Active Ferrite Loop Aerial
Approx construction cost US$56
Large loop or frame aerials were a common part of the 1920s domestic radio scene, but their popularity waned during the thirties when an external wire became the normal means of signal pick-up.
A decade later, improved receiver sensitivity made it possible for small loops to be enclosed within the cabinets of portable and table sets. At the close of the fifties, in the twilight of the valve era, very high permeability ferrites were introduced. Rod-like cores of this material enable a tiny coil to pick up signals better than a small, air-cored loop, and ferrite aerials are now found in most domestic receivers.
This project describes a very compact loop aerial, which will provide an aid to better reception.
More details on this construction project can be found in the September 2000 issue of EPE Online, the world's first web-delivered electronics and computing hobbyist magazine.
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