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This coil, on a grooved, PVC base, is used to tune an antenna to a lower frequency. It has taps at each winding for adjusting to the ideal inductance to minimize antenna SWR. I have installed one on my HY-Gain Hy-tower vertical. I normally adjust the antenna for the top end of 75 meters. The coil taps then lets me adjust the antenna at any lower frequency all the way down to 160 meters. These coils normally go for over 2 times the price. This 40 uH coil is normally rated at 200 watts. With soldered connections and relay switching, it is usable all the way up to 2000 watts PEP. It is approximately 15 inches long, 2 1/2 inches in diameter. Complete with stainless steel mounting hardware and galvanized eye bolt. Amateur Radio DataChart in small, 8 1/2" by 11" and large sizes, at 11" by 17" size. Printed on Heavy Photo Paper Stock & laminated. Hang it on the Hamshack wall to proudly display your rig as a work of art or use it as a place mat in front of the rig for instantaneous operational reference. SOME OF US NEED ALL THE VISUAL HELP WE CAN GET! The extra large DataCharts, while normally printed on one side, can be printed, BY REQUEST, on both sides for larger, easier to read print, (DOUBLE SIZE PRINT, no extra charge). Email me if 2 side printing is desired when ordering I am a retired electrical engineer, professor and Ham Radio operator since the early '50s as W7YEN. I have designed at the edge of state-of-the-art electronic systems. I found, not only the need but also the requirement to create specialized devices to enhance many systems including ham radio for extended use. These newest generation amateur systems are no exception. As a consequence I spend several hundred hours creating and testing devices that add operational ease to this fastinating hobby. Many of these same devices are available but at a very high price. My desire is to create these same devices to function the same way but at a much lower price. This help all of us enjoy a more affordable hobby. I also create DataCharts for many Transceivers and Handhelds. You wont find an airline pilot during take-off thumbing through a 200 page manual on "How to Fly Your 777 for Fun & Profit!"They have, of course, a DataChart! Hams shouldn't have to refer to multi-page manuals as amateur radios are nearly as complex! Having multiple DataCharts means never being without the quick information needed! Amateur Transceiver DataChart in a letter size, and large 11" by 17". Laminated and Printed on Heavy Paper Stock. Email me with any questions when ordering (Coil antenna 30MH amateur ham radio was posted and is owned by: Glenna Whitley) |
glenna.whitley@chicagopartsnetwork.com (Glenna Whitley) for more information.
