Description

Tubes function both as counters and displays. Tube has 30 cathodes arranged around a central anode disc. Each cathode is connected to one of three external pins, forming ten electrode groups. Applying three sequentially phased pulses to these pins makes the glow discharge jump from one electrode to the next. An external phase-shift network is used to provide the sequencing, resulting in a counter that advances the glow by three electrodes for every single input pulse. Dekatron A-101 is bidirectional (is able to count clockwise and vice versa).

Technical characteristics:

Brand: Anode, Dyatkovo, Russia
Substitutes: -
Counting: direction bidirectional
Operation: double pulse
Sort: sel
Base: RSH30
Socket: PL30-2p
Counting steps: 10
Number of guides: 2
Gas filling: Neon
Tube diameter max., mm: 34
Tube height max., mm: 76
Max. counting speed, kHz: 1
Supply volt. min., V: 425
Supply volt. typ., V: 450
Maintaining voltage min., V: 130
Maintaining voltage max., V: 170
Anode/cath. current min., µA: 300
Anode/cath. current typ., µA: 400
Anode/cath. current max., µA: 450
Guide bias volt. min., V: 36
Guide bias typ pulse op., V: 40
Guide bias volt. max., V: 44
Guide signal voltage pulse, Vp: -150
Cathode resistor typical, kOm: 33
Output voltage, V: 20
Reset pulse voltage min., V: -150