A few months ago, there was a discussion about RF A/B switches.
I came across the following, which be of interest for those wanting to
obtain such things (at least in the USA).
From what I can see, Yourbroadbandstore sells direct to the general
public.
http://www.yourbroadbandstore.com/category.php?cat=ME
The specs are on the manufacturer's website.
http://www.qintar.com/html/tv/tab.htm
Note that these are intended for receive-only, although I dare say you
could but a few watts of RF through them. The effects of them being 75
ohm units will be negligible.
--
Ian