Auto Antenna Tuner with 2000 Memories Packaged For The Icom IC-705 ... HF / VHF / UHF Antenna Analyzer - 0.1 to 650 MHz ... AM / FM Stereo / Shortwave / Longwave ...
Build the tuner in an aluminum project box. Drill holes in the box to mount the various components. Leave plenty of room around the sides of the components to prevent RF arcing. Be sure to keep both sides of the variable inductor insulated from the box, you may need to use insulated bushings (non-conductive washers) on the inductor’s shaft.
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May 12, 2011 · For an antenna, making the loop antenna mounted on a flat board is pretty simple. For my Six Dial Device I drove brass furniture nails into a plywood board in the eight-armed star pattern, eight nails for each arm, and wound magnet wire around them in a spiral (wind a loop around each nail as you go).
This circuit is for a QRP (low power) antenna tuner, a.k.a. a transmatch, for use in the short wave amateur radio bands from 3-30 Mhz. It allows a wide variety of antennas to be connected to a low power transmitter.
Description. CG-3000 automatic antenna tuner (ATU) covers whole HF amateur bands. It uses multi-signal processing circuit to switch L/C to make perfect matching between your radio and antenna system. Fast tuning, less than 2 seconds for first initialize matching. 200 memory channels store the minimum SWR value to make further tuning.
Jun 15, 2017 · This simple little circuit can be used for AM, FM, and Shortwave. On the shortwave band this active antenna is comparable to a 20 to 30 foot wire antenna. Parts List: R1 = 1M C1 = 470pF C2 = 470pF L1 = 20uH to 470uH Q1 = MPF102, 2N4416, or NTE451 L1 can…
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