On Thu, 31 Jul 2014 20:34:32 -0400, Jerry Stuckle
wrote:

Could be - but what was radar doing at 200Mhz? Not only will it
interfere with both business band and amateur frequencies, but the large
beam width would make it pretty useless. And as weather radar, it would
be useless.

Left over from the cold war. Someone forgot to turn it off or
something.

214-236 Mhz. Not sure about the pulse repetition frequency but it had
to be fairly low audio frequency in order to obtain the long range. At
3500ft elevation, the radar range is 84 miles.

Some of the URL's below show 420 to 450 MHz for the AN/FPS-24. That's
wrong for the early models. Built in 1957 and pulled the plug in
1980:
http://en.wikipedia.org/wiki/Mount_Umunhum
http://en.wikipedia.org/wiki/AN/FPS-24
http://www.radomes.org/museum/equip/fps-35.html
https://www.google.com/search?q=mt+umunhum+radar&tbm=isch
https://www.youtube.com/watch?v=nqfsWBZR8XM
I can see the building through the trees from my house. Amazing what
5 megawatts can do.

The dish rotated at the then standard rate of two revolutions per
minute. So, every 30 seconds, there was a blast of buzz from the
hi-fi, 2way, phone, and oven (I didn't have a TV back then). I
learned to automatically stop talking just before the bzzzzzt, and
continue talking after it was gone in about one second. When they
pulled the plug in 1980, I continued to do this unconsciously for
several months. Incidentally, I tried bypasses and ferrite beads.
They helped, but didn't totally eliminate the buzz. Transcribing
vinyl records to 1/4" tape was a lost cause.



--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558