The GS-34 triode is rated for power amplification up to 3,000 MHz.  The GS-34 is without heatsink. The GS-34-1 has a 50mm diameter anode cooler, and the GS-34-2 has a 25mm diameter version. This tube is capable of thermally stable performance at 23cm up to approximately 200W (as high as 400W if used for low duty cycle modes like SSB) and, potentially, 13cm with similar characteristics (150W and 250W, respectively), with thermal drift as described. It's an excellent tube for use at lower frequencies, and should be electrically substituable for the GI-7B in PA circuitry while providing significantly more gain, at 15dB or better!!

GENERAL
Cathode:  indirectly heated, dispenser, oxide-coated.
Envelope:  metal-ceramic.
Cooling:  forced air.
Height, mm:	with heat sink: 81 ±2
	without heat sink: 67 ±2
Diameter, mm:	with heat sink: 50 ±0.3
	without heat sink: 36.3, +0.4/-0.2
Mass, gm, at most:	with heat sink (dia: 50mm / 25mm): 160 / 250
	without heat sink: 140

ENVIRONMENTAL OPERATING CONDITIONS
Vibration loads:
frequency, Hz	1 - 1500 / 1500 - 2500
acceleration, m/s²	97.5 / 146
Multiple 10 msec impacts with acceleration, m/s²	731
Linear loads with acceleration, m/s²	975
Ambient Conditions:
Temperature, °C	+ 100 / - 60
Relative humidity at up to +35 °C, %	98

NOMINAL ELECTRICAL PARAMETERS
Heater voltage, V	12.6
Heater current, A	1.08
input capacitance, pF	8.5
output capacitance pF	3
transfer capacitance, at most, pF	<0.06
Warm up time, s, at most	90
Designed Tube Life (hours)	>1500

ELECTRICAL PARAMETER LIMITS
Heater voltage, V	12-13.2
Heater current, A	0.98-1.18
input capacitance, pF	7-10
output capacitance, pF	2.5-3.5
Maximum CW Anode voltage (Va), KV:	2.5
Maximum Instantaneous (pulse) value Anode voltage (Va), KV:	8.5
Maximum CW Cathode current (Ic), A	0.4
Anode Dissipation, air cooling W:	350
Grid Dissipation, W:	3
Tube Temperature, °C	200
Frequency, MHz	300 - 2000 (pulse to 3280)

__________ anode current; __    __    __ grid current;