GI15B1
(GI1501)
TRIODE
The GI15B1 (GI1501) triode is used as a RF oscillator and amplifier operating in continuouswave or pulsed mode with anode modulation.
The triode is available in two variants differing in the type of cooling: the GI15B1 with a heat sink for forced air cooling and the GI1501 with no heat sink.
GENERAL
Cathode: indirectly heated, oxidecoated.
Envelope: metalceramic.
Height: 88.5 mm with heat sink, 79.7 mm with no heat sink.
Diameter: at most 45 mm with heat sink, 26.3 mm with no heat sink.
Mass: at most 120 g with heat sink, 60 g with no heat sink.
KP  cathode and heater; P  heater; C  grid; A  anode
OPERATING ENVIRONMENTAL CONDITIONS  
Vibration loads:  
frequencies, Hz  1200 
acceleration, m/s²  49 
Multiple impacts with acceleration, m/s²  392 
Ambient temperature, °C  10 to +55 
Relative humidity at up to +25 °C, %  98 
BASIC DATA Electrical Parameters 

Heater voltage, V  12.6 
Heater current, A  0.750.88 
Mutual conductance (at anode voltage 400 V, grid voltage change 0.5 V, anode current 15 mA), mA/V, at least  8 
Negative grid voltage (at anode voltage 400 V, anode current 15 mA), V  41.5 
Interelectrode capacitance, pF:  
input  912 
transfer  23 
Warm up time, s, at most  60 
Output power, W, at least  8.5 
Output power over 1200 h of service, W, at least  7 
Limit Operating Values  
Heater voltage, V  1213.2 
Anode voltage, kV:  
in pulsed operation (with pulse duration at most 5 µs)  4 
DC  0.8 
Cathode current, A:  
r.m.s.  0.15 
in pulsed operation (with pulse duration at most 5 µs)  3.5 
Dissipation, W:  
anode, with forced cooling  80 
grid  2 
Wavelength (in pulsed operation), cm, at least  8.5 
Cathode heating time, s, at least  45 
Temperature, °C:  
anode  200 
leads of grid and cathode  120 
cathode lead (after operation for at most 10 min)  140 
Resistance in grid circuit, kOm  10 