Antennas
Probably the best DX site in the world
 DX news
Experiment with windings
of the secondary coil

The antenna input of my radio is fed from a secondary coil of 4 windings; I know one or two windings is sometimes recommended, but I use it with a tube radio whos input impedance should be higher than that of a transistorized set. After all the radio was designed with a longwire in mind.

Experiment! Try a one or two turn secondary. Sometimes you have to throw the textbook and theory out the window. The original design for my 1 metre loop called for a single secondary winding, twisted about the fourth turn of a seven turn primary winding. I tried various coupling methods and eventually opted for a single turn spaced 2 cm below the fourth primary winding. Signal level became considerably reduced, but null/peak increased. My Icom R71A countered the reduced signal level. May, 1995 (Author of advice unknown)

Front page
DX News
Logs
Andes DX
Antennas
DX Lab
In Print
Web Stories

 Archives
Web Archive
Mail Archive

 Search
Search all HCDX
mail since 1995

 About us
About us
Write to us

Copyrights
FAQ
HCDX mail list


antennX  Cebik  FM antennas  Werner's links  Antenna Elmer  Coax basics  DX-Tools.com