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24 January, 2016

Latest firmware for AP510 APRS tracker is superb

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I got my AP510 APRS tracker a little more than a year ago . It kind of worked, but not very well in my car. But after the tracker got a ...
13 January, 2016

Magnetospherically ducted echoes in the San Francisco area

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On 7. November 2015, several radio amateurs in northern California heard echoes in the 80 meter band. I was made aware of it by Jack, W6FB i...
11 December, 2015

Finally got rid of the pirated USB chips for the UV-5R and the AP510

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Both the Baofeng UV-5R handheld UHF/VHF radio and the Sainsonic AP510 APRS tracker come with interface cables with pirated chips. These a...
19 November, 2015

Curing amnesia in the 10 MHz GPS reference

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Just good enough 10 MHz GPS reference with u blox Neo-7M GPS module to the upper right, 10 MHz output buffer lower right, USB interface...
02 November, 2015

Radio Ghosts Have Haunted the Airwaves for Nearly a Century

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“The starship hypothesis is a very interesting one, and the one which seems to be the most popular one on the internet,” said Sverre Holm,...
15 October, 2015

Better with SMA

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I had some trouble closing the lid on the " Just good enough 10 MHz GPS reference " due to the size of the BNC jack. Therefore I...
03 October, 2015

Just good enough 10 MHz GPS reference

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Some time ago I noticed that the Ublox Neo-7M GPS has a 10 MHz output which is locked to the GPS system's accuracy. Most people kept s...
2 comments:
11 August, 2015

The LM386 Pixie challenge

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The Pixie 2 is this minimal transceiver which I and many others have played around with and had lots of fun with. My 80 m version is ...
1 comment: