Need Help with RF Modulator

[dog_cow@macgui.com (D Finnigan)]

I have a ROM 255 Apple IIc and the Apple RF modulator that goes with it. I
also have a black & white Zenith television with analog tuners. The IIc
composite out works, as I have tested it on a different TV. The RF modulator
connects with a composite cable to the IIc, then attaches with two wires to
the antenna terminals on the back of the television.

However, I was not having any luck in getting a good picture. The television
has both UHF and VHF antenna terminals. To which set should I attach the
modulator? Secondly, on which channel will the video screen appear? I tried
many combinations, and was able to get a really distorted video image on
screen. I could just make out the "Check Disk Drive" message. So something
is working, but not well enough. It might even be that this television has a
broken component somewhere.

Any ideas?

-- 
]DF$
Mac GUI Vault - A source for retro Apple II and
Macintosh computing.
http://macgui.com/vault/