Hendricks QRP Kits
Affordable QRP kits at exceptional value
Hendricks 40m - 15m SOTA Halfwave Tuner
Packaged by Ken Lo Casale. WA4MNT
Whenever I go to the various QRP forums, I listen to what people want and would like to see as an interesting and useful kit. This year at the AZscQRPions 2011 Ft. Tuthill gathering in Flagstaff, AZ, was no exception. With the advent of the SOTA (Summits on the Air) program that is becoming popular, I thought it would be nice to have a low cost, miniature, rugged, ultra-light, halfwave tuner for 40m-15m or for the 80m band that would be the basis of an antenna system, with just the addition from the user, of some lightweight inexpensive wire. The SOTA tuner can be either built for 40-15 or 80. The product we developed is enclosed in a sturdy aluminum case, and features Dan Tayloe's (N7VE) led swr indicator, with all stainless steel connection hardware. We are rating the tuner at 5 watts CW, 10 watts P.E.P. The light weight and small size make this tuner ideal for the backpacker and because it is so small, you won't even notice it in your luggage as you travel. This tuner is perfect for the people who like to take a small rig with them when they travel on business for hotel operation. Plus, the Tayloe SWR indicator eliminates the need for additional SWR bridge, and associated cables. All that you have to do is attach the tuner to a wire, hook it to your rig, and then tune until the LED dims or goes out. When that happens you are ready to operate. It doesn't get any simpler. The SOTA tuner is perfect for the backpacker and traveler. It is small in size, simple to operate, and easy to build.
The finished tuner is just 2"x 2 1/4"x 7/8", and the weight is 2.54 oz., or (72 grams) !!
SOTA Assembly Manual (3/17/13 update)
SOTA Assembly Manual for 80m (1/17/13 update)
You may use our Order page to order the Hendricks 40m - 15m SOTA Halfwave Tuner by mail using check or money order. or
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