Contents
Is SWR important for receiving?
Simplified answer: There is no relationship between SWR and receive performance. There is one condition for this simplification to be true: the received RF noise floor must be above your receiver’s noise floor.
How much SWR is too much?
Modern, “fixed output impedance” transmitters, do not like an SWR over between 1.5:1 and 2.0:1 before the power will start reducing to protect the final amplifier transistors. Now, tube-type transmitters can usually handle a much greater SWR range with absolutely no damage to the transmitter.
How does tuning my SWR affect my radio?
If your SWR reading is below the 2 mark, your reading is within tolerance. If your SWR reading is below the 1.5 notch, your antenna system is working very well. If the reading is almost or exactly a 1, then your system is working as good as it can. How does tuning my SWR affect my radio?
What is the relationship between SWR and receive?
Generally speaking, if an antenna analyzer or (other) transmitter shows that the antenna output presents a SWR of 1:1, then what you have is probably about as good as it gets. That does not necessarily mean that what you have is a good antenna setup as exemplified by the extreme example of a dummy load.
How do I adjust the SWR on my CB radio?
Here’s a step by step process for setting or tuning the SWR on your CB antenna: Check your SWR meter : Write down the SWR reading on channels 1, 20, and 40 based on the instructions above. Adjust your antenna: If your SWR reading is higher on channel 40 than it is on channel 1, lower something on your antenna.
Why is the SWR on channel 40 too high?
If the SWR on channel 40 is higher than that on channel 1, your antenna is too long. If the SWR on channel 1 is higher than that on channel 40, your antenna is too short. If your antenna is too long, it is necessary to reduce its physical length. There are several methods for shortening an antenna which vary by manufacturer.