HF MOBILE CW even QRP by Petr, OK1RP

Inspired by Mark W4CK, Chris K4EFZ and Del W8KJP I am sending also some experiences with HF Mobile CW operation.

Since May 2002 when I bought my new toy MX-21S CW/SSB 2W QRP tcvr from Mizuho I have been experimenting with HF CW from my car even QRP power. I am living in Kostice, small village about 45 miles away from Praha where I am working in MIRACLE Network Ltd. as an Export Sales Mgr. of the micorwave links. Cause I am driving daily two times this distance so I am spending each day aproximately 2hrs on the way in the car. As Mark, W4CK said I now spending rather productively on the bands!

The rig I use is a Mizuho MX-21S tcvr for 15m CW/SSB with 2W output max. where builded inside VXO, RIDE, TO, 4 crystals IF filter all in handy size including the battery if need it. There is no problem to charging batts with the circuits inside also. I am using the DC-DC adapter connected to the main battery in the car and fused of course.

The second rig I use is an amazing SW-20 from Small Wonder Labs by Dave, K1SWL. This famous rig I builded from original company kit. Works as the monoband superheterodyne on 20m, 3 crystals on 9MHz IF, uses NE602 IC on mixer stage with tuned bandpass front-end. Power I have adjusted to 1W output only cause of battery consumption when I am using it for backpacking, but PA is able to manage 3W out. ( many thanks for all modifications emailed by Fraser, G4BJM! )

The antennas are simply home made vertical mobile whipes mounted on magnetic base in centre of the roof. Mainly I am using aprox. 1.5 to 1.8m long whipes originaly used for CB and matched inside the car by manual tuner and SWR meter checked. Well I know that it is not electricaly ideal solution, Well I know that it is not electricaly ideal solution. Well I know that it is not electricaly ideal solution. Well I know that it is not electricaly ideal solution.

Well I know that it is not electricaly ideal solution. Well I know that it is not electricaly ideal solution. Well I know that it is not electricaly ideal solution. Well main problem was too small power which not exceeded 1.5W output all the time. Well main problem was too small power which not exceeded 1.5W output all the time. Well main problem was too small power which not exceeded 1.5W output all the time, Well main problem was too small power which not exceeded 1.5W output all the time.

Well main problem was too small power which not exceeded 1.5W output all the time 2003 Well main problem was too small power which not exceeded 1.5W output all the time 2002. Well main problem was too small power which not exceeded 1.5W output all the time. Well main problem was too small power which not exceeded 1.5W output all the time. Well main problem was too small power which not exceeded 1.5W output all the time, Well main problem was too small power which not exceeded 1.5W output all the time…You can be with Your best friends by means of radio and You will spend this time much better and productively than phones talking stuff and nonsense…

73 of Petr, OK1RP/m