Date   : Thu, 26 Nov 2009 22:57:37 +0000
From   : philpem@... (Philip Pemberton)
Subject: Teletext receiver revisited

Rick Murray wrote:
> Could you peek inside one of each and see if whatever makes this change 
> is something you can change? It might be a simple band-pass filter or 
> something along those lines?

It's probably a SAW filter or something along those lines. In any case, 
the IF (intermediate frequency) is higher on the NTSC version; you'd 
have to reduce the IF, and replace the filter. Probably easier to just 
buy the right tuner in the first place...

-- 
Phil.
philpem@...          
http://www.philpem.me.uk/