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 kind of nice.
Now, I wonder where that oven went, I'd love to get it running. :)
You always learn something. :)
Cheers,
Magnus
On 09/07/2017 05:30 PM, Bob kb8tq wrote:
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 number. That’s probably a good
guess for the
set tolerance on the unit. Anything from there up to 1x10^-7 isn’t a bad guess
for temperature
stability. Again, it’s all guesswork.
Bob
On Sep 6, 2017, at 10:26 PM, Glenn Little WB4UIV <glennmaill...@bellsouth.net>
wrote:
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 100.000000 KHz.
The oscillator voltage is 30 V DC and the oven voltage is 115 VAC.
It has an octal plug on the bottom with the pins marked:
1 - oven indicator
2 - A.F.C.
3 - heater power
4 - +30 VDC
5 - case ground
6 - ground
7 - heater return
8 - 100 KC output.
With the nameplate listing the frequency in KHz and the case listing the
frequency in Kc and the older NSN, it appears that this oscillator was made for
a longer period of time.
The top has two adjustments, both with a screw cover.
One is freq adj and the other is output adj.
Does anyone have any data on this oscillator?
What would I expect the accuracy to be?
The printed frequency implies, to me, that the accuracy is in the realm of
0.001 Hertz at 100 KHz.
Did I miss something here?
The top also shows this to be a "Generator Reference Signal".
Any insite appreciated.
73
Glenn
WB4UIV
--
-----------------------------------------------------------------------
Glenn Little ARRL Technical Specialist QCWA LM 28417
Amateur Callsign: WB4UIV wb4...@arrl.net AMSAT LM 2178
QTH: Goose Creek, SC USA (EM92xx) USSVI LM NRA LM SBE ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"
---------------------------------------------------------------------------
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
