[600MRG] Good transmission line for low price

[Tom W8JI]

Hi Guys,

There is no real reason to use a balanced line in the link anyway. If 
you are having problems finding cheap cable just use RG59 or whatever 
coaxial. Ground the shield to its own ground rod anywhere along the 
line.  To tell you the truth, if we are trying to isolate common mode 
noise, coax with one independent ground rod midway in the link will be 
better anyway, plus we can bury it.

73 Tom




On 5/24/2023 8:09 AM, Dave Riley via 600MRG wrote:
>
> Back in the day we were all warned not to use ac line cord for antenna 
> feeds.
> Now with modern plastics/pvc maybe things have changed??
>
> I started off by using Belden 72 ohm KW twin lead for receive hoping 
> to see what made the Dallas Lankford " quiet antennas " work ..
>
> Things were looking good till I ran out of the Belden twin lead and 
> they don't make it any more..
>
> Decided to try " Install Link " from Amazon for low money.. 38 bux for 
> 250 feet..
> https://www.amazon.com/gp/product/B0BYCR9P8J/ref=ewc_pr_img_1?smid=A1J9XHX48UC47C&psc=1
>
> Worked great quality for DC interconnects so it was time to measure Z 
> and see if this line would be good for remote receive antennas..
>
> Good news for 630m and lower...
>
> 100 ft. of this terminated line measures 104 ohms Z, good..
>
> _Freq_ _Loss__
> _11mhz - 5.57db
> 4mhz. - 3.27db
> 1.8mhz. - 2.39db
> 475kc. - .69db
> 136kc. - .18db
> 17.2kc. - .16db
>
> Of course a remote LNA at the antenna makes the loss go away..
>
> Am using this now for verticals and loops..
>
> The possibilities are endless...  Phased arrays??
>
> 73s de Dave @ W1FRV / W1NMF  WSPR
>
>
>
>
>
>
>
> .
>
>
>
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