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Author Topic: Ancient Transmitting caps?  (Read 2663 times)
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Bill, KD0HG
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304-TH - Workin' it


« on: June 02, 2011, 08:08:17 PM »

OK, here's the deal. I don't want a penny for several 1930s transmitting caps I found.

I inherited maintenance on an old-timey directional AM. The previous engineer is SK. He was a major packrat. Drawers of ITC cart machine parts and tape heads, for example. But he also left behind a bunch of BIG, old-time transmitting caps that predated the station.

A picture of one is below. It's dual-branded "Faradon" amd "Cornell Dublier", 500 pf at 30 KV. Note the spark gap on the side of the thing.

Looks like filled with beeswax in a Pyrex case.

I am looking for some sort of radio museum that might want the things. It's not every day that you can find a 30 KV cap these days..Even if running spark.

Suggestions welcome.


* faradon.jpg (21.8 KB, 640x480 - viewed 416 times.)
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KB2WIG
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« Reply #1 on: June 02, 2011, 10:18:29 PM »

The AWA u ze AM?


http://www.antiquewireless.org/


klc
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What? Me worry?
w3jn
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« Reply #2 on: June 03, 2011, 07:24:41 AM »

Pavek Museum of Broadcasting in Minneapolis

www.pavekmuseum.org/
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KM1H
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« Reply #3 on: June 03, 2011, 08:25:31 AM »

Id be interested in a few between 500-2000pf for a 500KHz antenna, there maybe a lot of strange things happening at the base when I go QRO.

Carl
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K2PG
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« Reply #4 on: June 03, 2011, 08:39:39 AM »

Why don't you use some of those goodies yourself? At my 160 meter station, I use ITC cart machines for repetitious announcements, such as "CQ" calls. I use some of those capacitors (although mine are not as old) in a T-network at the base of my folded unipole antenna. The unipole is physically and electrically short for my operating frequencies, so I set up a T-network in PA and a pi-network at my place in NJ.

Cornell-Dubilier used to be located in South Plainfield, NJ, not far from the town where I grew up.
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