[time-nuts] Re: info on Tele Quarz Group 5 MHz oscillator?

[Wilko Bulte]

"Who dares wins". Armed with a current-limited lab supply I arrived at the pinout pictured below. Uref ~= 7.87 V, Usup = 12V. Isup ~= 0.5 A during warmup. Steady state Isup ~= 0.2 A. Output is sinewave. 



Sent to the list for the benefit of Google e.a. 

thanks!
Wilko

> On 11 Dec 2023, at 17:21, Bob kb8tq <kb8tq at n1k.org> wrote:
> 
> Hi
> 
> Ok, it’s pretty obvious that one of the 5 pins is hooked to the case. Typically that means it is the ground / supply return pin. On the most common pinout these days for that same package, the ground is in a different location. One of many examples of this pinout:
> 
> https://www.morion-us.com/catalog_pdf/mv89.pdf
> 
> As shown, all 5 pins have a specific function. 
> 
> With no Vref there might be a ground pin at the Vref location. If there is another pin doing the “return” function, that should be pretty obvious with an ohmmeter test. This is pretty unlikely.
> 
> Supply wise, best guess is 12V, 24V would come in second. A distant third would be “something between 10 and 28V”.
> 
> Bob
> 
>> On Dec 11, 2023, at 5:29 AM, Wilko Bulte <wkb at xs4all.nl> wrote:
>> 
>> hi Bob,
>> 
>> Thank you. It is ancient but appears to be NOS at the same time. So maybe interesting to study its aging (?).
>> 
>> That said: below 2 pictures with a cm ruler for scale purposes.
>> 
>> <image0.jpeg>
>> 
>> <image1.jpeg>
>> 
>> Wilko
>> 
>>> On 11 Dec 2023, at 03:36, Bob kb8tq <kb8tq at n1k.org> wrote:
>>> 
>>> Hi
>>> 
>>> If the 40.92 on the label is talking about the 40th week of 1992, that would make this a > 30 year old part. That’s well before folks started putting specs and catalogs up on the internet …. It’s also pretty far back in the whole: Tele Quartz => Oak => Corning => Vectron => Microsemi => Microchip progression.
>>> 
>>> A picture of the package might help folks come up with something that could help ( = a lot of these packages had common pinouts ….).
>>> 
>>> Bob
>>> 
>>>> On Dec 10, 2023, at 12:51 PM, Wilko Bulte via time-nuts <time-nuts at lists.febo.com> wrote:
>>>> 
>>>> Last week I bought a tinyPFA (does that count as a light frequency-nut infection?). The first measurements with TimeLab have been made (more on that later). As it goes, I am obviously experimenting (and scratching my head..) a lot right now.
>>>> 
>>>> Next plan is to measure my Efratom FRK-HLN 5 MHz unit against a brand new 5 MHz Tele Quarz Group oscillator I acquired at a ham fest.
>>>> 
>>>> Only problem: no data on pinout or specs that I could find on the net. Maybe someone on this list can help me?
>>>> 
>>>> 73 Wilko
>>>> PA1WBU
>>>> 
>>>> 
>>>> 
>>>> <image1.jpeg>
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>