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NERW -- Spark gap?

To: boston-radio-interest@bostonradio.org
Subject: NERW -- Spark gap?
From: hmglaz@webtv.net (Howard Glazer)
Date: Thu, 13 Dec 2001 16:06:21 -0500 (EST)
In-Reply-To: owner-boston-radio-interest-digest@bostonradio.org (boston-radio-interest-digest)'smessage of Thu, 13 Dec 2001 12:38:16 -0500 (EST)
Sender: owner-boston-radio-interest@bostonradio.org

Scott Fybush mentioned in the latest NERW that Canadian ham VE3BBN
planned to fire up a spark gap transmitter on 3550 kHz on 12/12, the
100th anniversary of Marconi's trans-Atlantic transmission.
Unfortunately, I didn't receive the digest until today, so I missed it.

However, isn't spark gap transmission, by its nature, extremely broad?
How did VE3BBN confine such a signal to 3550 and not wipe out the whole
80 meter band?

Howard

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