Check from the coax connector to each side. I just did this with a Spi-Ro
160 I have been using.
Center to the end of one side was a complete closed circuit. The other side
shield to end was open. From the connector to the coil was closed but nada
on the other side of the coil. So in my case the coil is bad.

To start all you need to test is from the coax connector to each side just
beyond the center connector/balun. W9INN used a 1 to 1 balun
along with a connector. You can used a budwing
center connector then add the balun (2 pieces).
I would suspect the balun first then the center connector. If that antenna
has traps check them also if everything is Ok in the center.

Good luck.

73 Dave K4JRB
"Dick" wrote in message
...
I have an old W9INN (SK) 40/80 Dipole that has worked
great; however, I suspect the balan or center feed may be
open inside. I would like to know how to test it or how to
obtain a replacement.

Anyone know of a source of replacement parts for W9INN
antennas?

aa5vu