Hi, a seller in our city has this not familiar looking 6CA7 EH. It has the label in black… 6CA7 EH ElectroHarmonix Made in Russia 06 06 It has a very short base around 2-3mm only above that black base is glass already where in other usual tubes its still part of the base. If pics can be attached here, it will be easier for you to identify it. Thanks a lot. 🙏🏻
No as far as I'm aware Electro-Harmonix never made a coin base 6CA7 (EL34) or are you thinking 6L6. But the Sovtek factory in Saratov Russia (later owned by New Sensor of NY) did make a coin base 6P3S-E which is a Soviet close equivalent to a 6L6GT.
