▼ Menu

1Q5GT

Sensibly equivalent to:
CV1826
    
Extras ▼

 

The 1Q5GT is a battery audio output valve capable of providing around one quarter of a Watt of output. It was designed for use with a single dry call as filament supply and 90 Volts HT.
The valve is branded Philips and Made in USA. The lozenge on the glass looks very much like an RCA product. This was clearly made during WWII.
The side view of the box anode.
The anode face view.
The filament is a pair of oxide coated strands. The grids can be seen through the top mica sheet.
The filament tension springs.
The wide glass tube envelope is 29 mm in diameter, and excluding the IO base pins is 60 mm tall.
Reference: Datasheet. Type 1Q5GT was first introduced in 1940.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
-
f+
a
g2
g1
-
f-
-

 

Absolute Maximum Operating Conditions
Beam Tetrode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
1.4
0.1
90
90
-4.5
9.5
1.3
75,000
2.2
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated September 26, 2018.
shape:wide.glass.tube construction:pinch type:beam.tetrode age:1940.1950 base:io heater:1.4v pins:8 pin:1.- pin:2.f+ pin:3.a pin:4.g2 pin:5.g1 pin:6.- pin:7.f- pin:8.-
Return to Main Index