This is my first post in the QRP section of this site and it will be brief so hopefully pictures really are worth a 1000 words (pics courtesy of Dr. Fred Harris, N5VDQ).
Pedestrian mobile (/PM) is the act of hiking around while actively making QSO’s from a self contained system. That may be easy at VHF and UHF but gets a little more complicated at HF. The operator is literally a “one-man band”.
Battery pack and feed point for John’s system is shown above. The antenna is a helically-wound vertical on a fiber glass fishing pole and fed with a 9:1 end fed transformer. The windings equate to almost a half wavelength of wire on 17 meters and works very well on 10-12-15-17 and 20 meters.. This design was chosen to avoid the need for a traditional drag counterpoise wire, however, a secondary feed point is included for 30 and 40 meters, which would represent a low impedance and require a counterpoise. This secondary feed point has not been thoroughly evaluated at this time.
Here I am working someone. I worked several stations by calling CQ near the traditional QRP CW frequencies on 12 and 15 meters. Several QSOs were QRP to QRP with stations in the north-east. All were solid QSO’s. Our party hiked about 3 miles that day and while we got a lot weird looks, we all concede that this is not a hot look, but it sure was fun. After spending 25 years in the shack running mostly QRO, this was a really great experience and I look forward to doing it a lot more… Kayak mobile (/KM) is in my future.