Hi
The real fun was building those ovens, at least for the “precision” versions:
The thermostatic switches came in with a fairly loose tolerance on them. First
step was to play with a bunch of water baths to sort them out. If you wanted
something like a 0.5 C tolerance that would take a *long*
Hi,
I saw something very similar, and it had a bi-metal regulator.
Simple and effective for its time, but not very good if you care about
better performance, as bang-bang regulation of slow rate isn't as good
as the same crystal could do with a more linear regulation. Never the
less, it's
Hi
The 115VAC power suggests that it dates back a ways. The 100KC frequency
suggests
the same thing. It could easily be a 100 KHz crystal in a simple thermostat
controlled oven.
In that case, the stability would not be anything super duper.
Your guess of 0.001 Hz gives a 1x10^-8 sort of
I have a Bulova crystal oscillator, part number 1505869-1K, model number
AMO31HP-V-1, NSN 6N5840-797-7659.
The NSN tells me it is a little old and that it was a turn-in, probably
repairable at some higher level.
The frequency is marked 100.00 KHz.
The oscillator voltage is 30 V DC and the
