[time-nuts] HP 10544

[paul swed]

Bert that is helpful. I can see that pretty much the 10544 output is that
ic.
Bruce there is a cap feeding it if the signal is clean there and the voltage
is fine feeding the chip it would tend to be the ca3045. That could be
replaced by many modern amplifiers if the chip could not be obtained.

On Fri, Jan 15, 2010 at 7:39 PM, Bruce Griffiths <bruce.griffiths at xtra.co.nz
> wrote:

> ewkehren at aol.com wrote:
>
>> Attached is a scan of the schematic of the 10544 vintage 1976 given to me
>> by HP as part of TI's work on the first GPS receiver. Maybe it will  help.
>>  Bert Kehren
>>
>>
>>
>>
> That circuit appears to be for the early, higher phase noise version.
> The later version extracts the oscillator output signal through the crystal
> rather than from the emitter of the oscillator transistor..
>
> Bruce
>
>
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