[600MRG] Good transmission line for low price

[Dave Riley]

Thanks for updates all,

The copper covered aluminum or steel looks like a detector or a battery 
if oxidized so tinning the ends, connecting, then covering with liquid 
tape seems to keep that bug away so far..

Each antenna gets it's own ground rod then the antenna is isolated via a 
toroid..

A tuned toroid transformer at each end seems to cut the ingress if any, 
but from this location there are few strong sigs..
The final improvement is when the power lines go quiet..

True, reels of RG6 are good price but hard to handle in comparison 
here.. The twin wire is very flexible and lays on the ground nicely..

W1FRV / W1NMF



On 5/24/2023 11:57 AM, Brian Pease wrote:
> 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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