in radios, it uses a piece of mineral, like galena or in my case iron pyrite. Knobs: 1 large (3-4 inch) (FRS, AES), 4 "communications type" knobs (RS). Next we need a simple wooden base to hold our components. 3) Using a file on edge cut teeth into the ends of the strip of copper. Now we'll start making our connections! 3) Mount a small piece, about 1/4 of iron pyrite in the jaws of the detector and position the cats whisker so that it is touching the surface of the iron pyrite. C) Slide another washer over the screw and add a nut tightening it down so that the wiper turns with a some resistance so that it well not lose its setting when in use. We connected two 1 k resistors in parallel (to give us an input impedance of 500) from input to ground and measured the output impedance on Thoms Rig Expert AA-170 antenna analyzer. The first thing we did was check that I had wired it properly. End-fed, half-wave antennas (efhws) are a half-wavelength long and are resonant antennas on the band of interest.
The regenerative radio receiver or, even super-regenerative radio receiver or, "regen" if you prefer, are basically oscillating detector receivers. First, measure the voltage at the cathode. Then wire the output jack J1 (using a RS stereo jack, the 2 "hot" leads go to C14, common to ground). One front panel, 10" wide by 7" high. All materials are provided for free private and public use. He got great signal reports from an npota station, a special event station in Georgia, and an operator working aeronautical mobile over Nebraska. Slowly turn up the regeneration control until the detector oscillates, producing a "live" sound (a large increase in background noise).