▼ Menu

705A

Sensibly equivalent to:
2J/40E 2T/450E A232 CV3587 CV8238 TH705A
    
Extras ▼

 

The 705A is an EHT power rectifier with a PIV rating of 35,000 Volts. The average rectified current is 100 mA with a peak of 500 mA. The construction is all glass with the lead-out wires being fixed to the main pins that are held in a ceramic disc outside the envelope. The special base clamps to this ceramic disc.
The filament is thoriated tungsten and when powered glows a bright orange.
See 705A from Western Electric for more details. This exhibit shows a different style of lettering.
The wide glass tube envelope is 58 mm in diameter, and excluding the B4A base pins is 117 mm tall.
References: Datasheet & 1040. Type 705A was first introduced in 1943.

 

Pin Connections
B4A
1
2
3
4
tc
f
fct
f
-
a

 

Absolute Maximum Operating Conditions
Rectifier
Vh
Ah
Va
mAa
5.0
5.0
12.000
500
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated November 27, 2013.
Return to Main Index