[sdiy] WTB/WTT: 709 op amps

[John Mahoney]

At 07:56 PM 6/27/2007, dj hohum wrote:

>Incidentally, the entire schematic for the 709 can be found in the
>datasheet with resistor values. I imagine almost any PNP/NPN smalll
>signal pairs will work then you could have the pimpest cracklebox on
>the planet because it would be DISCRETE!!!  After all, there are only
>14 transistors in the circuit. For double fun you could put the
>discrete 709 into one of those round mint tins and use something like
>#12 solid wire for the leads.

Interesting idea, I wonder if it'd work. It's one thing to *imagine* 
that something will work. It's another thing to find that the Vbe or 
some other aspect of the transistors is all wrong, although it would 
be nigh impossible to determine the actual problem. Still, it is an 
intriguing concept.

Yes, the humble mint tin: favorite of DIYers everywhere.
--
john


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