Re: [TCML] using larger secondary wire for the base

[G Hunter <dogbrain_39560@xxxxxxxxx>]

I configured a 4" x 24" secondary this way.  I wound
it with 28AWG, which is way too fragile for frequent
handling.  This was to be a modular-type TC with
interchangeable toploads and quick-swap secondaries,
so I needed a plan.

I wrapped the last five turns or so at the top with
flexible, vinyl insulated 22AWG stranded hookup wire. 
I put the final 2 turns together thru a short sleeve
of oversize heatshrink.  I made the solder joint
between the 28AWG and 22AWG wires as small and neat as
possible, then covered it with a bit of heatshrink
tubing as well.  Finally, I used a heatgun to shrink
all the tubing.

I did the same thing at the bottom except I used
stranded 14AWG automotive primary wire, leaving a long
pigtail for connection to a ground rod.

Finally, I coated the whole secondary with several
coats of oil-based clear spar varnish.  This anchored
my termination turns nicely. 

I finished the ends of these wires with standard
spade-type terminal lugs (crimped and soldered) for
quick connect/disconnect.

I made this secondary several years ago, and it is
still serviceable, so guess my idea worked.

Greg

--- Scott Bogard <teslas-intern@xxxxxxxxxxx> wrote:

> 
> Hey all,
>      Quick question, I was trying to figure out a
> better way to attach 
> my secondary to my ground and I thought of an idea. 
> Basically there is 
> a danger of snapping off the secondary wire if I
> solder a heavier cable 
> directly to the thin 22 AWG wire, unless I wrap a
> few turns of the 
> heavier wire around the base and secure it so that I
> can solder them 
> together and have no fear of the joint breaking in
> case something gets 
> jiggled.  Is this a bad idea, I don't really see
> how, but I've never 
> heard of anyone actually doing this.  Assuming I use
> two turns or so the 
> inductance change should be negligible.  Thanks.
> 
> Scott Bogard.
> 
> 
>
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