GI-70BT (GI-7B/GI7B,Tropical) Tube. Brand new in box.

The GI-70BT microwave triode operates as an oscillator and an amplifier in continuous-wave or pulsed mode with anode modulation in the centimetric and decimetric wavelength ranges. The GI-70BT with no heat sink. GI7b and GI70BT are completed by factory with coolers (HgAl) and the others (#70) without.

The GI-7b, GI-70b and GI-7bT microwave triode operates as an oscillator or an amplifier in continuous-wave or pulsed mode with anode modulation in the centimetric and decimetric wavelength ranges.  The GI-7"b" is available in two variants differing in the type of cooling:  the GI-7b with a heat sink for forced air cooling and the GI-70b with no heat sink for other systems of cooling.   The GI-7b is physically identical to the GI-6b and GS-9b, although there are electrical differences.  The GI-7bT comes with heat sink only, is more shock- and vibration-proof, and has a larger ceramic structure.  It is designed to be used in Tanks.  The "bT" varies in a few parameters from the "b", and these variations are noted in the tables below.  As with most Russian power triodes, the heat sink on the GI-7b & GI-7bT is removable.

The factory English manual of this tube is here

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