[Elecraft] [K2] Number of toroids in a K2/100

[Kevin Stover]

On Tue, 21 Apr 2015 21:23:58 -0400
Don Wilhelm <w3fpr at embarqmail.com> wrote:

> Kevin,
> 
> If you are building new kits and are intimidated by the toroids - or 
> just want to reduce the effort and have toroids with well stripped and 
> tinned leads, order the toroids from The Toroid Guy.
> 
> If you wind your own, the big challenge is not in the winding (but 
> remember that a straight wire through the core is one turn, and a full 
> wrap around the core is 2 turns), but the challenge is in stripping and 
> tinning the leads.  I strongly recommend the 'solder blob' method - use 
> an iron with a wide tip and a higher than normal temperature (800 degF).
> 
> One of the common problems with K2 construction is poorly stripped and 
> tinned toroid leads.
> 
> 73,
> Don W3FPR

Thanks Don.

No not building a new one just sitting back reminiscing about building #4684. A couple of hours every night after work and weekends. The key for me was to stop at a logicak spot every night so it'd be easy to pick up the next night.

As for stripping enamel off toroid wires I started out with the pool of soder method but soon came up with my own. I used a small propane torch to burn the stuff off followed by a few swipes of fine grit emeory cloth and finally a good thin tinning of solder.

I'll have to dig my assembly manuals out and count them up.

-- 
R. Kevin Stover
AC0H