[time-nuts] Example of clocks interlocking with each other

[Jim Lux]

On 9/14/13 11:22 AM, Joe Leikhim wrote:
> Microwave injection locking of Magnetrons with beam steering phased
> array. Lots of math!
>
> http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=4&ved=0CDkQFjAD&url=http%3A%2F%2Fwww2.iee.or.jp%2Fver2%2Fhonbu%2F14-magazine%2Flog%2F2008%2F2008pdf-b%2F2008_09b_06.pdf&ei=vKY0UqywHIzs9ASOoYDAAQ&usg=AFQjCNGa_vBahvbPfxqNR8KzQ7RDzJV4tA&bvm=bv.52164340,d.eWU
>

I prefer the array of 2.45 GHz magnetrons in the weed burner.
http://typnet.net/Articles/WeedKiller.pdf
  Vidmar, 2005, in Microwave Journal

By the way, googling "microwave weed burner" to find this article turned 
up another application of microwave heating for a very different kind of 
weed.


I keep waiting to see something like this show up at the science fair, 
driven by an Arduino that recognizes the weeds and turns the microwaves 
on and off.



>
> Back in the day, Microwave Associates manufactured a pretty nifty GUNN
> diode based FM microwave link for video cameras that operated in the
> 12-13 GHz band. The transmitter GUNN oscillator was pumped from a
> crystal controlled multiplier chain. At the reciver, an AFC derived from
> the discriminator kept the link stable.

the famous "gunnplexer"  also available in the 10.5 and 24 GHz bands.

Crummy phase noise, so you're not going to be doing 1 bit per second, 
but makes sending video using FM pretty darn easy.


>
> Interestingly to time-nutters, since it was FM system, you could insert
> a reference at the TX video input and extract it at the RX without any
> noticible error. For giggles I connected a G5RV antenna to a TX and a
> shortwave RX to the TR and could tune the SW band faithfully.
>