I used to use this big desktop switch for my radios and antennas, the MFJ 4724. I now have a tuner with multiple antenna ports so I sold this and now just use my tuner and a 4 position Alpha Delta switch just for the radios. .
This maybe the one Shadetree mechanic is referring to. It's about $150 but a lot easier than running multiple switches and jumpers. I would recommend this for what you're looking for.
You can see how this one works. You can select up to 4 antennas to go into any 4 radios. The remote/off position is for an optional mini desktop switch selector if you don't want this larger unit on your desktop. In the off position, antennas and radio are grounded and this unit also has a replaceable high static protection tube. MFJ also sells a 6 radio/antenna switch version of this too for about $225
The rear pic shows all radio and antenna ports including a common port. The Transceiver common port is used to send signal via a jumper to accessory devices like a Tuner, SWR/Power meter, and other accessories so all connected radio's can access them then return the signal back to the Antenna common port so all antennas can access them as well. However, If no accessories are used, a small jumper must be connected between both common ports to close this circuit.
This device does require 12v to operate using a 2.5mm power plug.
There will be slight insertion losses and the manual will show you where the SWR may slightly increase on certain ports while operating on some of the HF bands. This is normal and nothing to be too concerned about. On 27 MHz, there shouldn't be any change. The higher frequencies above 54 MHz is where the SWR will significantly increase.
