40M Loading Coil for AT-271 folding antenna.
Description
Update: Added Two Variations On The Coil For Someone Who Wants To Use It For A Screwdriver Antenna. It Should Measure Out To Be About 50Uh. It Has A Plain Interior Because I Believe That The Center Should Contain Supporting Structure Such As A Piece Of Abs Plumbing Pipe, Or A Wooden Dowel Epoxied In Place. The Bending Load On Something This Long Will Be Considerable, So Better Interior Support Will Definitely Be Required. Note: Updated. Removed Glue Together Assembly Instructions. If You Downloaded The Files Before Midnight On Monday May 29Th, You May Want To Re-Download The Files To Get The Newset Version. Please Read The Instructions Below For The Latest Assembly Instructions. This Is A Loading Coil For The Fold-Up Prc Antenna Pictured. This Antenna Is Very Lightweight, And When Horizontal, It Only Droops About 4 Inches. It Is 113.5 Inches Long (2.88M). The At-271 "Fishing Pole" Antenna Was Used On The Prc-25 And Prc-77 Squad Radios And Also On The Prc-104 Hf Radio. A Number Of Commercial Radios Also Use The At-271. See Http://Www.Prc68.Com/I/At271.Shtml For More Details. The Antenna, With All 7 Sections Extended, Operates At 25Mhz. This Loading Coil At 22Uh Should Bring The Operating Frequency Into The 40M Band (7Mhz). I Designed It To Be 25Uh Total, So You Can Easily Fine Tune It By Shorting Out A Few Coils With A Clip To One End.
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