Here are photos and short descriptions of some of my testers.
1st photo: 211 VT-4C United Electronics, tested on Neuberger RPM 370 with socket adaptor (giant jumbo socket – octal)
Ua = 600V, Ug1 = -10V.
2nd photo: Testing EL34 Philips Miniwatt Xf4 for plate current …
3rd photo: Neuberger RPM 370, serial num 102, year of production 1950th. This tester is modified in just one thing, tube rectifiers are changed with silicone diodes, old capacitors are replaced by new ones and now it’s capable to supply 600V plate voltage for testing 211 tubes via socket adaptor.
Great tube tester made by Metrix (COMPAGNIE GENERALE DE METROLOGIE, ANNECY FRANCE) model U-61 B
Testing big lot of pre war ECC83 12AX7 by Elektronska Industrija Nis
This tester was designed for military during WWII. It’s exceptional quality built, for testing newer types, double triodes and some specific valves there is socket adapter kit MX-949/U. Mutual conductance test 0-15000 mMhos
Testing transconductance Philips EL34 on Hickok I-177B tube tester, military product from WWII, I use it like mutual transconductance meter for old type antique tubes.
Tesla BM 215 A
Jackson model No 637, dynamic output tube tester
ChinagliaDino Elettrocostruzioni Provavalvole560
ChinagliaDino Elettrocostruzioni; Belluno,Italia, Provavalvole560 tube tester, small, simple and light one. It’sclassic “emission tester” cheap and sometimes could be dangerous solution, because it can overstress the tube with too big current. Anyway it could be very useful for fast testing and random testing bigger quantites of same type, if you are not in mood to bring 30 kgs of Neuberger iron with you!