On 2/25/14 1:40 PM, Tom Van Baak wrote:
So what's all this about a Thallium Beam Tube???
For info about the pro/con of Thallium beam frequency standards, see:
http://tf.boulder.nist.gov/general/pdf/9.pdf
http://tf.boulder.nist.gov/general/pdf/211.pdf
http://leapsecond.com/history/1965-Metrologia-v1-n3-Cesium.pdf
Imagine 21310.833946 MHz instead of 9192.631770 MHz...
Excellent, connectors that cost $50 each instead of $5.
Test equipment that costs 5x as much.
I work a lot with 32/34 GHz (deep space Ka-band) at work, and I hate
having to explain to people who haven't had to buy equipment since back
when they worked with X band (7.15/8.45 GHz) that there's a BIG jump in
cost when you cross that 18GHz boundary line.
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