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Text File  |  1990-05-20  |  1KB  |  22 lines
  1. R:880802/0618c 9178@WB0OIZ [INDEPENDENCE, MO - 64050]
  2. From: WB0OIZ@WB0OIZ
  3. This is how to match the popular 75 ohm CATV hardline to a 50 ohm antenna:
  4.           |                                                  |
  5.           |        Overall Length 0.1628 (wavelength)        |
  6.           |<------------------------------------------------>|
  7.           |                                                  |
  8.           |     75 ohm coax                50 ohm coax       |
  9.           |     e.g. RG11/U                e.g. RG213/U      |
  10. 50 ohm----|{{{{{{{{{{{{{{{{{{{{{{----}}}}}}}}}}}}}}}}}}}}}}}}|----- 75 ohm
  11. antenna---|{{{{{{{{{{{{{{{{{{{{{{----}}}}}}}}}}}}}}}}}}}}}}}}|----- xmission
  12.            |                    | |  |                      |          line
  13.            |<-.0814 wavelength->| |  |<--.0814 wavelength-->|
  14.            |                    | |  |                      |
  15.                                   |
  16.                                   |
  17.                                   |
  18.                             Join using suitable
  19.                                  connector
  20. WB0OIZ
  21.             RELAYED BY...N0KGX...GENE
  22.