Date   : Tue, 05 Feb 2008 20:32:36 +0000
From   : zeem.uk@... (Alex Taylor)
Subject: Teletext interface, sans box

On 05/02/2008, Jules Richardson <julesrichardsonuk@...> wrote:


> I'm pretty sure that the single one at Bletchley is in a mess, with one of the
> ICs damaged and also missing one of the SAA ICs; it'd be nice to get an
> operational one.  I know at one point I was on the verge of asking the list if
> anyone had the remains of a teletext adapter that I could use to merge into a
> single good unit - but I didn't bother as I figured there was no chance
of that!

I've got a complete one that doesn't seem to work. When I first got
it, something was shorting out the +12V rail, causing the power supply
to overheat and smoke. I traced that to some shorted tantalum
capacitors (some I replaced and some have just been removed). Now the
unit seems to get detected, but I can't get the *TUNE meter to show
any signal level. Unless of course I'm doing something wrong - the
'aerial' was just a bit of wire poked into the socket, but I'd have
thought I'd have got some activity of some kind from the tuning meter.

Yours for the postage cost if you want it.

-- 
Alex Taylor