Wayne, thanks for the info on the encoding and the names, very cool. Interesting that the Russians call tubes "lamps." Made me think of our own old Tung-Sol Lamp factory. I never understood where the name came from, but that sheds some light on a possible origin of the name. Tubes, valves, and lamps..................I'm not privy to all the details of the situation, but I do know for certain that New Sensor is the legal owner of the Sovtek, Electro-Harmonix, and Svetlana brand names, as well as all the involved trademarks, lock, stock, and barrel, including the the "S" logo. I've read they also have exclusive rights as the importer of these three brand names, including Sovtek amps and Electro-Harmonix guitar effects. They also import Ei, Sino, and JJ tubes, and are a dealer in several well known brands of guitar speakers, capacitors, switches, pots, Accutronics reverb tanks, Hammond iron and chassis, pretty much whatever you need to build a guitar amp, component wise.
I had forgotten to mention this in my earlier post, but you are correct about them being a Western company. New Sensor is based here in the USA.
Thermionic