WA4SZE wrote:
"I have shunt fed a 120 foot high Rohn 25G tower."

The Rohn has a 1-ft face, so the h/d is about 120. That`s OK. What`s
wacko is a 23-degree tower over (8) 200-ft radials at 529 KHz. Ground
connection resistance is high and eating up all the signal.

Shunt - feeding is OK. Bill Orr and Stu Cowan give feed capacitors for
scalimg in "All About Vertical Antennas".

Brown, Lewis and Epstein would be disappointed with your radials. Shoot
for the broadcast practice of (120) evenly distributed around from the
tower base.

A short tower radiates almost as well as a 1/4-wave. but it has a very
low radiation resistance so can`t tolerate any loss resistance.

Kraus gives advice for Electrically Small Antennas in the 3rd edition of
"Antennas". Page 710 says:
"To increase the radiation efficiency requires an increase in the
radiation resistance Rr or a decrease in the loss resistance Rl or both.

The SWR of a dummy load usually looks fine, but radiation is just
incidental.

Best regards, Richard Harrison, KB5WZI