Date   : Fri, 13 Feb 2004 19:13:46 +0000
From   : "Nick B." <nick@...>
Subject: Re: Teletext adapters and VHF?

On Wed, 11 Feb 2004 20:54:18 +0000, "W.Scholten" <whs@...> said:
> Does anyone know if the Morley and/or Acorn TT adapters can be easily
> modified for VHF reception? I want to get teletext from channels on
> cable that are placed around 200MHz. The morley can be set to any value
> with the support ROM but it doesn't seem to detect anything below ca.
> 450MHz (and the ATS3.10 ROM starts at a too high channel, can't seem to
> change that)

If you can get a dual-band VHF-UHF tuner then it should theoretically be
possible to substitute it for the single-band UHF version. ISTR the only
additional control you would need would be a band-switching control
voltage as the varicap tuning voltage would be identical (0-30v) and the
intermediate frequency output should be the same.
I suspect the tuners in them are Phillips (or Mullard if really old!).
The tuner part number begins with a U + three or four digits so if you
can post that here maybe someone can suggest an equivalent.
-- 
Nick B.