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4CX250R Amprex Transmitting Tube 7580W (Pull)
4CX250R Amprex Transmitting Tube 7580W (Pull)

In Stock

$142.91

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.


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4CX350A Eimac Transmitting Tube 8321/4CX350A (NOS)
4CX350A Eimac Transmitting Tube 8321/4CX350A (NOS)

In Stock

$224.91

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

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8167/4CX300A  Raytheon Transmitting Tube Broadcast/Industrial (NOS)
8167/4CX300A Raytheon Transmitting Tube Broadcast/Industrial (NOS)

In Stock

$119.91

The Raytheon 8167/4CX300A is a power tetrode of metal-ceramic construction, designed with an external anode and integral cooling fins.



  • Heater Voltage: 6.0 Volts

  • Heater Current: 2.85 Amps


New Old Stock * No longer available for export
MFR: Raytheon
SKU: 8167/4CX300A-RAY

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4CX250B/M Eimac Transmitting Tube (NOS)
4CX250B/M Eimac Transmitting Tube (NOS)

In Stock

$179.91

The 4CX250B/M is a ceramic/metal, forced-air cooled external-anode tetrode with a maximum anode dissipation rating of 250 Watts. The 4CX250B/M is intended for use in applications where tight control of electrical specifications is required and replaces the 4CX250B in all applications. This tube utilizes a ruggedized internal structure and utilizes a welded anode cap for improved reliability.
New Old Stock * No longer available for export
MFR: Eimac
SKU: 4CX250B/M-EI

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4CX250BT Amperex Special Broadcast/Industrial Transmitting Tube (NOS)
4CX250BT Amperex Special Broadcast/Industrial Transmitting Tube (NOS)

In Stock

$129.91

Special, Broadcast/Industrial
New Old Stock * No longer available for export
MFR: Amperex
SKU: 4CX250BT-AMP

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4CX250BC Svetlana Transmitting Tube (NOS)
4CX250BC Svetlana Transmitting Tube (NOS)

In Stock

$169.91

TransmittingTube
New Old Stock * No longer available for export
MFR: Svetlana
SKU: 4CX250BC-SVET

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YC-136 Eimac Ceramic Transmitting Tube (4CX250B) (Pull)
YC-136 Eimac Ceramic Transmitting Tube (4CX250B) (Pull)

In Stock

$179.91

This tube is an improved version of the 4CX250B, with slightly higher average gain. This tube has been tested, and is electrically similar to a 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: YC-136-P


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.

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4CX350AC Eimac/CPI Transmitting Tube (Pull)
4CX350AC Eimac/CPI Transmitting Tube (Pull)

In Stock

$168.91

Eimac/CPI Transmitting Tube
Long Life version of 4CX350A
Used * No longer available for export
MFR: Eimac/CPI
SKU: 4CX350AC-EI-P

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4CX350FJ-8904 Amperex Transmitting Tube JAN (NOS/NIB)
4CX350FJ-8904 Amperex Transmitting Tube JAN (NOS/NIB)

In Stock

$179.91

4CX350FJ-8904 JAN Amperex Transmitting Tube (NOS/NIB)


The 4CX350FJ / 8904 is intended for Class AB linear RF amplifier service. The tube has rugged internal construction features. The 4CX350FJ/8904 may be used as an exact replacement for the 4CX350F/8322 in most linear applications, requiring only minor circuit adjustment and retuning. The tube has improved intermodulation distortion characteristics. It contains a 26.5 volt heater, and is recommended for new equipment designs.
New old stock * No longer available for export.
Limited 90 Day Warranty.
NSN 5960-00-369-7460
MFR: Amperex, USA

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 4CX350FJ Eimac/JAN Transmitting Tube 8904/4CX350FJ (NOS)
4CX350FJ Eimac/JAN Transmitting Tube 8904/4CX350FJ (NOS)

In Stock

$189.91

Transmitting Tube 4CX350FJ/8904
New Old Stock
MFR: Eimac/JAN
SKU: 4CX350FJ
Six Month Warranty

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Items 21 to 30 of 38 total