The origins of Oltronix is a company "Carl Olsson" founded by Carl Olof Olsson in 1950-51. The first employee was hired in 1952. The addres at this time was Långseleringen 95, Vällingby (10km west of Stockholm), Sweden which was also Carl O Olssons home address at this time. 1955 the companmy moved to Ångermannagatan 122, Vällingby, in 1955 and the name was changed to Oltronix AB about 1958.

Later 1955 Carl O Olsson moved to Atlanta, Georgia, USA, to work at Lockheed, which he did until late 1957. After the Locheed time Carl O Olsson put his focus back on hist own business and it was at this time the name was changed to Oltronix, at this time he and also created Oltronix Inc in Georgia (data sheeets with this name exists from september 1959). 1960 Carl O Olsson moved back to Sweden and continued to expand Oltronix. New office at Jämtlandsgatan 125, Vällingby 1961-62 and in 1964 a subidiary was created in Netherlands. Manufacturing was also started in Torsby, Sweden in the mid 60's which was expanded in 1969. Development and manufacturing in Switzerland and Germany from 1970. Oltronix delivered a large number of power supplies to Cern, Geneva, in the 1970's. Sales offices and agents in several European countries.

The manufacturing in Torsby was besides power supplies manufacturing devices for military and also for the growing telecom business. 1974-77 tghe business there was expanded and concentrated on fewer types due to deliveries to Datasaab, Sweden (banking data systems), a business that was however was cancelled in 1977 whereafter the Torsby business was taken over by employees under the name Tepro AB for some years. At 1977 all Oltronix production had been moved outside Sweden, mainly to Netherlands.

Carl O Olsson moved to Switzerland during the 1970's and was also engaged in private avionics. He was one of the founders of what is now called AOPA-Sweden (Aircraft Owners and Pilots Association). About 2003 the business in Holland was sold off including the brand name. Carl O Olsson died in 2009 leaving the Swiss business long-time emplyee (1962) Leif Pihlblad who should close it.