prcguy
Member
Looking at a lab table measurement of a 50 ohm source into a 75 ohm resistive thingee, there will be less than .2dB loss due to the mismatch. However, when there is coax involved different lengths and type of coax will alter the VSWR and resulting loss. In one online conversation someone stated there can be up to a 2.25:1 VSWR using 75 ohm coax of random length on a 50 ohm antenna. That would equate to a .695dB loss.
So the question of using 75 ohm cable on a 50 ohm antenna is complicated and cannot be answered without a complete analysis of the antenna and cable used. In my book do some research on cable loss and use 50 ohm cable on a 50 ohm antenna and you have one less thing to worry about.
So the question of using 75 ohm cable on a 50 ohm antenna is complicated and cannot be answered without a complete analysis of the antenna and cable used. In my book do some research on cable loss and use 50 ohm cable on a 50 ohm antenna and you have one less thing to worry about.
Only one concern with going with the RG-6 or the RG-11 Coax Cable is the (mismatch) being that my Discone Antenna is 50 Ohm & those 2 types of Coax Cable are 75 Ohm? But then again, I am only going to be (receiving) from my antenna to my receiver & not transmitting out at all ever.