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From: charlie@oakhill.UUCP (Charlie Thompson)
Newsgroups: rec.ham-radio,rec.radio.shortwave,sci.electronics
Subject: VLF Aircraft Radio Beacons
Keywords: VLF Beacons
Message-ID: <4251@radio.oakhill.UUCP>
Date: 28 Nov 90 05:56:38 GMT
Organization: Motorola Inc. Austin, Tx
Lines: 17

Across the USA there are hundreds of VLF aircraft navigation
beacons know as NDB's (non-directional beacons).  They operate
in the 200 KHz to 400 Khz range. 

Does anybody know what output power NDB's utilize?  I can hear
the CW identifier from them as much as 200 miles away and I am
trying to determine whether this is excellent reception or just
typical. My antenna is a homemade 'active' whip which is about 10
feet long. I was told that NDB's are low power in order to minimize
interference between beacons operating on the same frequency in
different geographical locations.

Knowing the answer to this question will help me determine the
effectivness of my active VLF whip. WWVB comes in so-so at 60 KHz.

Thanks in advance,
Charlie WB4HVD