[time-nuts] VHF-UHF Frequency Calibrator

[Bill]

For low cost comb generators/frequency markers take a look at 
www.hsmicrowave.com

Regards...Bill - N6GHz

On 1/4/2019 3:29 PM, Bob Albert via time-nuts wrote:
>   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 <brooke at 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
>