Radio & Amplifier Service Parts

Transmitting Tetrode
Glass Envelope
Used * No longer available for Export
MFR: Eimac, USA
SKU: 4-400A-EI-JAN-8438-P

Ceramic/Glass Tetrode
HD version of 4X150D
Clean Used * No longer available for export
MFR: Amperex
SKU: 7609-AMP-P

Radial Beam Power Tetrode Transmitting Tube
Used * No longer available for export
MFR: Eimac
SKU: 4X150A-EI-P

NOTE: The photo is for reference only.

Radial Beam Power Tetrode Transmitting Tube
New Old Stock
MFR: Eimac
SKU: 4X150-JAN-7034

NOTE: The photo is for reference only.

8188/4PR400A Radial-beam Pulse Tetrode Modulator Oscillator Amplifier tube. 

Used
MFR: Eimac
SKU: 4PR400A-EI-P

8188/4PR400A Radial-beam Pulse Tetrode Modulator Oscillator Amplifier tube. 

Low Hour Pull
MFR: Eimac
SKU: 4PR400A-JAN-LHP

4-400A  EIMAC Transmit Tube (NOS)

New Old Stock * No longer available for export
MFR: Eimac
SKU: 4-400A-EI-NOS

New Old Stock * New In Box * No longer available for export
MFR: Eimac
SKU: 4-400B-7427 EI-NOS-NIB

• Filament: Thoriated Tungsten
• Voltage: 7.5
• Current: 20.0 – 22.7 Amps
• Amplification Factor: 6.1 – 7.7

Low Hour Pull * No longer available for export
MFR: Eimac
SKU: 4-1000A-EI-LPH

Data Sheet

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.