überarbeitet am 5.9.2010
In 1969, a new "Walkie Talkie" has been introduced as standard handheld transceiver
in the Swiss Army: the SE-125 developed by Autophon AG, Solothurn.
The set has a typical rounded meta case, the combined microphone / speaker
(the so-called monophone) is in an inclined position at the front of the top face of the set,
at the rear the push-to-talk button and the few other controls in between.
Usually, the SE-125 is powered by a special cylindrical 7,5V battery, as an alternative special 6V NiCd accumulators could be used - the batteries are inserted in a compartment covered by a lid at the bottom face of the set.
At the front and of the top face of the SE-125, You find the "monophone",
it's a combination of a mikrophone and a small speaker and looks like the microphone
part of an old fashioned telephone handset. Just behind it, there is the three position
power switch: = stands for "Off", big dot stands for "On", small dot stands for
"On with squelch activated". The BNC antenna socket is located next to it.
The rotary control is the channel selector, channels 6, 7 and 8 eight are
the common channels found on all SE-125 variants, the frequencies of channels
x1 - x5 are different according to the colour of the type plate - on these
channels, only the SE-125 with the same colour type plate can communicate.
A simple antenna that is made of a kind of stiff wire can be connected to the BNC antenna socket, it's top part can be pulled out to give a total length of 1,2 m. After some time of use, these antennas have been bent many times and do not look like new anymore. The same antenna can be connected via a coaxial antenna cable, this arrangement is called "Granbenantenne" (trench antenna), there has also been an external "Fernantenne" (long distance antenna).
The SE-125 is extremely easy to operate: insert the battery and mount the
antenna, select the desired channel, main switch to "big dot", You should hear
a noise. After having made contact with the second set, switch to "little dot",
the squelch should be active and should be opened, when the other station is on
The SE-125 is a short distance personal transceiver, under standard conditions,
it's operation range is 3 - 5 km, from an optimum hilltop location, You can
reach longer distances, as the VHF signal travels in the distance of sight.
As I remember, there have been moments when we used the cellular phone to
communicate when our SE-125 transceiver's range was too short - the so called
SE-079 (SE stands for "transmitter - receiver" and 079 is the prefix of the
Swiss nationwide mobile telephone network...).
© 5/2008 Martin Bösch