DIY: Geiger Counter Kit

Description: Commercial Geiger counters can cost hundreds of dollars. With this Geiger Counter Kit you can build your own at a fraction of the price! This easy to solder kit can be built in an evening and it works just like you think it would; clicking and blinking in the presence of radiation. Is grandma’s…

DIY: SDHC Card reader problem in APPLE MAC computers

The problem has long time existed and discussed on APPLE Forum (Since mid 2010). However APPLE not yet react on many complains from their costumers. Problem description: The SD card reader slot on iMac/MBP has stopped picking up the SDHC cards. When insert a card, it fails to mount. This used to work fine, and…

DIY: Fractal Antenna for Digital TV

Spotted in the MAKE Flickr Pool, this homemade fractal antenna for digital television signals by Roy Jacobsen of Fargo, ND. Instructions for, and discussions of, similar designs are available in this Instructable from William Ruckman. Judging from the comments over there, folks who have built their own fractal antennae are quite pleased with how they…

KN-Q7A Single Band SSB Transceiver Kit

The KN-Q7A single band SSB transceiver kit was designed specifically for the worldwide market by BA6BF, and kitted by BD6CR/4. As the upgraded version of the popular KN-Q7 (more than 500 kits were sold worldwide), the KN-Q7A has an improved circuit design and component selection, which makes it an ideal candidate for field operation, back…

OK0EF 30m CW QRPp Beacon

30m SWL Report Date: 29 Nov 2011 Time: 14:30 GMT QRG: 10134 KHz QTH: Czech Republic / Europe. Basic Power:  500 mw QRK: RST in NW of Germany is 579 200 mw QRK: RST 559 100 mw QRK: RST 539 Power is changing in three steps (500, 200 and 100 mW). Beacon working with two…