around 1935. Commonly used in rectifier applications. Classic European rectifier. Gentle delivery.

History

Introduced: 1935
Manufacturer: Philips·Telefunken
Era: Pre-War

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