Wow. Just wow. You have created what we call RF Hell. You will inevitably have a high rate of signal collisions. Also the combined signal level of all your transmitters and EMI generators across all bands will be very high which will create strong signal overload of the receivers, both in-band, harmonic, and fundamental overload. Receiver overload causes distortion and even more interfering mixing products are generated. With fundamental overload a strong signal out of band blows through the front end filtering of a receiver so yes, devices in different bands can interfere with each other. You are effectively trying to put a swimming pool into a 5 gallon bucket. If you do buy an SA you will also need some attenuators so you don't overload it as well.
Your only cure is to shut everything down, clean up the EMI/RFI sources, and rebuild the system with careful planning possibly with the aid of an RF consultant. Even then you will still have issues. My former employer sold coaches wireless systems to the NFL some years back and throughout the life of the system we sent engineers to the Super Bowl every year to babysit the radios and manage interference. It was a job that I would not have wanted to do.
On Mon, 31 Mar 2025 22:06:25 -0700
"madbrain via groups.io" <groups_dot_io@...> wrote:
Here are some of the devices/bands I experience problems on.
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73
-Jim
NU0C
Jim Shorney