27 Jan 2023

Voltage dropping

In a few weeks' time (with a following wind) my QDX digital transceiver should arrive. With a 12v supply, there is a danger of the PA being badly over-rated and failing. Most of my gear runs from a 13.8V, so it would be prudent to run the QDX from a lower supply voltage.

My easiest solution is a string of suitably rated diodes in the supply. I have 10 off 3A silicon diodes that should be here next week. I could drop 6V with these if I want, making the QDX run safely from 9.8V.

Friday plans

 I think 10m QRP WSPR TX beckons. My 500mW beacon will be turned on shortly.

Fame? - NOT amateur radio


To my surprise, an email I wrote to the BBC regional programme "Look East" was read out on the programme last night. It was about our local bus service. 

In the past, a couple of my photos have been used on the local TV weather forecasts, but this was a total surprise.

23cm beacon hunting

Last night I went beacon hunting on 23cm with my tiny indoor 2 element beam. I monitored GB3DUN on Dunstable Downs for several minutes. This is probably my best chance of copying a 23cm beacon.

Just occasionally there was a very brief signal that may have been this beacon. It was there for (at most) a second, then was gone. The direct path is very obstructed and my only real hope is by aircraft scatter. The impression I got was this was not aircraft. I have no idea if you get MS on 23cm.

Other beacons I also looked out for on my waterfall, but nothing was seen.

Sunspots - Friday January 27th 2023

Solar flux is 151 and the SSN 104.   A=11 and K=1.

26 Jan 2023

Assembled QDX status?

 The status of the queue of assembled transceivers from QRP Labs has not been updated since late last week.

See http://qrp-labs.com/qcxmini/assembled.html .

Rally

 The following rally has been notified to me: -

Sunday January 29th - Lincoln Shortwave Club Winter Rally, Market Rasen, LN8 3HT. Contact m5zzz@outlook.com .

As always, it is worth checking before going a long way.

8m QRP FT8

My 8m FT8 on 40.680 MHz was turned on at 0952z.

UPDATE 1625z:  Just G0HVQ (181km) spotting my QRP and nobody spotted on 8m FT8 RX.

UPDATE 1925z:  QRT. No further spots.

10m 500mW WSPR TX (Thursday)

My QRP 10m WSPR beacon was turned on at 0952z.

UPDATE 1000z:  Just local G4KPX (14km) spotting me so far.


UPDATE 1610z: 
 17 stations spotting my QRP (see table).

UPDATE 1922z:   18 stations spotted me today. QRT soon.

10m FT8

 


With sunspots again good, 10m is again coming into its own. It is quite easy to copy stations on every continent in daylight now on 10m. More people are using FT8 now. This is a digital modulation that is even better than CW, handling and decoding very weak signals. It has already shown that the 10m band is "open" when many leave it.

If you are after a simple 10m FT8 RX that is effective and does not tie up "the big rig" how about my 10FT8R receiver? This is very simple and low cost, but works well.

See https://sites.google.com/view/g3xbm4/home/hf-mf-and-lf/homebrew/10ft8r-rx .