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TUCoPS :: TV, Cable, Satellite :: hardline.txt

Matching a 75 ohm CATV hardline to a 50 ohm antenna




R:880802/0618c 9178@WB0OIZ [INDEPENDENCE, MO - 64050]
From: WB0OIZ@WB0OIZ
This is how to match the popular 75 ohm CATV hardline to a 50 ohm antenna:
          |                                                  |
          |        Overall Length 0.1628 (wavelength)        |
          |<------------------------------------------------>|
          |                                                  |
          |     75 ohm coax                50 ohm coax       |
          |     e.g. RG11/U                e.g. RG213/U      |
50 ohm----|{{{{{{{{{{{{{{{{{{{{{{----}}}}}}}}}}}}}}}}}}}}}}}}|----- 75 ohm
antenna---|{{{{{{{{{{{{{{{{{{{{{{----}}}}}}}}}}}}}}}}}}}}}}}}|----- xmission
           |                    | |  |                      |          line
           |<-.0814 wavelength->| |  |<--.0814 wavelength-->|
           |                    | |  |                      |
                                  |
                                  |
                                  |
                            Join using suitable
                                 connector
WB0OIZ
            RELAYED BY...N0KGX...GENE

Downloaded From P-80 International Information Systems 304-744-2253


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