Hi all -
I have a potentially stupid question.....
.. but operating under the premise that there are no stupid questions, except for the ones that don't get asked...
I have an MFJ-1700B antenna/transmitter switch -
For those not familiar, here's the manual -http://www.thiecom.de/pdf/MFJ-1700B.pdf
While the manual does say that you can connect multiple transceivers to it at one time,
it does not make clear as to whether you can or should have those other transcievers
turned ON while you're operating one of the others....
I have several tube HF rigs, including the famed Swan-ThreeDrifty, and most all of these rigs really should be on for a while before being used.
As you Elmers know, the world wasn't always "flip the power switch and go"....
So -- Given the design of that switch, where all unused (non-selected) connections are grounded...
And given the fact that it's a royal pain to get at the coax cables for my rigs
I'd kind of prefer:
- to have the various tube rigs on and stabilized
= not to have to climb behind rigs and unscrew connections
- not have a set of disconnections that must be made up every time I want to change rigs --
.. that DOES seem to be the point of this antenna switch...
So -- the $64.000 question ---
Is it safe to transmit using a rig on switch position "A" using antenna "1" or "2"
while another rig is ON and connected to switch position "D"
I guess it's obvious that what I'm worried about is whacking the receiver front end on the rig that's not currently transmitting...or any other not-so-desirable results for other equipment...
Rigs are all at or below 200 watts-- I'm not pushing full legal power through this thing,
even though it's rated for that ...
My usual layout:
A - PFT-101EE
B- Swan 350
C - Ten-Tec Omni
1- Hy-Gain AV-18
2- Hustler 5BTV
3- Various wire antennas, including an N4PC loop fed with ladderline..
Also -- Given the layout above and the details in the manual (which I don't quite understand, for whatever reason) , do I have to have a PL-259 coax cable run
from Transmitter COM to Antenna COM, if I don't have an SWR bridge in line there?
It almost would appear that there's not actually any connection between transmitter-side
and antenna-side, unless you bridge COM and COM using either equipment or a straight cable.
73, and thanks...