Requesting a circuit to remove DC from video signal

[Aussie Bloke]

G'day all.

I notice that a lot of older video equipment particularly cameras from the 70s seem to output video with a certain level of DC voltage. As a result I have zapped two of my AV inputs of my Panasonic DVD recorder some months ago. Now I have been trawling the web for a simple passive video DC blocker circuit schematic but haven't found any, though have found a couple of video DC blockers for sale:
http://www.extronelectronics.com/pro...subtype=61&s=4
http://www.cs1.net/products/audio_authority/1182.htm

As I couldn't be bothered trying to order these internationally I have decided to try and make my own passive DC blocker circuit even though I don't know exactly how to make one. I put a 0.1uf capacitor in series and 75 ohm resistor in parallel and tested it out. It successfully removed the DC offset from the video signal, however the picture is not completely stable and it warps and bends as the picture gets brighter.

Anyways I was wondering if anyone here can provide me with a schematic of a passive video DC blocker that can produce a nice stable picture? Any help will be much appreciated.