When? - NOT amateur radio

There is a guided busway from Cambridge to St Ives which runs out along special tracks on the route of the old railway. The bus can travel fast and traffic free. It is a very good route past lakes.

We are looking forward to doing this again soon. 

Sunspots - Wednesday February 24th 2021

 Solar flux is 78 and the SSN 31. A=12 and K=3.

472kHz WSPR RX

At about 1930z, I turned on 472kHz WSPR RX using the earth-electrode "antenna" in the ground. So far, no spots. It is now 1952z. 

I notice the noise floor on 472kHz with the PC charger on was S8, whereas with the charger off it is S2. As WSPR bandwidth is only about 6Hz, I wonder what difference this makes? I am no theory man, so I do not know the answer.

UPDATE 2210z:  5 different stations spotted this evening with the furthermost LA8AV (1012km). I shall shortly be turning off the gear.

Cat problems - NOT amateur radio

Last night, my wife had a video chat with one of our grandchildren. During the chat his cat decided to jump to his mother's highest shelf with her most valuable pottery.  I think things ended without disaster. 

Walk - NOT amateur radio

We have just got back from a walk around Wicken Fen. Windy and sunny. 

ICOM - IC-705: still tempted

The price of this rig, like the IC-7300 and IC-9700, is not going to fall any time soon. 

Clearly, if you want one from a UK dealer in the next few years it is very unlikely that prices will fall. It is definitely my kind of radio, but I do not like the price.  I like the connectivity options and the GPS.

The feeling you are left with is that this radio is market priced. Prices will not drop if we are prepared to pay the current price. Clearly many are.

If I get a decent trade on my FT991A, I might be tempted...

Several dealers are selling them ex-stock now.

160m FT8 RX overnight with the earth-electrode "antenna" in the ground

After being spotted by 31 stations with my 2.5W 160m FT8 last evening, I was RX only on 160m FT8 overnight. Over 400 stations spotted (see map). Fewer than a few days ago, but still plenty.

I am amazed how well this "antenna" works on 160m and 80m QRP. Why go to all the trouble of a big eyesore antenna if something this simple works?  

I may give this setup a test on 80m SSB next Sunday in the CDARC net.

New windmill path - NOT amateur radio

In the last few days they have been making a new path to the local windmill and museum, as the photo shows. This is designed to make access better in all weathers. We live next door.

As of yesterday, they had put hardcore down. I am not sure what goes on top.

Sunspots - Tuesday February 23rd 2021

 Solar flux is 76 and the SSN 26. A=17 and K=3.

136kHz experiments

Before moving to the current QTH about 7.5 years ago, I did some tests on 136kHz QRSS. I used the E-field probe for 136kHz on a mag-mount on the car and drove around to see where the beacon could be copied. The beacon produced 8W into 50 ohms, but the beacon ERP was only low milliwatts or even less. The antenna was the earth-electrode "antenna" in the ground. After successfully receiving the beacon on the far side of Cambridge (20+ km?), I just stopped as it was obviously working well both on TX and RX. The E-field probe is shown in the photo.

Other than a brief test with the earth-electrode "antenna" on RX, I have never yet tried 136kHz at this QTH.

My old site (links may not work as this old site is not maintained) has a description of the E-field probe RX antenna and other tests at 136/7kHz.

See https://sites.google.com/site/g3xbmqrp/Home/136k .

See also http://g3xbm-qrp.blogspot.com/2013/01/137khz-e-field-probe-mag-mount.html for more on the LF EFP.