I've been watching Dave teardown equipment so many devices, so I've decided it is time to open my lab power supply and send some photos.
Some background: TEC (that's in cyrillic) power supplies were developed and manufactured in Bulgaria (
http://en.wikipedia.org/wiki/Bulgaria) during the 1970s and 1980s. In that era Bulgaria was part of the Eastern Bloc. All industry was owned and controlled by the state. In 1982 Bulgaria have started to develop and manufacture a clone of IBM PC, known as Pravetz. The country needed a lot of electrical engineers to be trained, so they've open classes in many schools and universities. To ease the lab training they've developed a the TEC-1700K lab supply.
TEC-1700K has six fixed power outputs and a voltage and current controlled one. The outputs are:
+5V/2A ; -5V/1A
+12V/1A; -12V/1A
+15V/1A; -15V/1A
(0V to 36V) at (0A to 1A)
All outputs are active simultaneously. Each one has overcurrent protection.
Fixed outputs share a common ammeter, that is switchable using the six buttons above outputs.
Controlled output has voltage and current meters. There are two rotational potentiometers for coarse setting of voaltage and current. The are are two potentiometers for fine setting that can to be turn by using a screwdriver.
Inside the unit there is a big transformer, some power diodes and transistors that are inside the aluminium case, and 8 PCBs. Total weight is around 10.5 kg.
4 of the pcb's look the same. I suppose that they are used for the outputs and the big aluminium cased potentiometers are used to tune them for +/- 5/12/15 volts.
All elements are using USSR nomenclature IDs. They look pretty standard for the era.