It would be a simple matter to pull those vactrols and test them.Here's the 292t with 8 unmarked, hand-soldered vactrols.
I actually looked around for a while and tried to find documented testing specs being referred to here.
Using a vactrol tester to apply the 4 test currents to the vactrol to get 4 stage readings is also a simple matter. The first image shows a vactrol that has near perfect specs according to the Buchla vactrol selection criteria, the second image shows a vactrol that is way over spec. The vactrol in the second image would produce the response complained of here.
Statistics: Posted by LaBelleAurore — Thu Dec 19, 2024 2:25 pm