Transistor matching circuit, revisited

[The Old Crow]

  I moved the corrected circuit schematic:

  http://www.oldcrows.net/~oldcrow/synth/misc/matching.gif

>  I'll put a postscript file of simple PCB artwork I made shortly.  Uses
>a 1458 and has both NPN and PNP 'sides'.

  Which I have now done.  Sufficient interest in etched PC boards might
result in my making a small batch.  About $5 per blank board given 25
pieces.

http://www.oldcrows.net/~oldcrow/synth/misc/mtchrbot.eps
http://www.oldcrows.net/~oldcrow/synth/misc/mtchrslk.eps

'bot' is the board trace image.  Note that it is NOT 'mirrored'.
'slk' is the silkscreen legend.  Shows all parts locations.

  The test socket is a turned-pin type (8 pins).  Use a small, adjustable
bipolar bench supply to operate the circuit.

Crow

/**/