Two different Power Supply Units (PSUs) are known to have been issued by
the Russians for use in combination with
The most common one
is the Standard PSU,
which was used in most East-European countries, such as
East_Germany (DDR) and Czechoslovakia. The
other one is more sophisticated
and TEMPEST proof.
As far as we currently know, it was only used in Poland.
This is the most common PSU that was issued with a Fialka machine.
The majority of Fialka machines that were found after the fall of the
Soviet Union, was supplied with this PSU. It has been confirmed that
this PSU was used in East-Germany (DDR) and in Czechoslovakia.
This variant is larger that the standard PSU and contains a number of
protective measures against eavesdropping through tapping of the power lines
(TEMPEST). Is is connected to the Fialka by means of two wires and produces
a constant voltage as well as a constant current.
As far as we know, this PSU was only supplied with Fialka machines that were
used in Poland, although occasionally this variant has popped up in
other Eastern-Block countries as well.