Re: [time-nuts] End of Range Oscilloquartz 8600-3 (Pictures)

[Ulf Kylenfall via time-nuts]

 
All,
I have some pictures of the disassembled unitas of the state of it right now.
Where can I upload them?
73
Ulf Kylenfall - SM6GXV
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Re: [time-nuts] End of Range Oscilloquartz 8600-3

[Christopher Hoover]

I got into the package out of the dewar of my FTS 1200-100 without breaking
it:

https://photos.google.com/share/AF1QipPxJF0Fn6_
gSjXQzk3OhoAhvgqizxmo4A41bIdyk8FrpkNIOfW5Q5feLwLsO4od8Q?key=
NmRRejU0eEYtVUQ4ZURTMnE4cXZEOWtIVmtQZTZB

-ch
73 de AI6KG


On Tue, Dec 12, 2017 at 3:50 PM, Magnus Danielson <
mag...@rubidium.dyndns.org> wrote:

> Hi Ed,
>
> Thanks for the pictures. I had to change the dewar flask on one of mine,
> so I saw about the same thing some 10 years ago or so, but memory.
> Didn't go all the way into the oscillator.
>
> The oscillator picture is mirrored.
>
> Cheers,
> Magnus
>
>
> On 12/12/2017 06:32 PM, Ed Palmer wrote:
>
>> 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/Oscilloq
>> uartz%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,   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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>> time-nuts mailing list -- time-nuts@febo.com
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>> ailman/listinfo/time-nuts
>> and follow the instructions there.
>>
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Re: [time-nuts] End of Range Oscilloquartz 8600-3

[Magnus Danielson]

Hi Ed,

Thanks for the pictures. I had to change the dewar flask on one of mine, 
so I saw about the same thing some 10 years ago or so, but memory.

Didn't go all the way into the oscillator.

The oscillator picture is mirrored.

Cheers,
Magnus

On 12/12/2017 06:32 PM, Ed Palmer wrote:
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,   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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Re: [time-nuts] End of Range Oscilloquartz 8600-3

[Dana Whitlow]

I looked at the photos, but can't make any sense of your comments about the
multivibrator.  Was this a joke?

Dana


On Tue, Dec 12, 2017 at 11:37 AM, Bob Albert via time-nuts <
time-nuts@febo.com> wrote:

>  You found the secret.  There is no RF wiring to the crystal.  The
> oscillator frequency is determined elsewhere, with a free running
> multivibrator that is approximately on the right frequency.  All this talk
> about precision is baloney; the circuit is stable enough to fool even the
> experts.
> And it's not even April 1 yet.
> Bob
> On Tuesday, December 12, 2017, 9:32:44 AM PST, Ed Palmer <
> ed_pal...@sasktel.net> wrote:
>
>  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,   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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> time-nuts mailing list -- time-nuts@febo.com
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> mailman/listinfo/time-nuts
> and follow the instructions there.
>
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> mailman/listinfo/time-nuts
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Re: [time-nuts] End of Range Oscilloquartz 8600-3

[Bob kb8tq]

Hi

I would bet that the design changed a bit since 1983. That is a “long time ago” 
in terms of OCXO design. Since we are picking up this stuff surplus or pulling 
it out of older gear, who knows what era this or that example might come from. 

Bob

> On Dec 12, 2017, at 12:32 PM, Ed Palmer  wrote:
> 
> 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,   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
>> 
>> 
> 
> ___
> time-nuts mailing list -- time-nuts@febo.com
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Re: [time-nuts] End of Range Oscilloquartz 8600-3

[Bob Albert via time-nuts]

 You found the secret.  There is no RF wiring to the crystal.  The oscillator 
frequency is determined elsewhere, with a free running multivibrator that is 
approximately on the right frequency.  All this talk about precision is 
baloney; the circuit is stable enough to fool even the experts.
And it's not even April 1 yet.
Bob
On Tuesday, December 12, 2017, 9:32:44 AM PST, Ed Palmer 
 wrote:  
 
 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,   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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Re: [time-nuts] End of Range Oscilloquartz 8600-3

[paul swed]

As much as the pictures are interesting the sites blasting out crazy
amounts of ads
Totally a problem. Touch anyone of them and off you go to whatever it was.
Regards
Paul
WB8TSL

On Tue, Dec 12, 2017 at 12:32 PM, Ed Palmer  wrote:

> 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/Oscilloq
> uartz%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,   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
>>
>>
>>
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/m
> ailman/listinfo/time-nuts
> and follow the instructions there.
>
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Re: [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,   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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Re: [time-nuts] End of Range Oscilloquartz 8600-3

[paul swed]

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@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
>
>
>
> ___
> 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.
>
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Re: [time-nuts] End of Range Oscilloquartz 8600-3

[Bob kb8tq]

Hi

One of the basic issues with a quartz resonator is that it is sensitive to 
barometric pressure. 
Some are more sensitive than others, but there always is some effect. Various 
techniques 
get used to isolate the resonator. Solder sealing (or welding) the package 
closed is one of 
them. The inner oven in the 8600 may well be sealed up pretty tight …. I would 
expect the
parts you need to get to are all in there with the resonator. 

Bob

> On Dec 12, 2017, at 2:59 AM, Ulf Kylenfall via time-nuts  
> 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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Re: [time-nuts] End of Range Oscilloquartz 8600-3

[Howard Davidson]

Can you get an x-ray of the core?


Sent from Yahoo Mail for iPad


On Tuesday, December 12, 2017, 12:00 AM, Ulf Kylenfall via time-nuts 
 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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Re: [time-nuts] End of Range Oscilloquartz 8600-3

[Ulf Kylenfall via time-nuts]

 

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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