"Jeff Liebermann" wrote in message
...

major snippage

Despite having a fairly broad bandwidth, it's not a perfect or
constant 50 ohms. Unless the radios can tolerate a moderate VSWR (3:1
perhaps?), some kind of tuner might be useful. However, at 3:1 and
with some kind of VSWR controlled tx power reduction, probably the
impedance matching boxes would be sufficient.

Thanks.

================================================== ======

This is true. Although automatic systems, called High Frequency Radio
Group, were being introduced about the time I retired, the older, common
transmit multi-couplers always had to be hand-tuned in those by-gone days.
It was a three-step process that I used to do occasionally. I'm assuming
coupler drawers must have had some reactive components inside. I never had
one open or bothered to dig out the schematics for any of them.

"Sal"