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References: [ +from:john@g3xrj.com: 5 ]

Total 5 documents matching your query.

1. Topband: K9AY performs better on MW bcast and TB than 80m (score: 1)
Author: "John - G3XRJ" <john@g3xrj.com>
Date: Mon, 2 Jan 2006 21:35:05 -0000
My new K9AY with 85 ft loops and Vactrol f/b is much better on Medium Wave Broadcast band than 160m or 80m. MW f/b is 20/30db, 160 f/b is 15/20 db but 80m only 10db at best. Grounding is by centre st
/archives//html/Topband/2006-01/msg00012.html (6,878 bytes)

2. Topband: Daylight QSO (score: 1)
Author: "John - G3XRJ " <john@g3xrj.com>
Date: Sun, 6 Jan 2008 14:30:33 -0000
As a Coast Radio Station operator I spent the best part of 30 years listening to such effects on 2182khz UK coast stns ran 1kw into vertical antennas while our European friends sometimes a bit more p
/archives//html/Topband/2008-01/msg00060.html (7,776 bytes)

3. Re: Topband: 'Hairpin' matching (score: 1)
Author: John Chappell G3XRJ <john@g3xrj.com>
Date: Fri, 20 Sep 2013 15:05:25 +0100
Just measured the 'hairpin' coil for my 160m 38 foot top loaded - coil and 2 x 18 foot wires - antenna. Feedpoint impedance without match is 12 ohms. Placing shunt coil to ground of 1.7microH and tx
/archives//html/Topband/2013-09/msg00282.html (7,795 bytes)

4. Re: Topband: Unknown Pulse Signal Wiping out 1900-1925 kHz (score: 1)
Author: John Chappell G3XRJ <john@g3xrj.com>
Date: Mon, 08 Dec 2014 08:24:02 +0000
Report from Land's End UK Pulsing s7 here from NW quadrant 30 mins before Sunrise. Only K9AY for rx but definitely NW'ish. Fading down as going through Sunrise and now s3-4 20 mins after SR. 73 John
/archives//html/Topband/2014-12/msg00121.html (9,195 bytes)

5. Re: Topband: Shunt-Fed tower how-to Video (score: 1)
Author: John Chappell G3XRJ <john@g3xrj.com>
Date: Thu, 25 Apr 2019 10:16:20 +0100
Steve, That's an excellent video. Both in the technique of shunt feeding and the overall video presentation which sets the bar. Most impressive. 73 John G3XRJ This week I added a second gamma-wire to
/archives//html/Topband/2019-04/msg00165.html (7,924 bytes)

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