Sal M. Onella wrote:
I have very few ideas for correcting the original sleeve design.

What are the resonant frequencies and feedpoint
resistances for the two types of feeds?

There's no rule that says the antenna must be
50 ohms at resonance. A 2.8:1 SWR could just be
an indication that the feedpoint impedance at
resonance is 18 + j0 ohms.

Did you do anything to choke the common-mode
currents on the feedline? If not, those currents
can upset the SWR meter reading.
--
73, Cecil, http://www.qsl.net/w5dxp

"Cecil Moore" wrote in message
.. .
Sal M. Onella wrote:
I have very few ideas for correcting the original sleeve design.

What are the resonant frequencies and feedpoint
resistances for the two types of feeds?

I will need to re-borrow my buddy and his analyzer. We just took readings
but no notes. (Yes, I know better.)

There's no rule that says the antenna must be
50 ohms at resonance. A 2.8:1 SWR could just be
an indication that the feedpoint impedance at
resonance is 18 + j0 ohms.

Agree. However, the venerable Kenwood TS-120 says to keep the VSWR under
1.5:1. So, my first attempt is a bad antenna for the intended purpose.

Did you do anything to choke the common-mode
currents on the feedline? If not, those currents
can upset the SWR meter reading.

No. That was careless of me. Four turns of the coax if I remember
correctly from an earlier discussion here. Thus, the first attempt may not
be a bad antenna but a bad measurement.