[sdiy] Wiring pencil

[Andre Majorel]

[Not specific to synth-DIY but I think this might interest other
subscribers.]

My prototyping is normally done on single-sided vector board,
using 0.05 mm² wire wrap wire (PTFE or PVDF insulation). On short
connections (less than about 2 cm), stripping the wire is a pain.
I'm thinking about trying a wiring pencil.

If I understand it correctly,

- the insulation is polyurethane enamel,

- you don't strip the wire, the heat of the iron vapourises the
  enamel,

- you can (must ?) use little combs to order the wires.

Things that worry me :

- Do you have to use the combs ? They're for 1.02 mm holes and my
  vector board stock has smaller holes (around 0.8 mm).

- Once you have soldered one end and "drawn" the wire to the other
  end, what do you do ? You'd need three hands to hold the pencil,
  the iron and the solder. Do you cut the wire to length and hope
  it stays put ?

- The wire is awfully thin. 0.15 mm outer diameter including 0.012
  mm thick insulation = 0.0125 mm² ! Couldn't that cause problems
  for analogue synth-DIY ? The resistance is given at about 1 ohm/m
  so the average connection will be a few tens milliohms.

Thanks for any hints !

-- 
André Majorel <URL:http://www.teaser.fr/~amajorel/>
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