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Subject: RE: [chromapolaris] Re: Do any Polarises have unsocketed ICs?

From: "Paul D. DeRocco" <pderocco@...>
Date: 2012-08-29

> From: wjmwpg
>
> I've been searching the list-posts to see if this output
> board ever came to fruition but haven't found anything . . .
> did this ever happen?

My friend has built one replacement output board, and it works nicely, but
hasn't done a production run yet. I'll try to light a fire under him. I have
four Polarises that would make nice homes for his boards.

> Alternatively, are there other suggestions to mod the output
> board besides dropping a TL074 in place of the LM348?

That probably wouldn't make a whole lot of difference. The real problems are
computer noise on the grounds and power supplies, digital noise coming in
through the error squawk line, and pseudo-random noise coupling from the
digital noise generator line into the output summing busses.

--

Ciao, Paul D. DeRocco
Paul mailto:pderocco@...