300m long kite antenna for VLF transmission

Stefan DK7FC has now received permission from the German authorities to use a 300m long kite antenna in daylight to transmit below 9kHz. With this antenna, 200m longer than his previous one, he should be able to run up to 16mW ERP which is 10dB more than when he lasted tested on 8.97kHz. A stronger signal should allow more stations to copy his signal.

GQRP Limerick Sudden kit

The GQRP club (subs £6 per year - excellent value) is now selling the Limerick Sudden kit. This is an improved version of the classic Sudden direct conversion receiver for various single HF bands. The cost includes everything you need including battery , knobs and case. See http://www.gqrp.com/sales.htm. Members Price - only £34.00 (Non members £40)

Supporting MS research by skydiving

A young friend of ours, Josie, has multiple sclerosis (MS) very badly and it has devastated her life in many ways. Undaunted, yesterday Josie did a skydive to raise money for the MS Society charity. So far she has raised over £1500. She is so plucky. If you care to give something please visit http://www.justgiving.com/Jo-Hardiman. Two others in our family have had MS, one of whom died a few years ago. It really is a most awful condition that robs, mainly young people, of their hope and future. Josie's uncle was Len G4IRZ.

Not quite QRP - the Haiku Omega VLF transmitter

Jim M0BMU has posted a link on the LF reflector to a site showing the Omega beacon antennas and transmitter at Haiku Valley in Hawaii. This very accurate beacon system operating just above 10kHz. It has now closed being largely replaced by GPS. My house and entire garden would fit twice in the room shown as "the dummy load room".

VHF NFD next weekend

Next weekend it is VHF NFD so there will be a good opportunity for some QRP DXing on the VHF bands. In past contests I've managed to work way up to Scotland from here with just a small halo and 5W. This sort of DXing sometimes requires going on to CW to complete contacts though. Best times, ignoring conditions, are usually early Sunday morning as the sun is rising, when tropo conditions are good, or late in the contest when stations are looking for new stations to work.

Kanga Products kits

The well known range of QRP kits from Kanga are now available again in the UK. These include the FOXX3 transceiver and the Sudden receiver. See the Kanga Products UK website.

Live 8.97kHz transmission from Germany

DK7FC is transmitting now (0800-1100z) on 8.97KHz. His signals are visible on his 8.97kHz grabber . Stefan is testing further improvements to his earth electrode antenna. The message is very clearly "73" sent in DFCW 600.

Nuclear submarines + UK Trident nuclear deterrent

There's a programme on BBC TV tomorrow about the design and building of the UK's latest nuclear submarine. The preview said that each costs 1 billion UK pounds to build!! Couple this with the 100 billion pounds we are likely to spend on upgrading Trident nuclear weapons and we are talking about a huge amount of money.  I find these sums on such weaponry obscene and plain wrong. If similar amounts were invested in the search for sustainable energy sources I'd be much happier.

More 500kHz WSPRing with the earth electrodes "antenna"

This evening I've again been running my 500kHz QRP transverter into the earth electrodes separated by 20m of wire at about 1.5m above ground only. Reports from M0BMU (69km) and G0KTN (210km) confirm that this is only 6-8dB worse than my spiral top loaded 5m long vertical (i.e. ERP is now between 50-100uW). At the moment the only antennas I have up are a disconnected V2000 VHF/UHF vertical and this earth electrode antenna also used on 838Hz VLF, so the signal is definitely just what's coming from the loop formed in the ground.

German VLF earth mode test: 5.2 km on 8.97 kHz

Stefan DK7FC has been doing some experiments with around 50W to a 300m spaced grounded earth electrode "antenna"  in a remote location in Germany. Today his experiments were successful with his transmission of 30 minutes clearly received on his E-field probe receiver and grabber located in the city some 5.2km away.  See the report on his experiments at  http://www.iup.uni-heidelberg.de/schaefer_vlf/VLF_5km_with_an_earth_antenna.pdf . Stefan can improve the electrode arrangement and increase current into the ground as well as run up to 500W. He's hoping to see the signal on the DF6NM VLF grabber located 174km away. If successful, this would be the first reported amateur radiated VLF DX using earth electrode antennas.