Tag Archive for QRP

WSPRing on 10m with W5OLF’s latest transmitter

wspr_axe

I managed to find time to assemble my 10m WSPR transmitter yesterday and put it on the air this evening. This is the 3rd version of such transmitters from Jay and it is significantly different than previous versions. For starters, it transmits 100% of the time and changes frequency semi-randomly from one 2-minute TX cycle…

CQWW 2014 – QRP & a battery take on the world

cqww_2014

. Well that was a whole lot of fun! I operated for a total of 5 hours and used a 1300 mAH battery to provide power to the KD1JV “Mountain Top Rig”. About 95% of my contacts were on 20m with the remainder being on 40m. Highlights: All continents worked 24 Zones worked 65 DX countries…

A battery-powered QRP CQWW (CW)

CQWW_station

Years ago, a dedicated QRPer set out to see if it was possible to accomplish WAS with a 9-volt battery. That QRPer was Larry WD3P and you can read about his results here. More recently, Fred KT5X posted the following about three recent SOTA activations: “I activated three peaks today with the ATS4, worked a total of 68 QSO’s,…

Portable SDR with built-in antenna analyzer

pSDR

As I read the web site and watch the embedded videos, I am of course interested in the technology described – but perhaps even more interesting is the age of the ham involved. We often hear about the “graying” of ham radio and I’ll be the first to agree with those who say that the hobby…

Why not a “smart” autotuner?

rxnb

Three decades ago, every issue of QST had an ad from Palomar Engineers with exactly two products being pushed – a VLF converter and a noise bridge. They looked quite similar in identically-sized bright red housings. I bought the VLF converted and had a lot of fun experimenting with it. As for the noise bridge –…