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, <[email protected]> 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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