This out-of-the-way power vacuum tube was widespread, but relatively rarely used by radio amateurs in theirs home-made transmitters, leastwise I could not find any publication of a practical TX circuit or typical telegraph and AM operation ratings in accessible to me post-1950's HAM radio sources. Perhaps it can be explained by the fact that there was a lot of much more usable tubes of the same power, which became available in those years, but such a lack of information puzzles me anyway.
At the same time, among the pirates, GKE-100 tube was very popular, though not considered as the best way to spend a 1500 Volts plate voltage (in comparison with more powerful GK-71 for example).
|RF Power Output||100 Watts||ГКЭ-100 (GKE-100)|
|Maximum Plate Dissipation||80 Watts|
|Filament Voltage||11 Volts|
|Filament Current||2 Amps.|
|Plate Voltage||1500 Volts|
|Screen Voltage||250 Volts|
|Initial Plate Current||80 mA|
|Signal Grid Current||6.5 mA|
|Transconductance (Gm)||2.5 mA/V|
|Input Capacitance||15 mmfd|
|Output Capacitance||10.5 mmfd|
|Grid to Plate Capacitance||0.05 mmfd|
According to pre-WWII Soviet standards, ГКЭ-100 means:
- G (Г) = "generator tube" (Генератор)
- K = "shortwave" (Коротковолновая)
- E (Э) = "has a screen grid" (Экран)
- 100 = "100 watts RF power output"
GKE-100 tube has a direct heated carbide-coated cathode and a wicker molybdenum grid. Noticeable fact: back in 1942, when most machinery has been evacuated from Fryazino factory to Uzbekistan, these grids were woven using an old-fashioned wooden loom.
The earliest mention of this tube, likely, can be found in the mid-1930s in connection with the development of Soviet general WWII mobile radio station "РСБ" (RSB, Base Radio Station) (80 Watts, ГУ-4 (GU-4) exciter and ГКЭ-100 (GKE-100) amplifier), the latest GKE-100 I have ever seen made in the late 1960s.
RSB (Dvina) radiostation promo