OK, what I know about TTY loops is from how the Navy ran things. Ships and shore stations typically had anywhere from 6 to 48 loops with bunches of reperfs and printers. They engineered a system to work reliably 24/7/365. So that’s what I have replicated in my basement. I can patch any machine to any TU.
The “small” patch panel SB-1203 has 6 loops, each with up to 4 devices plus TU in series. One 1-amp 120vdc supply runs all 6 loops for one or two patch panels. Each loop has a rheostat so you can adjust it to 60ma.
Larger 24-loop patch panels have connections for two 1-amp supplies.
If you don’t have Navy equipment it isn’t hard to make an equivalent system with jacks and a power supply.
I don’t understand. It’s a 60ma current loop. If you set the loop current to 60ma, every device gets 60ma. It is 60ma whether one device or three. It takes the same power whether one device or three. Period.
A 120vdc loop supply and 1800 ohms or so will run a loop with TU, reperf, and printer no problem unless you’ve got some extra unnecessary resistance somewhere. I run that all the time with no problem. Maybe you need to adjust the KSR rangefinder because of extra inductance from the reperf causing some signal distortion?
What am I missing here?
I’ve got a whole bunch of machines in 24 separate loops running off two 1-amp supplies.
Each loop is just 120v, 60ma.