I would imagine the switch selects every 50 or 100 MHz for easier
identification of harmonic number.
Bob
On Friday, January 4, 2019, 3:10:36 PM PST, Brooke Clarke
<bro...@pacific.net> wrote:
Hi:
Made by Control Electronics Co. Inc, Model 121, with Navy Calibration Program
stamp.
This is a comb generator with outputs between 50 and 11,000 MHz that uses a 50
MHz crystal as the source.
There's a switch for 50 or 100 Mhz the function of which I don't get.
The 12AT7 dual triode tube used as the oscillator has the crystal connected
between the two cathodes, a configuration I
haven't seen before.
The output circuit also seems strange.
Any thoughts or links to documentation?
https://prc68.com/I/VHF-UHFFrequencyCalibrator.shtml
--
Have Fun,
Brooke Clarke
https://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
axioms:
1. The extent to which you can fix or improve something will be limited by how
well you understand how it works.
2. Everybody, with no exceptions, holds false beliefs.
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