LinkBack Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
  #5   Report Post  
Old July 20th 11, 04:27 AM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Jul 2011
Posts: 117
Default Best Self Supporting Vertical Multi-band Antenna for Restricted Neighborhoods


"Richard Clark" wrote in message

Google for "Sleeve Dipole" (a vertical) which consists of staged
tubing, the upper element insulated from the lower. Do not connect
the lower element to ground. Thread the driveline coax up inside the
lower element and connect the shield to the top inside of the lower
element. Connect the coax inner lead to the bottom of the upper
element.

As I said, google for images as this description may frustrate you.

Invest the rest of your money (after buying sufficient quantity of
tubing) in your tuner. You may still have a lot left over.

73's
Richard Clark, KB7QHC


One of these for 10m was the first HF antenna I ever built. I wish I had
known then about decoupling the feed line, as I never could get repeatable
VSWR data, possibly due to common mode current. Maybe I'll rebuild it and
try again with a suitable choke.

I read about the sleeve dipole before I built it and I will pass on a
caution: The end where the cable comes out is a high voltage point
(expected for the ends of dipoles); higher powers may punch through the coax
outer jacket to the coax shield. I use a piece of PVC plumbing pipe as
additional separation inside the lower element and never had an issue.

"Sal"

Happy building.






 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Mono Vertical to Multi-band Scott Gordon Antenna 2 April 5th 06 08:42 PM
SLINKY - Multi-Band "Off-Center" Vertical Dipole Antenna for Shortwave Listening RC Shortwave 4 November 1st 05 05:36 AM
SLINKY - Multi-Band "Off-Center" Vertical Dipole Antenna for Shortwave Listening RC Shortwave 0 October 28th 05 11:37 PM
Multi Band HF Vertical Lushy Homebrew 2 October 1st 03 12:35 AM
Multi Band HF Vertical Lushy Homebrew 0 September 30th 03 11:30 PM


All times are GMT +1. The time now is 11:05 AM.

Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 RadioBanter.
The comments are property of their posters.
 

About Us

"It's about Radio"

 

Copyright © 2017