[600MRG] Good transmission line for low price

[Brian Pease]

All of my control lines to my matching networks at my tower 300 ft away 
(for 4 bands) are done with buried CU clad AL wire, with the ends 
weather protected and exposed ends tinned. I have a recent 630m tuning 
issue I haven't fixed yet. I hope it is not that 
wire..............................

On 5/24/2023 11:46 AM, lstoskopf at cox.net wrote:
> I agree.  When doing my annual repair of a 4 el SteppIR I got the bright idea of using 4 each 4 wire versions of that Cu/Al wire from each EHU to the base of the tower and combining them there.  Worked well for about 3 months and then disaster.  Turns out that wherever the screw connector nicked the Cu and exposed the Al the whole wire fell apart from corrosion.  Al alone or Cu alone, but not both!  Might have worked if I had used some goo at the antenna connections and taken it right to the shack, but for the effort I took to repair, time is money I guess.
> N0UU
>
>> On May 24, 2023 at 9:14 AM Brian Pease <bpease52 at gmail.com> wrote:
>>
>>
>> Copper clad aluminum wire is a disaster outdoors. I had some for a rotor
>> control line where water got in at the top and corroded whole sections
>> to powder in a couple of years. If I had done a proper drip loop at the
>> top and sealed the ends, it might have lasted longer. This was "direct
>> burial" outdoor loudspeaker cable with a tough outer jacket in addition
>> to the insulation on each wire.
>> On 5/24/2023 9:50 AM, mstangelo at comcast.net wrote:
>>> Dave,
>>>
>>> That price seemed low for copper wire. I checked the specs and the strands are copper clad aluminum. I am curious how it withstands the elements because I've had corrosion issues with similar wire.
>>>
>>> Mike N2MS
>>>
>>>> On 05/24/2023 8:09 AM EDT Dave Riley via 600MRG <600mrg at mailman.qth.net> 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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