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Question about Coax
Dear Cecil: For us, in Argentina, the 75 ohms 3/4" "free tails" hard lines from CATV installers, are great for VHF & UHF. Imported 50 ohms HL are very expensive, and now RG-213 too (3 U$D/m) (and paymento for our jobs are relative low in international currencies). I have seen nice "plumbers delight" cheap and simple home made connectors in a website (I try find its URL). I don't know how many time its dielectric conserves its integrity but I suppose it is more that a RG-8 survives in the atmospheric real conditions. 73s Miguel Ghezzi (LU 6ETJ) |
#12
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Question about Coax
On 11 Sep 2006 19:26:53 -0700, "lu6etj" wrote:
Coaxial lines it is not just RG-213 or 8's, is it? ¿what about hard lines? (suppose a one with its ends absolutely sealed). Normally you only seal one end of the line. That is to prevent the line from developing a light vacuum when it gets cold or high barometric pressure. 73s Miguel Ghezzi (LU 6ETJ) Roger Halstead (K8RI & ARRL life member) (N833R, S# CD-2 Worlds oldest Debonair) www.rogerhalstead.com |
#13
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Question about Coax
On 12 Sep 2006 15:34:16 -0700, "lu6etj" wrote:
Dear Cecil: For us, in Argentina, the 75 ohms 3/4" "free tails" hard lines from CATV installers, are great for VHF & UHF. Imported 50 ohms HL are very expensive, and now RG-213 too (3 U$D/m) (and paymento for our jobs are relative low in international currencies). I have seen nice "plumbers delight" cheap and simple home made connectors in a website (I try find its URL). Here's what I used for 3/4". http://www.rogerhalstead.com/ham_files/conn.htm 1/2" is really simple as it only takes a PL259 and a brass tube coupling. I don't know how many time its dielectric conserves its integrity but I suppose it is more that a RG-8 survives in the atmospheric real sonditions. 73s Miguel Ghezzi (LU 6ETJ) Roger Halstead (K8RI & ARRL life member) (N833R, S# CD-2 Worlds oldest Debonair) www.rogerhalstead.com |
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