Transmitting Tubes

• Filament: Thoriated Tungsten
• Voltage: 9.0 volts
• Current: 39.5 – 43.5 Amps
• Amplification Factor (Grid Screen): 5.5

New Old Stock * No longer available for export
MFR: Eimac
SKU: 4CX3000A

Data Sheet

This New Old Stock (NOS) tube has been recently tested and meets all technical specifications. The Warranty period for this tube is Ninety Days from the date of purchase, for the original customer only.  Please follow the instruction insert for proper installation.

Eimac Transmitting Tube
New Old Stock * No longer available for export
SKU: 4CX250B-EI-NOS

This New Old Stock (NOS) tube has been recently tested and meets all technical specifications. The Warranty period for this tube is Ninety Days from the date of purchase, for the original customer only.  Please follow the instruction insert for proper installation.

This is a “Good Used Tube” or “Pull”. Some are removed from New or Reconditioned Military or Commercial Equipment. This tube receives the Full RF PARTS Testing, and is electrically similar to our NOS tube at 95%-100%. There may be some minor scratches or discoloration indicating that the tube had been in a socket.

Used * No longer available for export
MFR: Eimac
SKU: 4CX250B-EI-P

NOTE: PICTURE FOR REFERENCE ONLY. CONDITION MAY VARY 

This tube has been recently tested and meets all technical specifications. The Warranty period for this tube is Thirty Days from the date of purchase, for the original customer only.  Please follow the instruction insert for proper installation.

Cathode: Oxide Coated, Unipotential
Heating time: 3 Minutes
Heater:
   Voltage: 6 Volts Nominal
   Current: 9 Amps (minimum), 11 Amps (Maximum)

New Old Stock, New In the Box * No longer available for export
MFR: Eimac

Data Sheet

This New Old Stock (NOS) tube has been recently tested and meets all technical specifications. The Warranty period for this tube is Ninety Days from the date of purchase, for the original customer only.  Please follow the instruction insert for proper installation.

Cathode: Oxide Coated, Unipotential
Heating time: 3 Minutes
Heater:
   Voltage: 6 Volts Nominal
   Current: 9 Amps (minimum), 11 Amps (Maximum)

New Old Stock * No longer available for export
MFR: Eimac
SKU: 4CX1500B-EI

Data Sheet

This New Old Stock (NOS) tube has been recently tested and meets all technical specifications. The Warranty period for this tube is Ninety Days from the date of purchase, for the original customer only.  Please follow the instruction insert for proper installation.

• Cathode: Oxide Coated, Unipotenial
• Heater Voltage: 6.0 ±0.3 Volts
• Heater Current at 6 Volts: 9.0 Amps

Data Sheet

New Old Stock * No longer available for export
MFR: Eimac
SKU: 4CX1000A-EI

This New Old Stock (NOS) tube has been recently tested and meets all technical specifications. The Warranty period for this tube is Ninety Days from the date of purchase, for the original customer only.  Please follow the instruction insert for proper installation.

Transmitting Tube 4CX350A / 8321
Used * No longer available for export
MFR: Eimac/Amperex
SKU: 4CX350A-P
Six Month Warranty

See 4CX350AC for Upgrade

• Filament: Thoriated Tungsten 
• Voltage: 6.3 ± 0.3 Volts
• Current @ 6.3 volts: 160 Amps

Rebuilt * No longer available for export
MFR: Eimac
SKU: 4CX15000A-RFPR

Data Sheet

This Rebuilt tube has been recently tested and meets all technical specifications. The Warranty period for this tube is Ninety Days from the date of purchase, for the original customer only.  Please follow the instruction insert for proper installation.

• Cathode: Oxide Coasted, Unipotential
• Heater Voltage: 6.0 +0.3 Volts
• Heater Current, at 6.0 Volts: 5.4 Amps
• Cathode-Heater Potential (maximum): ±150 Volts

Data Sheet

New Old Stock * No longer available for export
MFR: Eimac
SKU: 4CX600J-EI

This New Old Stock (NOS) tube has been recently tested and meets all technical specifications. The Warranty period for this tube is Ninety Days from the date of purchase, for the original customer only.  Please follow the instruction insert for proper installation.