50 or 75 ohm reference for analyzer?
Displaying 1-2 of 2
| Jan 6th, 22:52 | |
modernhistorianTotal Topics: 0 Total Posts: 0 |
I bought an antenna analyzer to scan my dipole's SWR. It can be set for either 50 or 75 ohm reference impedance. The initial line is 50 ohm LMR-400 coax, but that connects to a 4:1 balun, then 300 ohm twin line to the antenna. 300 divided by 4 is 75, so should I use 75 or 50 as the reference? I get significantly different results when changing. Thanks. |
| Jan 7th, 13:56 | |
W1VTJoined: Apr 4th 1998, 00:00Total Topics: 0 Total Posts: 0 |
Nearly all modern ham rigs are designed for 50 ohms, so you should use 50 ohms as the reference. Zack Lau W1VT ARRL Senior Lab Engineer |
Displaying 1-2 of 2