THE [1]
1257
THE 1257 1S A UNIPOTENTIAL CATHODE, THREE ELEMENT HYDROGEN FILLED THY=-
THE [2]
1
THE 1257 1S A UNIPOTENTIAL CATHODE, THREE ELEMENT HYDROGEN FILLED THY=-
IS SUITABLE FOR PRODUCING PULSE OUTPUTS OF
33
IS SUITABLE FOR PRODUCING PULSE OUTPUTS OF 33 MEGAWATTS AT AN AVERAGE
POWER LEVEL OF MORE THAN
4 kW
POWER LEVEL OF MORE THAN 4O Kw.
THE SPECIAL FEATURES OF THE
1257
THE SPECIAL FEATURES OF THE 1257 INCLUDE AN INTERNAL HYDROGEN=RESERVOIR
HEATER VOLTAGE [1]
6.3 V
HEATER VOLTAGE 6.3 6.0 6.6 VOLTS A.C.
HEATER VOLTAGE [2]
6 V
HEATER VOLTAGE 6.3 6.0 6.6 VOLTS A.C.
HEATER VOLTAGE [3]
6.6 V
HEATER VOLTAGE 6.3 6.0 6.6 VOLTS A.C.
HeaTeER Current (AT [1]
6.3 A
HeaTeER Current (AT 6.3 VouTs) 20.0 k40,0 AMPERES
HeaTeER Current (AT [2]
20 A
HeaTeER Current (AT 6.3 VouTs) 20.0 k40,0 AMPERES
HeaTeER Current (AT [3]
0 mA
HeaTeER Current (AT 6.3 VouTs) 20.0 k40,0 AMPERES
Heater (NoTe
1
Heater (NoTe 1)
ReservoiIr VoLTAGE (NoTe [1]
2 V
ReservoiIr VoLTAGE (NoTe 2) 3.5 6.0 VoLTS
ReservoiIr VoLTAGE (NoTe [2]
3.5 V
ReservoiIr VoLTAGE (NoTe 2) 3.5 6.0 VoLTS
ReservoiIr VoLTAGE (NoTe [3]
6 V
ReservoiIr VoLTAGE (NoTe 2) 3.5 6.0 VoLTS
ReSERVOIR CURRENT AT [1]
4.5 A
ReSERVOIR CURRENT AT 4.5 VoLTs 3.0 8.0 AMPERES
ReSERVOIR CURRENT AT [2]
3 A
ReSERVOIR CURRENT AT 4.5 VoLTs 3.0 8.0 AMPERES
ReSERVOIR CURRENT AT [3]
8 A
ReSERVOIR CURRENT AT 4.5 VoLTs 3.0 8.0 AMPERES
MAx. PEAK ANODE VOLTAGE, FORWARD
33 V
MAx. PEAK ANODE VOLTAGE, FORWARD 33.0 KiLovoLvs
MAx. Peak ANODE VoLTace, INVERSE (Note k)
33
MAx. Peak ANODE VoLTace, INVERSE (Note k) 33.0 KirovoLTs
MiN. ANODE SUPPLY VOLTAGE
3.5 V
MiN. ANODE SUPPLY VOLTAGE 3.5 KiLovoLTs D.C.
Max. PeAk ANoODE CURRENT
2000 mA
Max. PeAk ANoODE CURRENT 2000 AMPERES
MAX. AVERAGE ANODE CURRENT
2.6 mA
MAX. AVERAGE ANODE CURRENT 2.6 AMPERES
Max. RMS Anope CURReNT (NoTE [1]
5 mA
Max. RMS Anope CURReNT (NoTE 5) 60 AMPERES A.C.
Max. RMS Anope CURReNT (NoTE [2]
60 mA
Max. RMS Anope CURReNT (NoTE 5) 60 AMPERES A.C.
Max. ANODE CURRENT RATE OF RISE
10000 mA
Max. ANODE CURRENT RATE OF RISE 10,000 AMPERESAMSECOND
Max. PEAK INVERSE TRIGGER VOLTAGE
650 V
Max. PEAK INVERSE TRIGGER VOLTAGE 650 VoLTs
AMB IENT TEMPERATURE [1]
-55
AMB IENT TEMPERATURE -55% 10 £75° Cent.
AMB IENT TEMPERATURE [2]
10
AMB IENT TEMPERATURE -55% 10 £75° Cent.
AMB IENT TEMPERATURE [3]
75
AMB IENT TEMPERATURE -55% 10 £75° Cent.
