The Oak Hills research produces a very nice QRP power meter kit, the RF power meter WM-2 QRP is produced with a high-quality case and silkscreened and masked PCB and a large moving coil meter. Meter Highlights Operates from 300 kHz to 54 MHz Measured power range from 100 mW to 10W FSD with an […]
Category: Blog
Ultimate 3S QRSS/WSPR project (Part 1)
Welcome to Part 1, this covers the initial build of the U3S, Part 2 covers the addition of the LPF relay board. Some month ago I purchased a Ultimate 3S QRP transmitter from QRP Labs. The latest version is the ultimate 3S and it comes with a number of options. Over the christmas holidays I decided […]
RSGB Christmas Cumulative Contest
The RSGB have a series of Christmas Cumulative contests covering 50/70/144 and 433 MHz. The contest is a chance to put down that turkey sandwich and head out to play some radio in the winter sun. The contest run for 2 hrs, and activity is over 4 days. You can read the rules online, and […]
Decoding HF ACARS – ARINC 635 (HFDL)
NOTE:- It has been recently discussed on the UDXF Yahoo group that Sorcerer is using an old freq/site list – you may get correct decodes, but not correct site IDs. One option is to consider some of the other methods of decoding ARINC on this page. This article was updated on 28/11/17 to reflect some changes […]
High Altitude Balloon (HAB) tracking
Amateurs often launch HAB containing telemetry and sometimes SSTV of the ability to take and store pictures. The launch schedule is usually published online, its worth starting with this online resource. Tracking is based on an adapted version of FLdigi, this program once configured with your callsign and location will manage the upload to a […]
Icom 7100 VHF/UHF changed to N-Type socket
Icom 7100 rear sockets original configuration Icom 7100 have 2 antenna sockets, Ant 1 – HF, 50 and 70 MHz, Ant 2 – 144 and 430 MHz John M0UKD made this change and wrote about his experience. You can download a copy of the Icom 7100 user manual here. The most difficult part […]