Best way to feed in composite or s-video luma to a B&W Tube set?

[VintagePC]

Originally Posted by Chip Chester

If your set has external antenna screw terminals, a simple 75-300 ohm adapter will get you in. You may need an RF attenuator if the RF modulator you choose has high output, and your tuner is really sensitive... You'll have to experiment.

In theory, you could place a transmit antenna inches away from your receive antenna... but I've never done it.

Chip

I do indeed have two of those adapters on hand.

Browsing DX, I found this which looks like a 2 in one:
http://dx.com/p/gecen-gc-av04-househ...-silver-231907


Can anyone comment on that? I know it's 230V but I've got a eurotransformer kicking around here somewhere.

Edit: I guess what I'm looking for is something that can be used as a broadcast modulator to serve multiple TVs, but if that can't be had for a cheap price a $10 bay jobbie will do.

Do I need to worry about NTSC/PAL, or do most modulators do the RF bit regardless of the input signal type?