[600MRG] Good transmission line for low price

[Dave Riley]

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



__





.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/600mrg/attachments/20230524/7e810075/attachment.html>