Re: KX3 with BL2 Question

Posted by Nr4c on Oct 04, 2017; 5:33pm
URL: http://elecraft.85.s1.nabble.com/KX3-with-BL2-Question-tp7634878p7634889.html

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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