If connected my lp-100a to my flex 6500,shows power out ok but gives alarm for swr , the flex shows 1-1 swr,tried changing Pitt/key/send out,all to no avail,has anyone got any ideas.
Posted 4 years ago
Lee, Elmer
David Decoons wo2x, Elmer
Are you using the internal tuner on the Flex? If so, then the wattmeter will NOT show the correct SWR that the transmitter is seeing. The meter needs to be between the transmitter output and tuner input. You cannot put an external meter between the PA and internal tuner.
Dave wo2x
Correct. SWR bridges that are placed between the antenna and the tuner will never properly read the matched SWR.
They can also read power output incorrectly because they will also read the reflected power that is being "returned" to the antenna for another trip. (Not exactly technically accurate, but put in laymen's terms for simplification.)
I have seen guys baffled because their meter was registering 150 watts from a 100 watt rig and couldn't figure out where the extra power was coming from. It didn't really exist, but the Standing waves were being registered at a place in the line where they were reinforcing each other.
They can also read power output incorrectly because they will also read the reflected power that is being "returned" to the antenna for another trip. (Not exactly technically accurate, but put in laymen's terms for simplification.)
I have seen guys baffled because their meter was registering 150 watts from a 100 watt rig and couldn't figure out where the extra power was coming from. It didn't really exist, but the Standing waves were being registered at a place in the line where they were reinforcing each other.
