Re: KX3 with BL2 Question

Posted by rich hurd WC3T on Oct 04, 2017; 5:42pm
URL: http://elecraft.85.s1.nabble.com/KX3-with-BL2-Question-tp7634878p7634890.html

Thanks for catching the math error.     Shows the dangers of multitasking.
 :)

---
72,
Rich Hurd / WC3T / DMR: 3142737
PA Army MARS, Northampton County RACES, EPA-ARRL Public Information Officer
for Scouting
Latitude: 40.761621 Longitude: -75.288988  (40°45.68' N 75°17.33' W) Grid:
*FN20is*


On Wed, Oct 4, 2017 at 1:33 PM, Nr4c <[hidden email]> wrote:

> You can also tie an underwriters knot at the split point.
>
> Actually 67 feet twice makes a 135 foot dipole for 80 meters, not 40.
>
>
> Sent from my iPhone
> ...nr4c. bill
>
>
> > On Oct 4, 2017, at 10:35 AM, rich hurd WC3T <[hidden email]> wrote:
> >
> > Would not a bnc-to-banana plug adapter hooked to a doublet made from 100'
> > of zip cord be equally useful?   Is there even a reason to have a balun
> > in-circuit?   I've read the characteristic impedance of the zip cord (or
> > speaker wire, etc.) is about 75 ohms.  If you "unzipped" 67 feet or so
> and
> > put on a tie wrap (to avoid further unzipping), you'd have a quite
> > serviceable 40 meter dipole with an SWR of 1.5:1 or so.
> >
> > ---
> > 72,
> > Rich Hurd / WC3T / DMR: 3142737
> > PA Army MARS, Northampton County RACES, EPA-ARRL Public Information
> Officer
> > for Scouting
> > Latitude: 40.761621 Longitude: -75.288988  (40°45.68' N 75°17.33' W)
> Grid:
> > *FN20is*
> >
> >
> >> On Wed, Oct 4, 2017 at 10:00 AM, Don Wilhelm <[hidden email]>
> wrote:
> >>
> >> Stan,
> >>
> >> Either of those options will work - however ---
> >> I would suggest minimizing the coax.  The balun will not transform to a
> 50
> >> ohm load, so the coax can run at a high SWR which will give more loss
> than
> >> the window line.
> >>
> >> Whether that minimum is zero or 5 feet will not make a significant
> >> difference, so use whatever is convenient for your station.
> >>
> >> 73,
> >> Don W3FPR
> >>
> >>> On 10/4/2017 9:26 AM, stan levandowski wrote:
> >>>
> >>> When operating a KX3 with the internal ATU into a window line fed
> doublet
> >>> through a BL2 balun, what is the preferred connection method:
> >>>
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