Designed with Luftwaffe code Ln25520 was manufactured, since 1940 until the end of the war, by Dietz und Ritter : Leipziger Funkgerätebau G.m.b.H. also known as “Körting”.
This tube tester can be programmed to measure the most common German military valves, by means of special cards showed in the following pictures. This is the only German military valve tester, which provides the value of the parameter S (gm), given in mA/V, straight away.
The Tube tester is equipped with the followings valves 2X RGN1064; RGN1064 ; STV280/40 STV280/80; H85-255/60; H85-255/60.
Types of valves that can be tested : RE074; RE084; RES094; RE134; RE144; REN904 (spez. F); RENS 1264; RENS 1284; RENS 1294; RV12P2000; NF2; RV12P4000; RV2P800; RGN1064; RS241; RS242/RS242 spez.; RL2P3; RES664; RES1664d; RES164; AC2; RL2T2; RL12T2
