The Company was an enlargement of All Power Transformers Ltd, who mainly manufactured transformers for other manufacturers in the 1940s-50s. They commenced manufacturing their own power supplies both valve and transistor from about 1957.

They expanded into manufacturing special designs for the Ministry of Defence and maintained an innovative development team. The modular "Lektrokit" system provided the main prototype development aid for most electronic work in the UK during the 1960s. This provided both chassis and rack systems that could be rapidly and economically assembled for small quantity production. The advent of PCBs and integrated circuits and consequent miniaturisation lead to its obsolescence.

In 1971 the Company produced one of the first mains powered transformerless power supplies in the UK. The "Lektrokit" sales declined and the Company entered receivership in 1974.