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Re: Oscar 11 demodulator



Sil PA3HIL <pa3hil@AMSAT.Org> wrote:

>I built mine from a Texas Instruments IC TCM 3105 and a
>Simpex 232A.
>I don't think the 3105 is manufactured anymore, and I
>savaged mind from an old 1200 b/s modem...You could also
>use a 7910, althought that's probably not made anymore either.

Both chips are long gone. TCM3105 is completely
unobtainable, and has been so for years.

Options: MX614 et al, G3RUH's decoder from 'way back
when (minor parts substitutions needed), or join the
21st century and do it in software.

Laura Halliday VE7LDH     "Que les nuages soient notre
Grid: CN89mg                     pied a terre..."
ICBM: 49 15.042 N 122 59.053 W       - Hospital/Shafte

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