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

paul swed paulswedb at gmail.com
Tue Dec 12 09:25:12 EST 2017


Ulf
Consider taking pictures of the process. That would be a great document for
users that need help.
Someone will post them on there web page. I have done this for things I
have built and shared.
Then we can see what you are running into.
As you have seen you have a huge range of expertise.
Can't open or disassemble it, not with time-nuts around. We like the
challenge.
Hey bad is bad nothing to loose right? That opens the door to serious
hacking.
Regards
Paul
WB8TSL


On Tue, Dec 12, 2017 at 2:59 AM, Ulf Kylenfall via time-nuts <
time-nuts at febo.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
>
>
>
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