I have a Triplett 3423 tube tester which I have purchased years ago.
The unit was sold to me as recently calibrated and worked without problems for a number of years.
Readings could be compared to other testers of mine, a Sencore 162 as well as a Hickok 600 and a Precise 111, and they made sense most of the time and let me believe the unit was working correctly.
Recently I checked on EF84 pentodes and during warming up I realized that the needle of the meter did no longer reach the line zero position which it would normally reach immediately after switching it on.
Changing the L117 L/M 7GT tube did not help.
I guess one of the elderly parts of this tester like a cap or else has finally given up.
Unfortunately I am not a handy man myself, so I am looking for someone who could check and repair this unit, preferably in the Netherlands, Belgium or Germany.
The Triplett 3423 is otherwise in a good condition and worth repairing, even if it costs a three digit amount of EUR.
Sending it back to the US to someone like Roger Kennedy to look after it is an option of course but very costly, shipment and customs fees alone are probably more than a repair in NL/B or D...
I have the full documentation on this tester available, including the calibration instructions.
The picture gives an idea about how the tester worked in the past.
Thanks for advance for help in this matter.
Best regards
Dieter