Click for homepage
L 1-3
Russian tube tester - this page is a stub

L1-3 (Russian: Л1-3) is an high-end test device for thermionic valves (vacuum tubes), developed in the early 1960s in the former Soviet Union (USSR). It is one of the most advanced tube testers on the market, as it has stabilised LT and HT power circuits, and measures transconductance.

The L1-3 was introduced in 1963 and was in production for several decades. In the 1980s, it was succeeded by the L3-3, of which the only difference is that the rectifier valves are replaced by modern semiconductor diodes. The device is otherwise identical, and so is the user manual.

The device is powered from the AC mains and is extremely useful for collectors of valve-based equipment from the former Soviet Union (USSR). It has 20 different valve sockets, including a special one for valves with bare wires, allowing virtually any type of Soviet valve to be tested.
  
L1-3 tube tester (USSR)

Configuration of the device works by means of punched cards and configuration pins. When testing a valve, the card with the valve's type number must be installed on the patch board at the top centre, after which configuration pins must be inserted in each of the puched holes. Surplus configuration pins can be placed in the dummy sockets at the upper edge of the front panel.

L1-3 tube tester (USSR)
Front view
Programming field
Tube socketes
More tube sockets
Interior (right side)
Interior (left side)
Program cards
A
×
A
1 / 8
L1-3 tube tester (USSR)
A
2 / 8
Front view
A
3 / 8
Programming field
A
4 / 8
Tube socketes
A
5 / 8
More tube sockets
A
6 / 8
Interior (right side)
A
7 / 8
Interior (left side)
A
8 / 8
Program cards

Settings
  • Anode voltage
  • G1 voltage
  • G2 Voltage
  • Filaments (AC or DC)
Measurements
  • Anode current
  • G1 current
  • G2 current
  • Transconductance
  • Various other parameters
References
  1. Helmut Weigl, L1-3 - das russische Röhrenmessagerät (Bj. 1963)
    Retrieved June 2019.

  2. Jogis Röhrenbude, Russisches Röhrenprüfgerät L1-3
    Retrieved June 2019.
Further information
Any links shown in red are currently unavailable. If you like the information on this website, why not make a donation?
Crypto Museum. Created: Monday 17 January 2022. Last changed: Monday, 17 January 2022 - 17:16 CET.
Click for homepage