Disc analyser news update

[Tony Duell]

> 
> #40 is really, really thin (<0.08 mm, ~0.003in), only likely to be used for
> winding coils.

And darn hard to find in sensible quantities...

> 
> I was rewinding a coil with #38 a couple weeks ago, not much latitude for
> indelicate slip-ups.
> 

I rewound a couple of motors useing 38swg wire (5 thou, 0.15mm or 
thereabouts) a month or two ago. It was a lot easier than I expected, 
even though I got the connections to the commutator wrong the first time 
and had to wind that armature again.

Actually, this was on-topic. The motors were from an HP9125A plotter, 
which is used with the HP9100 calculator. The HP9125 is all discrete 
transsitors (mostly bipolar, but a few JFETs), there are almost 100 
transistors on each DAC board.

-tony