[Premium-Rx] Manual Wanted: CEI Standard Frequency Multiplier

[Brooke Clarke]

Hi Jeremy:

I'm guessing Injection Locking.  An oscillator will tend to change it's frequency if there's a signal near it's 
resonance frequency. This effect was seen first with pendulum clocks, and was a common practice with tube oscillators.
https://en.wikipedia.org/wiki/Injection_locking

-- 
Have Fun,

Brooke Clarke, N6GCe
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.

-------- Original Message --------
> Finally got my CEI Standard Frequency Multiplier 100% working. Introduced
> by Communications Electronics, Inc., in September 1964, the SFM-1 appeared
> in the 1966 CEI catalog (page 106). It must have been a short-run
> instrument because it is not in the 1968 CEI catalog (after CEI was merged
> into Watkins-Johnson). Thanks to Terry O's site, I now know the SFM-1 was a
> standard product, not a one-off, special or prototype. Mine was a very
> early model, serial 102. Wonder how many they sold?
>
> Using a mix of transistors, Nuvistors, and metal-ceramic UHF triodes, the
> SFM-1 takes a 1 MHz input signal and produces 50, 100, 500, and 1000 MHz
> outputs (available simultaneously), with the same stability and accuracy as
> the input reference source. I have no idea what I'm going to do with this
> thing but it's a fun toy.
>
> Still looking for a manual; it would be nice to understand HOW this thing
> does what it does.
>
> Jeremy
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