💾 Archived View for gemini.spam.works › mirrors › textfiles › hamradio › hardline.ham captured on 2023-01-29 at 08:06:09.
⬅️ Previous capture (2020-10-31)
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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
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