An attempt to improve on the CK718 hearing aid transistor. It was a failure there due to not meeting the strict specifications needed for hearing aid usage, but ideal for other less demanding uses. It was the first one that was cheep enough to be sold to hobbyists in the general public.
N\A, but probably akin to then Western practices.
A small oblong, painted, metal case full of epoxy resin or glass powder and with 3 wire legs at the bottom, protruding through a PVC cap at the bottom. It was initially housed in pre-a cast epoxy oblong case during it's first year of use.
|Designed in.||Early 1950s.|
|Transistors per chip.||1.|
|Power supply.||Battery and low voltage power.|
|Still in use.||No, but may are still in private hands, corporate archives and at museums.|
It was one of America's first moves in to the modern electrical business and it was seen as a national icon at the time.