EF95/6AK5/5654 Miniature Pentode
General Information
The EF95/6AK5/CK5654/ 5654 is a heater cathode sharp cut off r.f. pentode capable of operation up to 400mc for use H.F. amplifiers and in low power applications at high or ultra high frequency. It is designed for dependable operation under shock vibration conditions.
Characteristics
Cathode |
Oxide coated |
unipotential |
|
Heater Voltage |
6.3 |
V |
|
Heater current |
75 |
mA |
|
Typical Operating Conditions
Class A1 Amplifier |
|
|
|
|
|
|
|
Anode Voltage |
120 |
180 |
V |
Grid 2 Voltage |
120 |
120 |
V |
Cathode Bias Resistor |
200 |
200 |
Ω |
Anode Current |
7.5 |
7.7 |
mA |
Grid 2 Current |
2.5 |
2.4 |
mA |
Transconductance |
5.0 |
5.1 |
mA/V |
Anode Resistance |
300,000 |
500,000 |
Ω |
Internal Resistance |
34,000 |
69,000 |
Ω |
|
|
|
|
(Fixed bias is not recommended for this valve) |
Maximum Ratings
Maximum anode voltage |
Vao |
300 |
V |
|
Va |
180 |
V |
Maximum Anode Dissipation |
Wa |
1.7 |
W |
Maximum Grid 2 Voltage |
Vg2o |
300 |
V |
|
Vg2 |
140 |
|
Maximum Grid 2 Dissipation |
Wg2 |
0.5 |
W |
Maximum Grid 2 Supply voltage |
|
180 |
V |
Maximum Positive Control Grid Voltage |
|
1.0 |
V |
Maximum Cathode Current |
Ik |
18 |
mA |
Maximum Cathode to Heater Voltage |
Vkf |
90 |
V |
Inter-electrode Capacitances
|
With screen |
Without screen |
|
Grid to anode |
0.2 |
0.3 |
pF |
Input |
4.0 |
4.0 |
pF |
Output |
2.8 |
2.1 |
pF |
Dimensions
Maximum overall height 45mm
Maximum seated height 38mm
Maximum diameter 19mm
Mounting Position - Any
BASE - British 4 pin
CONNECTIONS
Pin 1 Grid 1
Pin 2 Cathode. Grid 3
Pin 3 Heaters
Pin 4 Heaters
Pin 5 Anode
Pin 6 Grid 2
Pin 7 Cathode. Grid 3
|