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in length connected instead of the vertical antenna Wire antennas should be insulated and supported off the ground as high as you can place them The performance of a wire antenna improves the more you can get it in the clear and the more vertically it can be positioned If you do use a wire antenna, you may have to reduce the value of the input resistor R1 for best results The whistler receiver also needs a ground connection, also called a counterpoise A simple but often effective ground can be provided by your body in contact with the ground terminal (BP2) I have used an improvised finger ring attached to a wire connected to the ground terminal Other places to make a ground connection include car bodies, wire fences, or other large metal objects not connected in any way to an AC power circuit Another approach is to use short sections of copper tubing as ground stakes which can be driven into the ground and connected to your receiver Try several different grounding schemes to see which one provides the quietest reception Don t be too surprised, however, to discover that you wind up having to still make body contact with the ground terminal for quietest reception! The prototype receiver, with a whip antenna, was mounted on a piece of wood approximately 2 60 You can install the antenna at one end of the long rectangular piece of wood (it can be mounted on a bracket or just taped on) and the receiver can be mounted at the other end of the piece of wood, about one foot down from the antenna using duct tape, twosided foam tape or a mounting bracket A length of wire was run from the receiver s ground terminal down the wood and taped in place at several places Now I had a handy walking stick that was easy to carry and use! The base can be stuck into any convenient hole, jammed into a rock pile, clamped onto a fence or vehicle, or even held by hand For the best chance of hearing whistlers and related phenomena, you will have to put some distance between the whistler receiver and the AC power grid The bare minimum distance is about one quarter mile from any AC power line; the more distance you can put between the receiver and AC power lines, the better You ll need to do some exploration to discover quiet sites near you Once you arrive at a potential listening site, set up your receiver, put in a ground connection, and see what happens What you will hear depends to some extent.

The whistler receiver works best out doors in open areas, with a vertical antenna of roughly 3 to 12 feet in height It can also be used in wooded or obstructed areas with wire antennas between roughly 50 to 200 feet

on the time of day, but you can always expect some sharp, crackling static The intensity and volume of this static will depend on propagation conditions and where thunderstorms are in relation to your location Chances are that you ll also hear some power line hum, but hopefully it won t be very loud If your listening site is too noisy, you need to try another listening site If your ears have good high frequency response, you will probably hear a continuing sequence of one-second tones These are from the OMEGA radio-navigation system OMEGA is transmitted from 10 to 14 kHz, and OMEGA transmitters are very powerful You may also hear anything that can produce an electrostatic discharge, particularly if the humidity is low These miscellaneous noise sources can include wind noise, the buzz of insects flying near the antenna, dry leaves or grass moving, and even the electrostatic charges that build up on your clothing Passing vehicles will often produce noise from