845/D Full Music tube direct heated high power triode 1 pair
Cena wersji podstawowej: 3099,99 PLN ( 2520,32 PLN netto)
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Lampa elektronowa Full music 845D#

845
  • Podstawa z ceramiki i miedzi
  • 4 złocone piny
  • węglowe żarniki

Classification#


Dome-type bulb of glass, filametary of carbennation Th-w a Copper ceramic base with four-prong bayonet golden pins, carbon plate triode.

Application #


Audio power amplifier Class A1 or Class AB1.

Dimensions #


Dimensions, outline diagrams of the tube and bases, and the arrangement of electrode connections to the base terminals are shown in Figures 1 and 2.

845_01



Nominal operating conditions and parameters#


Filament voltage* …………………………………………………………… 10V
Nominal filament current …………………………………………………… 3.2A
Plate voltage ………………………………………………………………… 1250V
Grid voltage** ……………………………………………………………… -200V
Plate current ………………………………………………………………… 80mA
Plate resistance ………………………………………………………………1.7kohms
Amplification factor …………………………………………………………… 5.0
Load resistance ……………………………………………………………… 3.4 kohms
Signal voltage(pk) ………………………………………………………… …69.0V
Output power ………………………………………………………………… 15W
Grid to plate transconductance………………………………………………3.0mA / V

*Alternating-current filament supply or Direct-current filament supply.
**Alternating-current filament supply is used. The grid and plate returns should be connected to a center tap on the secondary of the filament transformer.
Direct-current filament supply is used. The grid and platter returns are connected to the negative end of the filament.

Characteristics-Average characteristics#


Figure 3. shown typical curves of plate currents of grid voltage for several values of plate voltages. It is alternating-current filament supply.
845_02

Limiting Operation Conditions for Safe Nor simultaneous ratings#


Maximum plate voltage ………………………………………………… 1250 volts
Maximum plate dissipation …………………………………………… 75 watts
Maximum plate current …………………………………………………120mA
Maximum input powe of signal ………………………………………… 150 watts
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