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4300A

Sensibly equivalent to:
300A 300B 3B/170A 3B/400A 4275A CV1452
See also:
Standard Valves
    
Extras ▼

 

The 4300A is an audio power triode from STC. The design is from the Americam parent company and the American Type designation is 300A.
The side flanges on the anode are present to assist with thermal management.
Looking along the grid axis.
The top mica with filament strands and tension springs.
Looking down on the top mica showing the support rods with the filament tension springs attached.
The pinch and lower mica. The stitching of the anode halves can be seen as can the base of the filaments. The control grid is just visible on the right.
The classic envelope is 60 mm in diameter and, excluding the UX4 base pins, is 136 mm tall.
Reference: Datasheet. Type 4300A was first introduced in 1938.

 

Pin Connections
UX4
1
2
3
4
f
a
g1
f

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
5.0
1.2
450
-100
100
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated July 21, 2019.
shape:classic construction:pinch type:triode age:1930.1940 base:ux4 heater:5.0v pins:4 pin:1.f pin:2.a pin:3.g1 pin:4.f
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