[Elecraft] A couple more questions (toroids and soldering)-answers

[Stuart Rohre]

Winding toroids:   I always use thumb nail to get wire to lay flat to the
toroid, but sometimes going thru the center of small cores, the wire may not
make a sharp 90 degree turn.  This is OK, but it you have what the
fingernail salons call an orange stick, you can push the wire against the
center of the core.  Larger gauges are harder to work like this and again
that is OK.  What you want is for the turns to have friction against the
core, but not have insulation cut if you have to push the turns around to
space them.  Plan ahead and minimal re-spacing will be needed.  Pull the
wire taut manually, without forcing it so hard as to stretch the wire or
break it.

Soldering ground wires on crystal cans.  With a quality Multicore Solder,
you have plenty of internal flux to pre tin the side of the can where you
will sweat on a bus wire.  Pre tin the bus wire as well.  You will find it
solders easily is you are using 63/37 solder.  I have used Multi Core, (now
out of Richardson Tx,) for 45 years plus of soldering.  Always wets easily
due to 5 cores of flux inside the solder wire, without leaving excess flux
at joint.
72,
Stuart K5KVH