Earth-electrode "antennas"

As you may know, I have had great success on VLF to beyond 160m with this structure. DK7FC has used such antennas down to ELF! A copy of my blog, which shows quite a bit about my experiments, is available as a .pdf. I think you have to join this Facebook group first, although the blog is also available here.

These experiments were at the old QTH, although I use this here too on 472kHz and 1.84MHz. At 137kHz it worked pretty well last year here. It has even been used on higher frequencies, although if my "loop" theory is correct it should be far less effective as the frequency is increased.

Sunspots - Friday March 1st 2019

Solar flux is 70 today and the SSN 0 still. A=26 and K=5.

10m FT8 RX

Not yet checked the solar conditions, but I am not expecting much on 10m today! Since breakfast time, I have been on 10m FT8 RX. As yet, no spots.

UPDATE 1122z: Absolutely no 10m FT8 RX spots here so far.

UPDATE 1435z: Just EA7KR (1804km) spotted today on 10m FT8 so far. Pretty dire!

UPDATE 1821z:  2E1RDX (139km) also spotted. Just 2 spots all day. 😕 Time to QSY to 1.84MHz.

SSTV on Oscar 100

Last night I got an e-mail from David G0LRD, who has been getting some good SSTV signals back from Oscar 100, the geosynchronous satellite. I reproduce his letter and photos here. Thank you David.

"Hi Roger

Here are a few images I captured from the satellite (80cm dish, GPS-locked LNB, SDRPlay).

The two test cards were analogue SSTV, the other two were digital SSTV  (KG-STC software, Info here: http://www.g0hwc.com/kg-stv-english.html) 

Feel free to re-use if you wish.

73 David G0LRD "

Rally on Sunday

Sunday 3 MARCH : EXETER RADIO & ELECTRONICS RALLY

America Hall, De la Rue Way, Pinhoe, Exeter EX4 8PW. Doors open at 10.30am (10.15am for disabled visitors). Admission £2 (under 16s free). There will be trade stands, Bring & Buy (book in from 10.15am), and catering will be available. Details from Pete, G3ZVI on 07714 198374 or g3zvi@yahoo.co.uk.

A list of rallies can be found at http://rsgb.org/main/news/rallies/

Still on 2m FT8 RX

Overnight and this morning, I am still on 2m FT8 RX with the best DX this morning being DG2BCP (597km) on RX. So far today, 19 stations in 7 countries already spotted on 2m FT8 with the big-wheel omni antenna.

UPDATE 1800z: 47 stations spotted today on 2m with best DX DK1FG (815km).

Sunspots - Thursday February 28th 2019

Unless I am mistaken, this was a spotless month. Solar flux is 70 and the SSN still zero. A=10 and K=2.

I shall be interested to see the latest predictions for solar minimum. To me, it looks like we are just bouncing along the minimum, so it will be interesting to read what the experts think.

Return to 2m FT8

A brief CQ (2.5W to the big wheel omni) on 2m FT8 got 7 spots with best being by G7RAU (461km) in Cornwall and I have spotted 13 stations already with best DX DL6BF (479km). 2m FT8 really is amazing. Every time I try this I get spotted a long way away and I spot amazing DX. Much of this is tropo and not aircraft.

New QRP mag online

The latest edition of Vestnik is now available as a .pdf download.

See http://club72.su/vestnik/qv19.pdf

472kHz JT9 and FT8 frequencies?

Ok, so I am asking for some advice.

On 472kHz I mainly use WSPR, but wonder if there is a better mode now more widely used? If so, what dial frequency should I set?

UPDATE 1657z: In the absence of data I am currently calling CQ about 500Hz below the WSPR sub-band on 472kHz FT8. Nothing spotted yet.

UPDATE 1725z: As I have not heard about FT8 and JT9 frequencies, I have returned to 472kHz WSPR. G1GKN (99km) is a good signal, as always.