http://www.qsl.net/ve3rgw/uvdup.html

Note it it is referred to as a duplexer lol.

Not a bad deal since you have to replace the connectors on the stupid ones
you buy.

Looks like pretty good isolation too. Most off the shelf units are 45-60 db
isolation. Double shielded pigtails eliminates any worry of cross coupling
and the loss for one connector pair anyway. How does it do with 100w FM and
long QSOs? Seems like SM throughout would be called for.