[Lowfer] Rememberances or "I was a bootlegger too!"

[Kent Andersen]

I must say, that as a young boy of about 8, my father had happened to give 
me an igition coil. This is where I really learned about High voltage,
My neighbors knew exactly when I was making sparks because it seemed to have 
screwed the TV singals up for about a block in each direction.
After a few angry neighbors came over complaining, I had to observe "quiet 
hours" :)


----- Original Message ----- 
From: "Ed Phillips" <evp at pacbell.net>
To: "Discussion of the Lowfer (US, European, &amp; UK) and MedFer bands" 
<lowfer at mailman.qth.net>
Sent: Sunday, September 07, 2008 12:48 PM
Subject: Re: [Lowfer] Rememberances or "I was a bootlegger too!"


>
> That's similar to Sir Jagadis Chandra Bose's millimeter-wave sources of
> the late 1800's. He used tiny spark gaps in waveguide to generate 
> mm-waves.
>
> 73, Zack W9SZ
>
> On Sat, 6 Sep 2008, Ed Phillips wrote:
>
> Speaking of spark-excited transmitters I should probably mention that in
> the past few months I've been experimenting with a microwave gadget.
> Spark gap in 7/8" diameter copper pipe, driven by a solid state pulser.
> Puts out pulses of the order of a couple of nanoseconds long at a rep
> rate of 20 kHz. Peak pulse power appears to be of the order of a half
> watt [no average power of course] and frequency is of the order of 8 to
> 12 GHz. [All at once of course.]
>
> Ed"
>
> Except for the solid-state pulser instead of Bose's induction coils this
> stuff is nowhere near as sophisticated as his. I'm using a regular WR90
> diode mount for a detector but he rolled his own and appears to have
> invented and characterized the first real point contact detectors -
> haven't seen anything earlier. All in all a remarkable guy who did
> fantastic work over 100 years ago and I'm surprised he hasn't received
> much attention until the past few years. One of my college profs [1945]
> had told our class about him and his demos but there weren't any
> pictures of his apparatus. I've always thought it would be interesting
> to try to duplicate his experiments exactly as he did them, at his
> original wavelength, but no ambition. Have played with duplicating
> Hertz's experiments with considerable success except that I cheated and
> used a diode detector in place of his tiny spark gaps.
>
> Ed
>
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