Increasing Distance of Coaxial Signal

I have 13 televisions setup in a daisy chain over three coaxial cables
(4,4,3). Currently I use them to display a powerpoint presentation from

a computer. The setup is sending the VGA signal to a converter box ->
Booster (Amplifier) -> VCR (convert to coax) -> Splitter -> In-line
boosters. I have also installed amps at each television in the daisy
chain to boost the siganl. The average distance between the source and
the first television is approx. 200' and 150' to each additional
television. I am getting signal but it creates a ghosting stiuation on

Martin Heffels...

Ghosting usually happens if you have a mismatch between cables. TV is 75
ohms, so make sure you use 75ohm coax. I think computer-cable is something
like 93 ohms, so that won't do.
The best solution would be to have a box which amplifies the siganl to a
couple of volts, and at the tv another box, which attenuates it back to 1
volt again. That way you can run a long distance.

many of the screens. Does anyone have another suggestion to improve the

signal? Considering the distance cost and amount of coax already
installed I would prefer not to replace the lines unless I have no
alternative.

I have found BNC Snap-in Balum that uses CAT5 to send the signal and
convert it on each end back to BNC. Has anyone used this type of
system? How well does it work? Any pros / cons?

Thanks in advance for suggestions