Beam Power Pentode
This is a New Never Opened, Sealed in Can,
NOS Vacuum Tube. The Picture shown above is for
visual demonstration only and is not the actual tube
you will be receiving.
That tube is still SEALED IN THE CAN!
The 4CX250R / 7580 / 7580W Vacuum tube is a metal Type designed
specifically for use in Class AB1 linear amplifiers
where shock and/or vibration preclude the use of
non-ruggedized tube types. The 4CX250R / 7580 / 7580W will
replace the 4CX250B in equipments where the
range of bias adjustment will tolerate this higher
purveyance tube and where the tuning range can
compensate for the small differences in input
and output capacitances. The 4CX250R / 7580 / 7580W
will deliver more output in most linear amplifiers
which presently employ the 4CX250B and it will
operate with a maximum rated plate and screen
voltage applied in equipments where shock and/or
vibration is experienced.
Characteristics
Plate Dissipation .......... (Max.) 250 Watts
Screen Dissipation ......... (Max.) 12 Watts
Grid Dissipation ........... (Max.) 2 Watts
Frequency for Max. rating .. (CW) 500 MHz
Amplification Factor ....... 5
Filament/Cathode Oxide Coated
Voltage .................... 6.0 Volts
Current .................... 2.6 Amps
Capacitance Grounded Cathode
Input ...................... 17.5 pf
Output ..................... 4.8 pf
Feedthrough ................ .04 pf
Physical Specifications
Cooling Forced Air
Base 9 Pin Special
Air Socket SK-600A
Air Chimney SK-606
Length ..................... 2.46 in; 62.50 mm
Diameter ................... 1.64 in; 41.70 mm
Weight ..................... 4 oz; 113 gm
Preferred Substitutes ...... 4CX250R, 7580, 7580W