weird rack unit

Chuck Guzis cclist at
Mon Aug 10 14:40:22 CDT 2020

On 8/10/20 12:17 PM, Christian Kennedy via cctalk wrote:
> On 8/7/20 4:34 PM, Warner Losh via cctalk wrote:
>> The OCO looks nice. Timing gear maybe?
> Looks like a mid 70's - early 80's three-axis fluxgate magnetometer.
> The precision of a fluxgate is a direct function of the stability of the
> frequency source that is driving the drive winding, so an OCXO makes
> perfect sense.
> My offhand guess would be oil and gas exploration.

I recall that the petroleum industry was among the earliest of adopters
of NMR logging, hailing back to the late 1950s/early 1960s for use in
oil exploration.

Medical use was much later.


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