I built it essentially the way WB2WIK describes it in his post, except I don't have a copper sleeve, just using the coax shield.

WA3WZR

Having a need for a 2 meter antenna and having some spare coax laying around, I decided to experiment and build a coax vertical.  I have the SWR at a reasonable level for 2m on both an Antenna analyzer and on an SWR meter (using my HT as a transmitter).

When I add coax to it, to about the length I would use when I mount it, the SWR goes off the scale.  I have tried various lengths of coax with the same result.

I'm puzzled.

Unfortunately that antenna is for 20-10.  I used this on 40 and 80 as well.

Looking for an old 73 Magazine article from the mid to late 70s.  This is a construction article for an antenna called the "Little Wonder", a limited space "tunable" (via antenna tuner) vertical antenna.  I had some success with this antenna and I wanted to try it again, unfortunately I can't find my copy of the article, so I don't know the specifics anymore.  Any help would be appreciated.