32B Datasheet. http://elektronenroehren.de/avvt

AlesaVaicVacuumTechnology

AV 32B SL Datasheet

This tube is an AV300B SL with extra cooling plates. It will operate like a normal 300B, in any amplifier. The only difference is, this tube allows maximum 65Watt plate dissipation.

Features

This tube uses AVVT's unique Super-Linear Patent (Note1)
AVVT's patented ribbon filaments with 16 flat Surfaces, for more linearity
Two extra large getters
Unbreakable Hard-Glass. Bulb is larger sized than normal 300B.
Anti-microphonic Suspension in Tube Top
All 1999 (and later) AVVT tubes use unbreakable hard-metal filaments. (Note2)
Ceramic UX4 Socket with Gold Plated pins

AV 32B SL
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AV 32B SL Filament Ratings
Filament Voltage	5 Volt
Filament Current	1.3 Ampere

AV 32B SL Maximum Conditions (See also Note 3)
Plate Voltage	550Volt
Plate Current	180mA
Plate Dissipation	65Watt
Power Output in Class A	21Watt

AV 32B SL Typical Data (See also Note 4)
Plate Voltage	400V
Plate Dissipation	38Watt
Plate Current	95mA
Grid Voltage	-71Volt
Plate Impedance	690 Ohm
Amplification Factor	4.2
Transconductance	6 mA/V
Load Impedance	1500 - 3500Ohm
Grid resistor	50k Ohm
Operating Lifetime	40.000 hours

AV 32B SL Mechanical Data
Size	170 x 65mm (Includes Socket)
Weight Standard Version	190 Grams

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Note 1) Super Linear platesare based on an exclusive AVVT patent. The cold ends of the filaments do not have a very good function, and cause distortion. This tube has four cavities inside the plate, that cover the cold ends of the filaments. These cavities are covered by four nickel plates, that you can see from the outside. Within these cavities, plate current will not be able to flow, and this disables the emission of the cold end of the filaments.
Note 2) Hard-metal filaments are operated at much higher temperature than normal tubes. This tube will glow bright orange, instead of the dark orange color of nickel filament tubes.
Note 3 Individual Test data, such as: Matching Data, Grid Current, Vacuum, Filament Current, etc, are on the Certificate that comes with each individual Tube. Each tube has is numbered, inside the bulb with a metal Tag
Note 4 Typical Data are choosen higher as for the 300B. When operated at lower power level, refer to typical data of the 300B for mu, transconductance, and Plate Resistance. You can test this tube with normal 300B settings.