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From: caf@omen.UUCP (Chuck Forsberg WA7KGX)
Newsgroups: net.ham-radio
Subject: Re: Re: Active antennas for shortwave listening
Message-ID: <301@omen.UUCP>
Date: Tue, 25-Feb-86 09:09:04 EST
Article-I.D.: omen.301
Posted: Tue Feb 25 09:09:04 1986
Date-Received: Fri, 28-Feb-86 21:26:09 EST
References: <2586@vrdxhq.UUCP> <701@ihwpt.UUCP> <136@ky2d-2.UUCP>
Reply-To: caf@omen.UUCP (Chuck Forsberg WA7KGX)
Organization: Omen Technology, Portland
Lines: 9

I've used a Dymek DA-100 antenna for a few years, about ten years ago.

Good results on BC and LF, not so good at ten meters.    With the whip
on top of a 20-40' grounded tower, noise pickup was much reduced.
Cross mod from 100 kHz Loran-C was a nuisance, and I've blown three input
fet's over the years.  Make sure you get one that isn't potted!

It's been a while since I've experimented with active antennas, but I'd
be tempted to try a source follower with a power fet.