GI7b ( similar to AEG LDa ) also GI70b (same tube - no cooler),
Metal-ceramic transmitting triode up to 9 cm.
Oxide cathode indirectly heated.
 

Uh 12.6 V @ 1.925 +/- 0.125 A  Input capacitance      11.1 +/- 1.1 pF  Output capacitance     4.6 +/- 0.4 pF  Feed-through   <= 0.075 +/- 0.02 pF  Ua       2.5 kV   ( peak  9 kV !!! )  Ug1  -400 ... +80 V  Ic        0.6 A  Pa     350 W  Pg1       7 W total weight  170 g

GI7b (left) - GI7bt (right) GI7b (left) - AEG LD11 (right)

 

Datasheet	Datasheet	GI7b 23cm Cavity	GI7b 70cm Cavity	GI7b 23/13cm Cavity
GI7b (PDF)	GI7bt (PDF)	S57UUU	DK2DO (PDF)	VE4MA (PDF)
		GI7b 23cm Cavity	GI7b 2m/70cm Cavity
		OK1KIR (GIF)	HA1YA (PDF)
	.	OK1KIR (PDF)