BIRD Digital RF

• 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 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.

Silver coating on these tubes has tarnished due to air exposure

New Old Stock * No longer available for export
MFR: Eimac
SKU: 4CX125C

Transmitting Tube Tetrode, Broadcast/Industrial
New Old Stock * No longer available for export
MFR: Eimac
SKU: 4CX350A-EI
Six Month Warranty

See 4CX350AC for Upgrade

• Plate Dissipation (Max.): 12,000 Watts
• Screen Dissipation (Max.): 450 Watts
• Grid Dissipation (Max.): 200 Watts
• Frequency for Max. rating (CW): 110 MHz
• Amplification Factor: 4.5

New Old Stock, New In Box * No longer available for export
MFR: Eimac
SKU: 4CX10000J

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.

Used * No longer available for export
MFR: Amprex
SKU: 4CX250R-AMP-P

NOTE: Picture for reference only.  Condition and Cosmetics 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.

Transmitting Tube 4CX5000A
New Old Stock * No longer available for export
MFR: Eimac
SKU: 4CX5000A-EI-1
Six Month Warranty