Check out these Antenna tuner images:
L1080250
Image by Nite_Owl
40M CW “Go kit”.. beta 1
Image by AA7JC
Transceiver (built into an altoids tin)
Iambic Paddle glued to bottom of rig (built from foam sleeping pad & touch circuit)
SWR meter (built inside antenna storage spool)
Antenna Tuner (built inside antenna storage spool)
66 ft end fed 40M Dipole Anterna
Earphones
Batteries
Pen
Coax
paper
utility string
Ok, this is just a concept, I just wanted to show how the Arduino could be useful for radio amateurs. The SWR meter (in the back) is hooked up to the Arduino, also a servo is attached which drives a capacitor. This capacitor forms a simple L-tuner, together with an inductor which you can’t see on this video. The Arduino does a full sweep on the capacitor while measuring the SWR. It stores the position with the lowest SWR and after the sweep it rotates the capacitor to that position. Mind the SWR meter (right needle) while the capacitor is rotating! Details, pictures, schema and code: ernest.utreg.net
www.hamradiofinds.com Here is a video showing the JW MIller AT-2500 HF Ham Radio Automatic Antenna Tuner..This tuner covers 80-10 meters & will handle 2Kw+ of power..It has one input & 5 outputs, including one long wire connection..It runs on 110VAC, but can be switched to run on 220VAC..The tank circuit is well constucted using heavy duty parts..This would make a great addition to any HF ham radio shack..Thanks for watching..73s, Mel, WA5UTK
Video Rating: 4 / 5