▼ Menu

TZ20

Sensibly equivalent to:
CV3742
    
Extras ▼

 

The TZ20 is a power triode primarily designed for use as a zero bias class B modulator. The audio power that is possible from a pair of these 20 Watt anode dissipation triodes is up to 70 Watts.
The T20 is mainly for class C RF operation but can be used as a modulator when the grids are suitably biased. The advantage of the TZ20 is the ability to work with zero bias and this remove the need for a stable source of bias.
The rectangular anode seen from the side.
The high voltages employed make the use of ceramic insulators worthwhile.
The filament tension springs sit on the upper ceramic support.
The balloon envelope is 60 mm in diameter, and excluding the UX4 base pins is 143 mm tall.
References: Datasheet.

 

Pin Connections
UX4
1
2
3
4
tc
f
-
g1
f
a

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
mAa
μ
7.5
1.75
800
137
62
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated November 10, 2018.
shape:balloon construction:pinch type:triode age:1940.1950 base:ux4 pins:4 pin:1.f pin:2.- pin:3.g1 pin:4.f pin:tc.a
Return to Main Index