▼ Menu

1B59

Sensibly equivalent to:
22M1
    
Extras ▼

 

The 1B59 is described as a hollow cathode glow modulator. The hollow cathode concentrates the discharge into a small circle.
It is a small light source that can be modulated with audio between 15 and 15 kHz and the discharge intensity is sensibly linear with cathode current. The light spectrum is between 350 and 650 nm. The gas filling is a mixture of neon and argon.
Typically glow modulators were used in Fax machines, soundtrack recorders, halftone scanners etc. The Russian TMH-2 could be modulated at up to 100 kHz.
The centre of the dome has the output window.
The wide glass tube envelope is 28 mm in diameter and, excluding the IO base pins, is 75 mm tall.
Reference: Data-sheet. Type 1B59 was first introduced in 1946.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
-
-
k
-
-
-
a
-

 

Absolute Maximum Operating Conditions
General Notes
Va
mAa
140
35
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated June 19, 2020.
shape:wide.glass.tube type:cold.cathode age:1940.1950 base:io pins:2 pin:1.- pin:2.- pin:3.k pin:4.- pin:5.- pin:6.- pin:7.a pin:8.-
Return to Main Index