TO18 size of can but inerference fit? mounted in a brass mount with
lens, no type number seen.
Actively passing 60mA drops 1.3V and DVM-D test shows 1V one way, so
diode function , but no IR out as tested with IR zapper tester of IR
photodiode in series with optical LED , indicates on or flashing of any
working zappers ever tried with it.
So are they known to fail optically, perhaps overdriven, but not go o/c
or low ohms , still functioning as a diode though. ?
Kit specs say 910nm and no tab seen , but TO-18 can type , although
that could be machined off to clear the brass barrel , any machining not
seen as axial view only, due to the surrounding brass barrel. So
something like
SFH400 to 2, FPE500 to 530, OP223,224,231,232,233, or TIL23 to 25 but
none of those are specified as exactly 910nm , ranging 880 to 950nm.
Initially I will try heating the assembly to 120 deg C and blast of
freezer spray to TO18 package , to try breaking presumed assembly-heated
interference fit ,
to split apart. Other than finally drilling out or seriously heating if
laquer fit, any ideas to break apart without destroying any marking.
Hand scratched on the brass is number 3738 presumably relating to a test
of the lens combination or perhaps coding of date in 1978 , as 1979 kit.