GS-1b
TRIODE
The GS-1b triode fulfills generation and amplification functions in grounded-grid circuits in continuous wave operation in the decimetric and metric wavelength ranges. It is physically identical to the GS-31b, but has minor electrical differences. It's projected operational life is >250 hours, 25% of the GS-31's projected 1000+ hours. As with most Russian power triodes, the heat sink on the GS-1b is removable. The GS-1b without a radiator is designated GS-2b. A little-seen variant, the GS-1b-1, exists; it has minor physical differences and a higher input capacitance than the GS-1b. A drawing and capacitance values for the GS-1b-1 appear at the bottom of this page. |
GENERAL | |
Cathode: indirectly heated, dispenser, oxide-coated. | |
Envelope: metal-ceramic. | |
Cooling: forced air. | |
Height, mm, at most: | with heat sink (GS-1b): 147 |
without heat sink (GS-2b): 134 | |
Diameter, mm, at most: | with heat sink (GS-1b): 100.2 |
without heat sink (GS-2b): 65 | |
Mass, kg, at most: | with heat sink (GS-1b): 1.2 |
without heat sink (GS-2b): 650 |
A - anode; C - grid; KP - cathode and heater; P - heater |
ENVIRONMENTAL OPERATING CONDITIONS | |
Vibration loads: | |
frequency, Hz | 5-200 |
acceleration, m/s² | 98 |
Multiple loads with acceleration, m/s² | 343 |
Ambient Conditions: | |
Temperature, °C | -60 to +70 |
Relative humidity at up to +40 °C, % | 95-98 |
NOMINAL ELECTRICAL PARAMETERS | |
Heater voltage, V | 12.6 |
Heater current, A | 3.2 |
Mutual conductance (V_{a} = 2KV, I_{a} = 250 mA, delta V_{g} = 1V), mA/V | 30 |
Operating point (negative V_{g}, V_{a} = 2KV, I_{a} = 250 mA), V | 9 |
input capacitance, pF: | 21.5 |
Maximum output capacitance, pF: | 4.5 |
transfer capacitance, pF: | 0.12 |
Warm up time, s, at most | 180 |
Output power, V_{a} = 1.8KV, I_{a} = 500 mA, wavelength 60 cm | >360 |
Output power, V_{a} = 1.7KV, I_{a} = 700 mA, wavelength 30 cm | >180 |
Designed Tube Life (hours) | >250 |
ELECTRICAL PARAMETER LIMITS | |
Heater voltage, V | 11.9-13.3 |
Heater current, A | 2.9-3.5 |
Mutual conductance (V_{a} = 2KV, I_{a} = 250 mA, delta V_{g} = 1V), mA/V | 25-35 |
Operating point (negative V_{g}, V_{a} = 2KV, I_{a} = 250 mA), V | 6-12 |
input capacitance, pF: | 19-24 |
output capacitance, pF: | 3.8-5.2 |
DC Anode voltage, KV: | 3 |
Anode voltage, instantaneous value, KV: | 6 |
Grid voltage (instantaneous value), V | -400 to +120 |
Cathode current (r.m.s. value), A | 1.4 |
Anode Dissipation, W: | 1.0x10^{3} |
Grid Dissipation @<60°C / @100-120 °C, W: | 22 / 15 |
Temperature at anode lead, °C | 200 |
Temperature at cathode and grid leads, °C | 120 |
Temperature at external ceramic parts, °C | 250 |
Wavelength,cm | 28-100 |
Averaged Characteristic Curves: U_{f} = 12.6V; _______ grid; _ _ _ _ grid-anode; (voltage noted on each trace) |
P_{out} (Watts) |
Anode Current (mA) Averaged Characteristic Curves: U_{f}= 12.6V; Wavelength = 28cm |
P_{out} (Watts) |
Anode Current (mA) Averaged Characteristic Curves: U_{f}= 12.6V; Wavelength = 60cm |
GS-1b-1 Triode A - anode; C - grid; KP - cathode and heater; P - heater Input capacitance is 23.5 +/- 2.5 pF, 2 pF higher than the GS-1b. |