PeaK NETWORK VOLTAGE [1]
33 V
PeaK NETWORK VOLTAGE 33.0 20.0 KiLovoLTs
PeaK NETWORK VOLTAGE [2]
20 V
PeaK NETWORK VOLTAGE 33.0 20.0 KiLovoLTs
PuLse REPETITION RATE [1]
310
PuLse REPETITION RATE 310 1500 Puises/sec.
PuLse REPETITION RATE [2]
1500
PuLse REPETITION RATE 310 1500 Puises/sec.
PULSE LENGTH [1]
2.5
PULSE LENGTH 2.5 1.3 MICROSECOND
PULSE LENGTH [2]
1.3
PULSE LENGTH 2.5 1.3 MICROSECOND
PuLse ForMING NETWORK IMPEDANCE [1]
8.6
PuLse ForMING NETWORK IMPEDANCE 8.6 15.6 OHMS
PuLse ForMING NETWORK IMPEDANCE [2]
15.6
PuLse ForMING NETWORK IMPEDANCE 8.6 15.6 OHMS
TRIGGER VOLTAGE [1]
1500 V
TRIGGER VOLTAGE 1500 1500 Vourts
TRIGGER VOLTAGE [2]
1500 V
TRIGGER VOLTAGE 1500 1500 Vourts
Peak Power Output (RESISTIVE Loap [1]
92 W
Peak Power Output (RESISTIVE Loap 92% ZN) 31 6.2 MEGAWATT
Peak Power Output (RESISTIVE Loap [2]
31 W
Peak Power Output (RESISTIVE Loap 92% ZN) 31 6.2 MEGAWATT
Peak Power Output (RESISTIVE Loap [3]
6.2 W
Peak Power Output (RESISTIVE Loap 92% ZN) 31 6.2 MEGAWATT
PeAk ANODE CURRENT [1]
2000 A
PeAk ANODE CURRENT 2000 667 AMPERES
PeAk ANODE CURRENT [2]
667 A
PeAk ANODE CURRENT 2000 667 AMPERES
AveRAGE ANODE CURRENT [1]
1.55 A
AveRAGE ANODE CURRENT 1.55 1.3 AMPERES D.Ce
AveRAGE ANODE CURRENT [2]
1.3 A
AveRAGE ANODE CURRENT 1.55 1.3 AMPERES D.Ce
RESERVOIR VOLTAGE [1]
1 V
RESERVOIR VOLTAGE 1S MARKED ON THE BASE OF EACH VC=1257. THI1S 1S THE
RESERVOIR VOLTAGE [2]
1257 V
RESERVOIR VOLTAGE 1S MARKED ON THE BASE OF EACH VC=1257. THI1S 1S THE
RESERVOIR VOLTAGE [3]
1 V
RESERVOIR VOLTAGE 1S MARKED ON THE BASE OF EACH VC=1257. THI1S 1S THE
OPT IMUM RESERVOIR VOLTAGE
1 V
OPT IMUM RESERVOIR VOLTAGE 1S THE MIDPOINT BETWEEN THESE TWO EXTREMES. IN
COOLING OF THE ANODE LEAD
1
COOLING OF THE ANODE LEAD 1S PERMISSIBLE, BUT THERE SHALL BE NO AfR BLAST
ANODE VOLTAGE SHALL NOT EXCEED
5 kV
ANODE VOLTAGE SHALL NOT EXCEED 5 KV.
THE TIME OF ANODE DELAY IS MEASURED BETWEEN THE
26
THE TIME OF ANODE DELAY IS MEASURED BETWEEN THE 26 PERCENT POINT ON
TIME JITTER [1]
1 A
TIME JITTER 1S MEASURED AT THE 50 PERCENT POINT ON THE ANODE CURRENT PULSE,
TIME JITTER [2]
50 A
TIME JITTER 1S MEASURED AT THE 50 PERCENT POINT ON THE ANODE CURRENT PULSE,
I. GRID— GREEN LEAD —LUG FOR#
10
I. GRID— GREEN LEAD —LUG FOR# 10 %CREW
Published value [1]
2
2. HEATER - YELLOW LEAD—LUG FOR 7 SCREwW
Published value [2]
7
2. HEATER - YELLOW LEAD—LUG FOR 7 SCREwW
Published value [1]
3
3. RESERVOIR-RED LEAD —LUG FOR % |0 SCREW T
Published value [2]
0
3. RESERVOIR-RED LEAD —LUG FOR % |0 SCREW T
Published value [1]
4
4. RESERVOIR — RED LEAD—LUG FOR %* {0 SCREW 50
Published value [2]
0
4. RESERVOIR — RED LEAD—LUG FOR %* {0 SCREW 50
Published value [3]
50
4. RESERVOIR — RED LEAD—LUG FOR %* {0 SCREW 50
Published value
5
5. HEATER
