Can anybody out there help me identifying this stuff? What is it? Where is it coming out from? What is that big black cylinder? What is the strange component close to the variable cap in the second picture?
Thank you. Emanuele (iw1dhi).
one hint is the motor/generator - that kind of sets it up as probably military - at least I assume that is what the siemens black cylinder is - I can't read the text on the label
Looks like a dynamotor
(a dc motor driving a dc generator)
It has 100 kHz on the label and 50 C so I would think it is some form of oven crystal oscillator.
Tom
The canister looks like a crystal oven.
Paul P.
The canister looks like a crystal oven
Paul P.
The cylinder could be a xtal oven??? Ken
The big black thing is a temperature controlled oven for a crystal. Notably a 100.0 KHz crystal.
I suspect the square object adjacent to the variable capacitor is another cyrstal, although, not crystal controlled, and adjusted for frequency with the variable capacitor next to it.
Jeff
Yep. It says so on the label. The 20VDC operating voltage kinda suggests that this thing runs on 24VDC as in aircraft or military.
My guess(tm) it's a ferrite pot core inductor. The hole in the middle is for adjustments. Judging by the ratty lacing cord around the chopped off wire bundle and several uninsulated resistors, I would guess it's from the 1940's or 50's.
As for the entire contrivance, I would guess it's part of a frequency standard or piece of test equipment. Possibly a frequency reference.
The other Jeff.
Yes, I thought about a crystal OSC oven... but @100,0KHz! What kind of application could require a so precise, so stable but so low in frequency signal?
PS: clicking on the pictures you can enlarge them so that you can read the oven label...
Well, a frequency standard. Or they use harmonics to calibrate equipment at regular intervals.
Jeff
Thinking in terms of the 1950-60's, a comb generator (a signal every
100KHz from DC to light), reference clock for driving other pieces of test equipment, Loran C or navigation reference, some manner of synthesizer reference, NavSat reference, inertial navigation system reference clock, precision motor driver, really old tube type digital clock, etc.Yes, I thought about a crystal OSC oven... but @100,0KHz! What kind of application could require a so precise, so stable but so low in frequency signal?
PS: clicking on the pictures you can enlarge them so that you can read the oven label...
+++++++++++++++++++++++++++Loran?
Yes, I thought about a crystal OSC oven... but @100,0KHz! What kind of application could require a so precise, so stable but so low in frequency signal?
PS: clicking on the pictures you can enlarge them so that you can read the oven label...
***************************************************************** Most commonly, they were used as marker/calibration generators in military (and some commercial) HF receivers, to facilitate easy of reading frequency on the analog dials.SINS is another time based nav system that requires a relatively high accuracy clock. Even the SINS from the 50s were running against clocks in the several hundred kilocycles - which itself was slaved to the boat's master clock - which was a URQ series standard running at 1MC (URQ-9,10) or 5MC (URQ13/23). The early SINS could get away with sub-MC clocks because their integrators were analog (linear mode) vs. digital (approximated mode) - i.e. offset errors of the slower clock don't accumulate as they do in a an incremental (digital) integrator). Even with these early SINS computers / integrators - their clock were way above 100KC. I wouldn't want to navigate a tight spot with a SINS limited to that kind of (lack of) accuracy. I'll note that not only receivers - but signal generators often used a reference like the one in the picture to produce "beat notes" to allow zeroing the dial every
100KC (my HP 606B has a 1MC & 100KC generator that allows "zero beating" the dial every 100KC with a "check" at 1MC to make sure the adjustment is).just my .02 rg
Hi,
It might come from a Siemens E311 shortwave receiver, which employs a
100 kHz oscillator as reference for the local oscillator. Refer toChristian
Hi,
I was wrong. The E311b parts bear part number Rel4...
Christian
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