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Subject:
From:
"Martin G. McCormick" <[log in to unmask]>
Reply To:
For blind ham radio operators <[log in to unmask]>
Date:
Fri, 17 Apr 2015 07:55:34 -0500
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	What sort of circuit are you having trouble soldering?

	The only things I can't do anything with are
surface-mounted IC's. For regular through-hole stuff, I use
purph board and wire-wrap sockets for the connections to the
chips and then solder the wire-wrap leads to component leads a
short distance away from the sockets.

	You don't want to just wire-wrap to the components
because the component leads are usually round wires and the
wire-wrap will eventually shake loose. The trick is to wire-wrap
the wire around the round lead and then solder that to keep it
stuck tight.

	I also have occasionally used regular non-wire-wrap
sockets and been able to solder wire-wrap wire to the pins, but
this is a royal pain and nearly past the limits of my
capabilities. I am sure somebody on this list can do that but
not me very well.

	The soldering iron I use is a Wahl cordless miniature
soldering gun. It heats up very fast when fully charged and the
tip is very thin. Also small-gauge solder is best unless you
want to flood the space between the pins and then try to clean
up that mess. I speak from bitter experience.

	For anybody interested, wire-wrap wire is 30 gauge and
you need to use a good wire wrap tool or it's worse than
nothing. Also, since wire-wrap wire is solid and very thin, you
need to secure it so it doesn't keep flexing or it will break
right off some time when you least expect it to fail.

Martin

Butch Bussen writes:
> Unfortunately I'm no good at soldering stuff like that.  Some one else
> mentioned a circuit using transisters.  I'd like to have that diagram,
> as I might be able to do that, although the only transister audio
> oscilators I recall used a center tapped audio transformer.

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