[time-nuts] Vintage Crystal Oven

Dave M dgminala at mediacombb.net
Fri Apr 10 18:47:30 EDT 2015


Thanks George,
I used to work in a Motorola 2-way shop.  The only heated ovens that 
Motorola used were the 6.3V thermostatically controlled ovens.  Those were 
used in the old tube-style units.  When they went solid-state, they used 
TXCOs in both base and mobile units.
However, I'll check them out.  Never know, there might be something useful 
there.

Cheers,
Dave M


George Dubovsky wrote:
> I'm not sure I remember the exact one you are describing, but in the
> last month or so, there was a fellow selling crystal ovens on
> QTH.com. I think they were from land-mobile service, like Motorola
> base stations or some such. That's another place to search.
>
> 73,
>
> geo - n4ua
>
> On Fri, Apr 10, 2015 at 12:37 PM, Dave M <dgminala at mediacombb.net>
> wrote:
>
>> Years ago, (70s maybe) I came across an empty crystal oven. I know I
>> have it
>> in one of the storage containers of old stuff in my garage, but I
>> can't find
>> it.  It was a proportional oven, but was otherwise an empty shell,
>> so you could put your own circuitry inside (oscillator, voltage
>> reference, etc.). Several small wires came out of it for power,
>> temperature adjustment, e.g. Physical size was in the neighborhood
>> of 1.5x1.5x3 inches.
>> As I remember, it was manufactured by one of the major crystal
>> manufacturers
>> of the day (e.g., Knight, Bliley, etc.)
>>
>> Does anyone remember these ovens?  I'd surely like to get my hands
>> on a couple or three to play with.  I search the net & Ebay
>> occasionally for them, but so far, no hits.
>>
>> Dave M





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