GS-1b
TRIODE
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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 (Va = 2KV, Ia = 250 mA, delta Vg = 1V), mA/V | 30 |
| Operating point (negative Vg, Va = 2KV, Ia = 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, Va = 1.8KV, Ia = 500 mA, wavelength 60 cm | >360 |
| Output power, Va = 1.7KV, Ia = 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 (Va = 2KV, Ia = 250 mA, delta Vg = 1V), mA/V | 25-35 |
| Operating point (negative Vg, Va = 2KV, Ia = 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: | 1.0x103 |
| 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: Uf = 12.6V; _______ grid; _ _ _ _ grid-anode; (voltage noted on each trace) |
| Pout (Watts) |
 Anode Current (mA) Averaged Characteristic Curves: Uf= 12.6V; Wavelength = 28cm |
| Pout (Watts) |
 Anode Current (mA) Averaged Characteristic Curves: Uf= 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. |