[Lowfer] spark microwave transmitter

Sun, 3 Aug 2003 17:05:29 -0400

Actually the first experiments using spark to generate RF
were on UHF frequencies. It is still a pretty noisy broad banded thing
GunPlexers which are self oscillating are narrow by comparison
there is some joking about using spark to generate Micrometer waves
not sure what the upper end of allocated RF is,,,,,, 300 Gig  ?? but the
boys
that play around up there can work some distance with little RF. Spark
generated MW
energy up there should be doable

How about spark generated ELF say at 3000 cycles  ??

Har

Bob  K3DJC

On Sun, 3 Aug 2003 13:19:02 -0700 (PDT) james fisher <[email protected]>
writes:
> As I understand it spark was banned because it used up
> too much spectrum space, However with modern tuned
> microwave filters it would be easy to filter the
> output of a spark microwave transmitter to a very
> narrow wavelength. If you cemented a piezo disk to one
> side of the filter (tuned cavity) you could feed audio
> to the piezo disk and frequency modulate the rf
> output.
> So spark fm is possible. With a high frequency spark
> am was transmitted by using a bank of carbon
> microphones in the tank circut of a spark transmitter
> the exact date escapes me but it was before 1920.
> 
> kd6iwd
> 
> __________________________________
> Do you Yahoo!?
> Yahoo! SiteBuilder - Free, easy-to-use web site design software
> http://sitebuilder.yahoo.com
> _______________________________________________
> From the Lowfer mailing list
> Send messages to: [email protected]
> To sub/unsub visit: http://mailman.qth.net/mailman/listinfo/lowfer
> 
> 