The President Lincoln is a popular 11/10-meter radio. From the circuit diagram, we can see that it uses a crystal filter at 10.695 MHz for SSB and CW. Although the…
Tag: SDR
SDR (Software-defined radio) is a transceiver technology where signal filtering and processing are handled by software.
OM0A SCC RTTY Championship
The SCC RTTY Championship is similar to the European HF Championship (EUHFC). The difference, of course, is that this contest is conducted using digital mode, lasts 24 hours, and involves…
The Story of the 2013 CQ WPX SSB Contest
I’ve entered every CQ WPX SSB contest in a multi-category, which has its advantages but also its disadvantages. Several new features were on the horizon for the contest, and I…
HA DX Contest 2013
Last year, I placed second in the HA DX Contest in the SOSB 80m HP category, so this year there’s still room for improvement. It takes place on January 19–20,…
CQWW Contest in the XTREME Category
The introduction of the XTREME category by the organizers of the CQWW Contest is an innovative move that allows amateur radio operators to use contest technologies that are prohibited in…