EIMAC 3-500Z PDF

In all cases, air flow rates in excess of the minimum requirements will prolong tube life. NOTE: Two Z tubes in a single amplifier, chassis mounted, may be adequately cooled by use of a fan so mounted as to pressurize the space below the sockets. Fans suitable for use at or near sea level are Pamotor Model , or Model The Rotron "Spartan" fan rpm is also suitable, as is a 3, 3 inch squirrel cage blower 31 00 rpm all cases, the only criteria of proper cooling is the temperature of the tube seals Tube temperatures may be measured with the aid of temperature sensitive paint, spray or crayon. Filament voltage, as measured at the socket, should be maintained within the range of 4. For best tube life, the inrush current to the filament should be limited to two times normal current during turn-on.

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In all cases, air flow rates in excess of the minimum requirements will prolong tube life. NOTE: Two Z tubes in a single amplifier, chassis mounted, may be adequately cooled by use of a fan so mounted as to pressurize the space below the sockets. Fans suitable for use at or near sea level are Pamotor Model , or Model The Rotron "Spartan" fan rpm is also suitable, as is a 3, 3 inch squirrel cage blower 31 00 rpm all cases, the only criteria of proper cooling is the temperature of the tube seals Tube temperatures may be measured with the aid of temperature sensitive paint, spray or crayon.

Filament voltage, as measured at the socket, should be maintained within the range of 4. For best tube life, the inrush current to the filament should be limited to two times normal current during turn-on.

This will minimize thermal stress on the thoriated-tungsten filament wire, which can cause internal tube geometry changes with repeated cycling. Design equipment so that no one can come in contact with high voltages. All equipment must include safety enclosures for high voltage circuits and terminals, with interlock switches to open the primary circuits of the power supply and to discharge high voltage capacitors whenever access doors are opened. Interlock switches must not be bypassed or "cheated" to allow operation with access doors open.

Intermodulation values listed are those measured at the full peak envelope power noted INPUT CIRCUIT - When the Z is operated as a grounded-grid rf amplifier the use of a resonant tank in the cathode circuit is recommended in order to obtain greatest linearity and power output. For best results with a single-ended amplifier it is suggested that the cathode tank circuit operate at a Q of two or more.

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In all cases, air flow rates in excess of the minimum requirements will prolong tube life. NOTE: Two Z tubes in a single amplifier, chassis mounted, may be adequately cooled by use of a fan so mounted as to pressurize the space below the sockets. Fans suitable for use at or near sea level are Pamotor Model , or Model The Rotron "Spartan" fan rpm is also suitable, as is a 3, 3 inch squirrel cage blower 31 00 rpm all cases, the only criteria of proper cooling is the temperature of the tube seals Tube temperatures may be measured with the aid of temperature sensitive paint, spray or crayon. Filament voltage, as measured at the socket, should be maintained within the range of 4. For best tube life, the inrush current to the filament should be limited to two times normal current during turn-on.

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