Have you been to a drug store in the last 30 years?Just take 'em to the drug store and forget about it
Someone who works with tubes all the time, possibly repairing tube type amplifiers should just build their own test jigs.
No need - you don't test 'components' you test 'circuits' - so there's no need or point in testing a valve outside of the circuit it's used in.
Back in the old days (when valves were still used) we had a valve tester at work (it got destroyed in a fire a bit later on), but it was NEVER used for doing repairs in the workshop, it's sole use was testing valves for customers who brought them in (presumably like American drug stores used to?).
We've fairly recently acquired a similar Mullard Valve tester to the one we used to have from a bankrupt dealer we cleared out, I'm not sure if we've binned it or not?, as there was zero interest in it.
No need - you don't test 'components' you test 'circuits' - so there's no need or point in testing a valve outside of the circuit it's used in.
So the LIFE TEST, is testing the Cathode? cathode's chemicals?
Analog Tube tester
1.) Test The Grid Emissions
2.) Test the Grid Leakage
Grid leakage is also a term that is frequently incorrectly used to describe the condition of a tube when tested on a tube tester. The correct term is inter-electrode leakage, which refers to leakage paths between the elements of a tube. Many emission type tube testers have leakage tests that far exceed the application of the tube being tested and will reject many perfectly functional tubes. Sencore sold tube testers in the 1960s that were claimed to have the "most sensitive leakage test in the industry".
Yea but what if you had internal shorts inside a preamp tube or power amp tube or a tube rectifier and you were to turn the amp on , it wouldn't work and then the preamp section board at certain stages wouldn't work , so you have to use an oscilloscope to track it down
Plus if the tube rectifier is has shorts or other problems it will cause the amp to blow fuses
A Tube Tester HELPS you out with this stuff to Cut down the troubleshooting
.the 5Y3 and 5U4 tubes. Both have the same pin out with the 5U4 rated for higher current. I have two plates and a single filament. I can yank the tube measure filament resistance and continuity test either filament pin to the plate pins in a min using a VOM
testing the filter cap with a VOM
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