CV2453 low noise RF triode
amplifier

This valve measures 54x19mm
overall and has a B9A base. 
The EVS data states this valve
was replaced by CV4105
Heater voltage 
6.3V 
Heater current 
370mA 
Max anode voltage 
250V 
Max anode dissipation 
2.5W 
Max cathode current 
20mA 
Max heater cathode voltage 
100V 
Mutual conductance * 
15mA/V 
Capacitances
(in close fitting metal screen) 
Cge nom 
3.55pF 
Cae nom 
0.055pF 
Cag nom 
1.6pF 
Typical operating
conditions: Class A UHF grounded grid amplifier 
Anode voltage 
130V 
Grid voltage 
1V 
Anode current 
16mA 
Power gain 
10db 
Bandwidth 
50MHz 
Noise factor 

900MHz 
11.5db 
800MHz 
10.9db 
700MHz 
10.2db 
600MHz 
9.4db 
500MHz 
8.4db 
*: Mutual conductance measured
at Va=180V, RL=3.3k ohms, Rk=68 ohms, in a mutual conductance bridge max
frequency 1kHz, max input signal to grid 100mV RMS.
Power gain and bandwidth may
be adjusted by altering the coupling between the anode line and the output
loop. Under the typical conditions shown above the relationship between
power gain and bandwidth at 900MHz is:
Power gain 
Bandwidth 
6db 
100Mhz 
8db 
70MHz 
10db 
50MHz 
12db 
37MHz 
14db 
30MHz 
16db 
25MHz 

Pin 
Function 
1 
Grid 
2 
Cathode 
3 
Grid 
4 
Grid 
5 
Anode 
6 
Grid 
7 
Heater 
8 
Heater 
9 
Grid 
