10m WSPR

This afternoon, for a change, I loaded up my 5m vertical on 10m and have started to WSPR at 5W level. So far, only one report received from G4IKZ just 18kms away at -13 to -15dB S/N. He is running 10W and is about -4dB S/N with me.

So near but so far on 500kHz

Last night again produced some decent DX reports with the 1mW ERP 500kHz station, but still I'm 10kms short of the magic 1000kms target. Best was DL4RAJ at 990kms who spotted be many times during the night. A new reporter this morning was M0GNM in IO91 - thanks for the report.

Haiti appeal - our help is needed

It was good to hear that the GQRP club made a donation to the aid appeal for the survivors of the terrible earthquake in Haiti. The sheer scale of this is terrifying but, if we can afford to do so, we ALL need to give something to help these poor people. In the UK donations may be made on-line via the Disasters Emergency Committee website.

K4TWJ (the "One Transistor Marvel" man)

Yesterday I heard that Dave K4TWJ is in hospital having had a massive heart attack on New Year's Eve. His XYL Sandy, WB4OEE, reports that he is improving and getting stronger. Dave writes articles in several US magazines including CQ and his design for a very simple one transistor transceiver appears in the International QRP Collection book available from the RSGB.

Simple LF/MF QRP transmitter

VE7SL has a neat little LF/MF TX circuit on his website which is suitable for QRP 136 or 500kHz operation. Its original application was for 160-190kHz part 15 "lowfer" beacons in the USA. I used the same PA arrangement in my first 500kHz transverter and I can confirm it is very reliable and robust.

Overnight on 500kHz (1mW ERP)

21 unique stations reported hearing me on 500kHz WSPR last night, but still the 1000kms target has not been reached - so close but so elusive. On RX, I was able to copy LA3EQ, PA0A and SM6BHZ as well as the local Gs, but no transatlantics.

Latest sunspot predictions

The recent upsurge in sunspots has been a good sign that we are now strongly on the upward curve of cycle 24 at last: most days there are spots and the solar flux levels are climbing. However, this is in line with NOAA predictions and their latest table of expected sunspot numbers is unchanged, I think, with a peak smoothed sunspot number of 90 expected in  May 2013.

500kHz looking like 30m!

Just look at this WSPR screen from 500kHz at 2330z this evening. There are G, PA, LA and SM signals coming through pretty well. 500kHz is now getting quite busy at night and it's harder to find a clear spot in the 200Hz WSPR sub-band!

Google ads quirk

Since I mentioned the Flea QRP transceiver some of my banner ads have come up advertising Flea spray! As I've mentioned them again I expect they will remain until I use some other key words in my text.

Self assembling solar cells?

Interesting article on the BBC Technology page about a possible technique for "self assembling" solar cells and other electronics products. See http://newsvote.bbc.co.uk/1/hi/sci/tech/8452912.stm