   
KR
HI - VACUUM TUBE DATA 
Please
select one:
  
 
  
  
 
 
KR300B
Tube Characteristics
| 4
Pin UX4 Base | 
Typical | 
Maximum | 
 
|  
Plate Voltage: | 
300
/ 400 V  | 
- | 
 
|   Cathode Current: | 
- | 
100mA | 
 
|   Dissipation: | 
- | 
45
W  | 
 
|   Grid Voltage: | 
-60
/ -90 V | 
- | 
 
|   Transconductance: | 
6,000 | 
- | 
 
|   Amplification
Factor: | 
3.8 | 
- | 
 
|   Plate Resistance: | 
700
Ohms | 
- | 
 
|   Load Resistance: | 
2K5
Ohms | 
- | 
 
|   Power Output: | 
10
W | 
- | 
 
  Filament Rating:-
   Voltage Uf: | 
  4 / 5 Volts
AC or DC | 
- | 
 
|  
Current If: | 
1.2A | 
- | 
 
 
  
  
KR300BXLS
Clear Glass Tube Characteristics
| 4
Pin UX4 Base | 
Typical | 
Maximum | 
 
|  
Plate Voltage: | 
300
/ 400 V  | 
- | 
 
|   Cathode Current: | 
- | 
120
mA  | 
 
|   Dissipation: | 
- | 
65
W  | 
 
|   Grid Voltage: | 
-70
/ -100 V | 
- | 
 
|   Transconductance: | 
6,000 | 
- | 
 
|   Amplification
Factor: | 
4.0 | 
- | 
 
|   Plate Resistance: | 
N/A | 
- | 
 
|   Load Resistance: | 
N/A | 
- | 
 
|   Power Output: | 
24
W | 
- | 
 
  Filament Rating:-
   Voltage : | 
 4.0 / 5.0 V AC or DC | 
- | 
 
|  
Current : | 
1.2A | 
- | 
 
 
  
  
KR2A3
Single-Plate Tube Characteristics
| 4
Pin UX4 Base | 
Typical | 
Maximum | 
 
|  
Plate Voltage: | 
250
V  | 
- | 
 
|   Cathode Current: | 
- | 
70
mA  | 
 
|   Dissipation: | 
- | 
18
W max. | 
 
|   Grid Voltage: | 
-45
V | 
- | 
 
|   Transconductance: | 
5,500 | 
- | 
 
|   Amplification
Factor: | 
4.0 | 
- | 
 
|   Plate Resistance: | 
700
Ohms | 
- | 
 
|   Load Resistance: | 
2K5 
Ohms | 
- | 
 
|   Power Output: | 
3
W | 
- | 
 
  Filament Rating:-
   Voltage : | 
 2.5 Volts AC or DC | 
- | 
 
|  
Current : | 
2.5A | 
- | 
 
 
  
  
KR
PX25 Tube Characteristics
| 4
Pin UX4 Base | 
Typical | 
Maximum | 
 
|  
Plate Voltage: | 
 400
V  | 
- | 
 
|   Cathode Current: | 
- | 
60
mA  | 
 
|   Dissipation: | 
- | 
30
W max. | 
 
|   Grid Voltage: | 
-20
/ -40 V | 
- | 
 
|   Transconductance: | 
6,000 | 
- | 
 
|   Amplification
Factor: | 
4.0 | 
- | 
 
|   Plate Resistance: | 
N/A | 
- | 
 
|   Load Resistance: | 
N/A | 
- | 
 
|   Power Output: | 
N/A | 
- | 
 
  Filament Rating:-
   Voltage : | 
 4.0 Volts AC or DC | 
- | 
 
|  
Current : | 
2.0A | 
- | 
 
 
  
  
KR10
Tube Characteristics
| 4
Pin UX4 Base | 
Typical | 
Maximum | 
 
|  
Plate Voltage: | 
350
V | 
500
V | 
 
|   Cathode Current: | 
20
mA | 
30
mA  | 
 
|   Dissipation: | 
- | 
. | 
 
|   Grid Voltage: | 
-5
/ -10 V | 
- | 
 
|   Transconductance: | 
 | 
- | 
 
|   Amplification
Factor: | 
4.0 | 
- | 
 
|   Plate Resistance: | 
600
Ohms | 
- | 
 
|   Load Resistance: | 
2K
/ 3K Ohms | 
- | 
 
|   Power Output: | 
20
/ 30 W | 
- | 
 
 
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