[Kenwood] TS-940S operation with MTM-432 Transverter

[Ray, W2EC]

I've had several direct requests for info on how I hooked this up so I'm
posting the comments to the whole list:

Here are some links to my TS-940S / MTM-432 info.

1. "http://www.geocities.com/ac_cars/mtm432.jpg"  This is a picture of
my MTM-432 with the cables coming out and going to either the TS-940S or
the Control Box I made. The cable connections on the MTM are well marked
plus documented in the manual so it should be pretty clear what cable
goes where.

2. "http://www.geocities.com/ac_cars/mtmctrl.jpg"  This is a picture of
the little control box I made. A control box is only necessary if you
want to be able to keep the DIN-8 plug for the transverter always
attached to the TS-940S.

   The switch number relates to the schematic. The rotary switch on the
left is SW1 and controls the power, which is 12Vdc. Turning this switch
on applies power to the MTM-432 and also activates relay K1 inside the
control box. K1 is a 4PDT 12vdc relay used to switch the MTM-432 in
between the TS-940S and the antenna system plus activating the TS-940S
into transverter mode. This is so the DIN-8 plug can be left in the
TS-940S all the time. If you don't need to have the DIN-8 plugged in all
the time, i.e. you don't mind plugging and unplugging every time you use
the MTM-432, then you can pretty much ignore this control box since its
primary purpose is to allow you to select transverter operation with the
DIN-8 plugged in all the time, although it does also allow switch
selection of the frequency range on the MTM-432. With the DIN-8 plugged
in, but without the switching logic of the control box, the HF RX
antenna is disconnected and you have no way of easily telling the
TS-940S it should be in transverter mode.

   SW2 is the toggle switch and selects either the 432-434mc range or
the 434-436mc range. The little lights are just a visual indication as
to when power is on and what frequency range is in use. The meter of
course measures current draw of the MTM-432 in receive and transmit.

3. "http://www.geocities.com/ac_cars/schematic.jpg"  This is the
schematic for my control box. I did this many years ago when I switched
the MTM-432 from my TS-430S to the TS-940S. You'll note the callsign on
the sheet is WA2QNX, my former call. The date changed becasue I added a
fw text comments to the schematic last night. Hopefully this schematic
will make some sense. 

Its very simple, once set up you just set the TS-940S to 28.0mc band and
turn on the control box. All transverter operation and antenna switching
is performed when K1 activates and the TS-940S is then operated
normally, but thru the MTM-432 providing a 70cm signal.

Good luck!

73, Ray  W2EC