On Thu, 30 Jun 2005 20:43:53 -0500, Tom Ring
wrote:

Richard Harrison wrote:

Yes. One of the baluns in the ARRL Antenna Book uses an extra180-degrees
of 75-ohm coax to drive an element in a 300-ohm balanced antenna from an
unbalanced 75-ohm aource.

Best regards, Richard Harrison, KB5WZI


A standard in the VHF and up world; it is used in the T-match.

Question - has anyone ever done any analysis or testing of what happens
to a T-match when run off the center frequency of the balun?

Your question is not clear. Are you asking about tee-match performance
or balun performance?

There has been an examination of the balun performance.

"The Half-Wave Balun: theory and application", J Nagle, K4KJ, ham
radio magazine, Sept 1980 pp 32-35