Pages

▼
23 May, 2019

50 MHz Doppler shift from planes

›
This is the first time I have observed Doppler shift in the 6 meter band. It is not so hard to see on the waterfall display of FT8. The ...
2 comments:
16 May, 2019

Morserino now supports Single Paddle Emulation

›
Picture credit Morserino-32 I was happy to see the other day that the nice-looking Morserino keyer with its modern display in its latest...
13 May, 2019

More spurs than I had hoped for

›
My Just good enough 10 MHz reference  based on the direct output of a Neo-7 GPS module, described in detail before on this blog, is good i...
02 May, 2019

Book rather than Blog

›
My blog has suffered in recent years and here is the reason. For three years now I have been writing a book entitled "Waves with Powe...
24 April, 2019

The Ultimate WSPR Spot - part 2

›
Being spotted by the designer of my WSPR transmitter must be the ultimate WSPR spot! Perhaps only surpassed by being spotted by the design...
12 April, 2018

Power regulator works as polarity protection

›
Step-down converter based on LM2596. Note the damaged chip Ok, now I've done the test. My QRPLabs U3S runs off a 12 Volt power supp...
04 March, 2018

Deteriorating ceramic filters due to DC

›
Tandberg Huldra 10 Tasos, SV8YM, has written about " The Mysterious Case of the Withering Filters ". This seems to affect not ...
1 comment:
27 December, 2017

QRSS experiments: FSKCW and Slow Hell

›
These last few days I've been experimenting with my QRPLabs Ultimate 2 and Ultimate 3s transmitting on 7 MHz. In addition to WSPR, the ...