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G8NDL England flag England

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Thank you for visiting my page.

My main interest is HF. When the ionosphere cooperates I can be found using digi modes on 30m. Although I can work on any band on HF from 80m to 10m, also 6m, 4m, 2m and 70cm.

WSPR is my favourite mode at the moment running WSPRLite at 200mW and I am happy to report a distance of 17056km on 30m running 200mW into the 30m antenna (2017-02-17 16:10 to 19:04, 5 spots).

I enjoy designing and building, one project I am currently involved in is the design and construction of small HF antennas, two of which are pictured above. The lefthand antenna works on all bands 20m through to 6m without an ATU. The longer one works on 20/17/15m. We have a very small garden which is open to public view, I therefore need very small HF antennas. Two other prototype HF antennas are shown below in the photos. I have also completed a remote 5-way antenna switch which is working well, parts of which are shown below. This design was published in QST over a year ago and has been successfully constructed in the UK, USA and Australia.

I am very pleased to have received the Ostermeyer trophy from the RSGB in their centenary year for a published article in RadCom 2012. This coincides with my twenty fifth year of writing. That article was published during two issues of a VSWR meter I designed. One of the VSWR meters is in constant use each time I go on HF.

There are two HF antennas and one 2m/70cms vertical working with the current station which comprises of:

Radios:  Icom IC-7410, Yaesu FT-991, Smallwonderlabs 30m & 20m QRP digi rigs, Pye MX294 (2m), Motorola MCS 2000 (70cms), Midland CT-890 and an Icom IC-90E.

HF ATU: MFJ-901B & SG-239 (x2) Smart tuners.

Antennas (HF): Mast mounted multiband vertical (3.5, 5, 7 and 10MHz) on the right hand side. Multi-band vertical (14, 18, 21 and 29MHz) shown on the left hand side below. Also a 2m/70cm vertical (garden), and a UHF Slim Jim for 70cms, 2m 3 ele beam in loft, 7 ele 70cm beam in loft, remote relay switched. All the outside antennas (HF & 2m/70cms) are all automatically switched under computer control from the shack. Also a 14, 18, 21, 24, 28-30 and 50-52MHz test antenna (no ATU needed) is erected in the garden for testing when I have the opportunity.

Below left, the antenna installation.                                                             Below right, the current station

One of the two SG-239 auto ATUs. Power to the auto ATU and the 5-way switch is provided down the coaxial feeder with the bias tee shown.

The new remote 5-way switch slave box below  is used to switch the antennas from the computer. DC power. RF, signalling  and DC power all go down 100 feet of RG213 coax to the antennas. This replaces the SPDT coax relay previously used. The master unit is positioned in the shack along side the radios, the red coloured box above the radios. Both master and slave units have been produced on new PCBs.

VSWR meters: Revex W570, and two home brew HF digital VSWR meters.

My website: www.skunkworx.co.uk

Please do not send QSL cards as I no longer collect them.


7912682 Last modified: 2017-02-19 15:04:59, 3749 bytes

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QRZ Logbook Summary for - G8NDL
Latest Contacts for G8NDL at QRZ.com
dedateband mode grid Country op
DL7ACA 2014-12-20 30m QPSK31 JO40fg Germany Christian Junge
SV1DAR 2014-01-26 15m PSK31 KM17vx Greece ANTONIS PAPADOPOULOS
SQ7KHZ 2014-01-17 30m PSK31 JO91wh Poland Piotr Majcher
LZ1XM 2014-01-17 12m PSK125 KN12nr Bulgaria Anton Petkov
F1JFR 2013-11-28 30m PSK31 JN38vn France DANIEL DRIESSLEIN
M6TET 2013-11-21 40m PSK31 JO01cl England tony erith
OZ5ACC 2013-11-17 30m PSK31 JO45fl Denmark Hans-Peter
UR5CN 2013-11-16 20m PSK31 KN59wm Ukraine Valeriy Zhuk (Nic - WIL)
CT7ABQ 2013-11-12 40m PSK31 IM58is Portugal Paulo
CT2HFZ 2013-11-05 40m PSK31 IN51qn Portugal CT2HFZ COUTADA
F4BVO 2013-11-03 40m PSK31 JN25vt France OLIVIER SAVIN
W3FFZ 2013-10-28 20m PSK31 FN00ak United States Drew Celley
ON3RSK 2013-10-24 40m PSK31 JO21bd Belgium Dimitri Kennis
IK7GUW 2013-10-10 20m PSK31 JN80lw Italy VITO PASCALE
SA3CFY 2013-10-07 40m PSK63 JP80nq Sweden Ulf Rygaard

Book Totals: 155 qso's   148 confirmed Get a free logbook at QRZ.COM

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