Re: Multinorm TV woes - no NTSC color display

[heuser.marcus@freenet.de]

David Wilson wrote:
> heuser.marcus@freenet.de wrote:
> > Only taking a crystal from a real NTSC IIe board did work.
>
> It would have been interesting to hook a DFM (digital frequency meter)
> to the 14M signal line and see what exactly the frequency was.

If you want to test the crystal(s), I could dig in the cellar and send
them to you. I guess they would survive a transport via letter ;-)

> Could the problem be related to
> http://en.wikipedia.org/wiki/Crystal_oscillator#Series_or_parallel_resonance
> (although 30MHz is listed as the typical transition between the two
> modes)?

I really don't know - I always thought that the frequency of the
crystal is pretty much the only important criterion (except the
physical type of casing, of course).

bye
Marcus