[time-nuts] Austron 1120 octal based oscillator

GandalfG8 at aol.com GandalfG8 at aol.com
Wed Jul 30 11:35:09 EDT 2014

I've recently acqured an octal based 4.096Mhz Austron  1120 oscillator that 
physically at least is a close match to the unit shown  in the data sheet 
on Didier's site.
However, this one, model 1120-1FWT dated 1981, which was indicated as  
being ex aircraft, looks to have significant connection differences.
Pins 2, 3, 5 and 7, for example, are all grounded to the case, whereas  the 
data sheet shows pins 2 and 3 as being respectively a 4V positive output 
and  the positive supply input.
Pin 1 has a consistent resistance of 4.6Kohm to ground and the  other pins 
all have resistances to ground of several megohms that show  variation if 
the meter polarity is reversed, suggesting the possibility of  capacitors 
across these.
>From what little I've seen of other Austron oscillators they do seem  to 
have been quite consistent with their use of pin 3  as supply positive, which 
might not be good news, but I'll  assume for now that all is as it should be.
However, before I risk a bit of trial and error, has anybody else come  
across this or a similar variant or have any additional 1120 data that might be 

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