Watson fc 130 frequency counter help?

If you overdrive the input of the counter you can cause images. In that case you could try moving the counter away from the transmitter. If you are simply overdriving the input the images will go away when the counter is far enough not to be overdriven. However, your transmitters may be putting out spurious signals. It's not uncommon. Do you have any kind of filtering on them? Do you have a proper load on them when you check them. If you use a dummy load, the counter may still be able to pick up the transmitter and will probably not be overloaded. If the spurs are still there the transmitter is bad. Don't hook the transmitter up to the counter unless the counter is rated to take the power level the transmitter puts out. You need to use the proper impedance coax cable to connect them.