Have a look in the back of a copy of Practical Wireless, there's a company
that advertises custom-cut xtals (well I assume they still do). Chances
they'll have one ex-stock.

IIRC the PAL burst is 4.43MHz so 13.875 isn't related to it, but it is a
multiple (888)of the line rate. You might want to try your local TV repair
shop or even the local refuse tip to see if one can be salvaged from a junk
teletext TV.

Regards
Nick

> -----Original Message-----
> I'm looking for a 13.875 MHz crystal for my teletext project. I've tried
> maplin, farnell and RS and none of them seem to stock it. I
> _know_ they are
> available somewhere because I've seen them in the past in some old Dragon/
> Tandy TRS 80 computers for video generation -I think they are a
> multiple of
> the colour burst frequency or something- but I dont really want
> to dismantle
> some antiques just to get my part. I've looked at digikey and they have
> something close which I assume is the NTSC equivalent of the PAL
> 13.875, but
> its not close enough. Does anyone know of another UK supplier that might
> stock this part?
>
> Jon Baker
>
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>

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