[NJARC] Antenna Balun

[Scott Roberts]

Thanks Al-
I ended up building a center fed dipole version of the
Slinky antenna for a couple reasons. I used the 4:1
balun design shown in your "full blown system" pic: I
built it based on best guess as to what the dots
meant, as I hadn't gotten your reply yet- I think I
got it right from how you described it. I tested it
last night with the BC 348 and my "alzwhire" antenna,
and it seemed to have a nice effect- it seemed to
smooth a lot of noise out, and I was getting some
decent signals on all bands(except the 200-500kc.- not
much there it appears). Even got Radio Australia on
about 9.6mhz!(at 0800Z) Nice strong signal, too.

I will recheck my setup based on what you just told
me- worst case, I have it backwards... Can't wait to
see how it works with the 1/2 a** slinky, rather than
my 1/4 a** alzwhire...

Thanks again! Have fun(everybody!) at the party
tomorrow night! Wish I could make it, but I have a
prior commitment...

Scott

--- Al Klase <al at ar88.net> wrote:

> Visit our web site - See http://www.njarc.org
> _______________________________________________
> 
> 
> Scott Roberts wrote:
> >
> > .....Also, I have forgotten the meaning of the big
> black
> > dot next to each transformer.
> >   
> The dot indicates the START end of the winding. 
> Phasing is important.
> > And finally, are all three transformers 5 trifilar
> > turns? (3 pieces wire, twisted, passed through one
> > aperture of the core, with 5 reverses in
> direction?)
> >   
> One turn means you go though one of the holes in the
> "binocular" core 
> and back through the other hole.  The exception is
> the designs that 
> specify "in one apateur".  Then a turn just goes
> through one of the 
> holes, and back around the outside.
> 
> Al
> 



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