[time-nuts] End of Range Oscilloquartz 8600-3

[Ed Palmer]

It sounds like yours is different from my 8601.  How old is yours? From 
the label inside it looks like mine is from 1983.

Internal pictures are here:

http://s701.photobucket.com/user/edpalmer42/library/Oscilloquartz%208601%20Oscillator

If you click on 'view as story' you'll see some comments that I added to 
the pictures.

Ed

On 2017-12-12 11:00 AM, <ulf_r_k at yahoo.com>  wrote:
> Emailed Oscilloquartz that now has another name: Advaoptical... This in my capacity as aresearch engineer at Onsala Space Observatory.And the oscillator is at my work bench. Nothingprivate/hobby about this.
> The answer was that since we do not have a service agreement,they would not disclose any information.
> (Compare this with Keysight who has a free downlad area for oldmanuals. IMO the Keysight approach benifits their businessin the long term).
> So...
> I went along and started to dissassemble the 8600-3.
> The outer case was easy. Inside is a PCB with RF buffersand temperature regulation circuitry.
> Then there is a thermo bottle with the ovenized oscillator.This unit is connected to the PCB using two flex cables.
> The oscillator unit can simply be extracted from thebottle using an Metric 3 mm screw lightly screwed inone of the holes in the oscillator assembly.
> The assembly can be accessed by carfully unscrewingthe flex-cable end from the other mechanics. No needto touch the three small screws at the lid.
> Now it is starting to get intersting. I have not foundthe RF wiring into the crystal. The PCB in this unitseems to deal only with temperature regulation.Possibly, the RF is routed together with some heaterwinding.
> Or the crystal and the oscillator parts is sealedin such a way that there will be no wayto dissassemble it. There are several thermistorsglued inside to various parts of the oscillator/ovenassembly. That will make any further attemptsdifficult as the connecting wires are thin and delicateif they needs to be unsoldered.
> The construction is a nice piece of engineering.I'll give them that.
> Right now, I cannot see any typical oscillatorcircuitry (pF, nH, RF transistors) etc.
> I think I'll contemplate on the next movefor a day or so...
>
> Ulf Kylenfall
>
>