I was recently evolved in a discussion about the HP 58503 option 001 display.
The general idea is that there is some command to tune the display on or off.
A few ideas were offered but no one had anything except "they heard about it."
I have found nothing on the subject from old HP literatur
Hi
Both control loops in the 3801 OCXO’s are thermistor based. If the outside loop
goes nuts, the device might survive. If the inside loop shorts out, the normal
result is a melt down of the OCXO innards.
Bob
> On Jun 2, 2022, at 9:55 AM, K5jv via time-nuts
> wrote:
>
> I was recently evol
Hi Lon, hello to all members.
In 1995 the art of temperature control was a good bit more advanced,
and a bi-metal thermostat would not be stable enough These ovens have a
semiconductor temperature control; so I would suspect a shorted
transistor.
These failures in OCXO are not that rare, an
I've been working on final design cleanup, mainly in the RF. I found
quite a bit of spurious LO harmonic content up to almost 2 GHz, with
some quite strong (-75 dBm). It was time to clean up the experimental
wiring layout, so I simplified the cabling and consolidated the RF stuff
onto the LPF b
Lon, K5JV said:
> Comments from anyone who has actually seen inside one of these ovens would be
> appreciated.
http://www.realhamradio.com/GPS-oven-journey.htm
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For lots of info on the Z3801A start here:
http://www.realhamradio.com/GPS_Frequency_Standard.htm
(Time sink warning.)
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