[Elecraft] KX1 - We need to develop the ideal antenna

[Stephen Prior]

I have made no measurements, but experience gained from zip cord
bought from Wal-Mart, left me with the conclusion that it indeed was
pretty poor.  Thanks for the confirmation of why I had no QSOs from
Idaho!

73 Stephen G4SJP

On 16 May 2011 17:51, Jack Smith <jack.smith at cliftonlaboratories.com> wrote:
> 10 years ago, I measured the loss of zip cord, with the results below.
> The measured results are based on a 17 ft length of zip cord.
>
> Frequency       Measured Loss (dB)      Loss (dB)/100 ft
> 5       0.4     2.3
> 10      0.6     3.5
> 15      0.8     4.6
> 20      0.95    5.5
> 25      1.2     6.9
> 30      1.4     8.1
>
>
> For comparison, RG-58 is spec'd at 1.4 dB/100 ft at 10 MHz and RG-178 at
> 3.3 dB/100 ft.  So, zip cord is about as good (or bad) as RG-174 at 10 MHz.
>
> I've significantly improved my measurement ability since then and should
> revisit the subject.
>
> Jack K8ZOA
>
>
>
> On 5/16/2011 12:02 PM, Dale Putnam wrote:
>> Zip cord, at 50 - 72 ohm or so impedance, is a whole lot closer to the center fed impedance of a "close to the ground" dipole.
>> Makes a fair amount of sense, to use it for feedline, clear down to the rig, when the rig has a balanced output.. or to the balanced to unbalanced, 1 to 1 ratio apparatus. And with a stranded, larger than RG-58 or RG-59 coax center, it won't have any additional I-R loss than that coax, and our HF freq. And of course, making the distinction that we are talking about a single band dipole... not a multiband, center fed with what ever the tx is dialed to balanced antenna.
>>
>> --... ...-- Dale - WC7S in Wy
>>
>>
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