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Re: And what of the FCC?
---------- Forwarded message ----------
Date: Tue, 30 Sep 1997 21:51:56 -0700
From: randy-at-gte-dot-net
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: And what of the FCC?
Tesla List wrote:
>
> ---------- Forwarded message ----------
> Date: Mon, 29 Sep 1997 07:17:08 -0400 (EDT)
> From: Paul Anderson <paul-at-geeky1.ebtech-dot-net>
> To: Tesla List <tesla-at-pupman-dot-com>
> Subject: Re: And what of the FCC?
>
> On Sun, 28 Sep 1997, Tesla List wrote:
>
> >
> >
> > ---------- Forwarded message ----------
> > Date: Sun, 28 Sep 1997 15:43:18 -0700 (PDT)
> > From: "Edward V. Phillips" <ed-at-alumni.caltech.edu>
> > To: tesla-at-pupman-dot-com
> > Subject: Re: And what of the FCC? (fwd)
> >
> > True. A Tesla coil is a very short helical resonator, and
> > doesn't have enough radiation resistance to do much out of the local
> > induction field. However, long leads from the spark gap can resonate
> > at VHF, causing significant TV interference. Keep those short...
> >
> Of course, the FCC and/or CRTC only come knocking if your neighbour
> complains. That's where it's handy to live in the country, 'cause (a)
> you're seperated from your neighbours by a distance greater than 100 feet,
> and (b) if you screw with their TV reception they'll blame it on a
> sunspot(no cable in town:)<EG> TTYL!
>
> ---
> Paul Anderson
> paul -at- geeky1.ebtech-dot-net
> Author of Star Spek(a tongue in cheek pun on Star trek)
> e-mail: starspek-request-at-lowdown-dot-com with subscribe as the subject
> I hear it's hilarious. Maintainer of the Tips-HOWTO.
> http://www-dot-netcom-dot-com/~tonyh3/speck.html
> RAM DISK is NOT an installation procedure!
All of these posts regarding RFI etc have caused me to wonder:
What is the difference between a rotary gap TC and the prehistoric
rotary gap CW transmitters? Is it just a matter of tuning a TC to
deal with an antenna instead of a toroid or sphere as the "load"?
I have heard recordings of these signals from way back when, and I
can tell you that if the local birds sounded so melodious, we would
all spend our spare time outside blowing our feathered friends the
way of the Passenger Pigeon. If you have ever heard the Russian
Woodpecker on HF (shortwave, if you must), then I can tell you the
Woodpecker was much more agreeable of a sound. The Woodpecker was either
Soviet OTH radar, or a Soviet mind control device, depending who you
want to believe.
I dont know much about sparkgap transmitters, but I am pretty sure they
contained no active device, if you will, such as a vacuum tube.... so
mustn't they have been pretty much a TC? They were about the same freqs,
as I recall.
BTW, 500kHz is still very much an int'l distress frequency, the last I
heard. More of a ship freq than anything else, to my knowledge. So is
2182 kHz. Correct me if I am wrong tho.
Randy