weird rack unit

Chuck Guzis cclist at
Mon Aug 10 19:45:23 CDT 2020

On 8/10/20 2:44 PM, Al Kossow via cctalk wrote:
> On 8/10/20 12:40 PM, Chuck Guzis via cctalk wrote:
>> 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?
> There was a discussion of this on the cctalk discord
> It was made for the USGS to study the earth's magnetic field

Anyone remember the Popular Electronics "Carl and Jerry" episode that
involved a baby bottle full of water with a coil wrapped around it?

"The Educated Nursing Bottle" April, 1964, PDF page 82 here;

An interesting article about using a 7090 to determine the cause of WWI


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