Tubes - Transmitting, Audio, Misc.
Please choose from the following TUBES Sub-Catagory choices:
572B![]() |
811A![]() |
6146![]() |
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4CX350 Series![]() |
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SOCKETS![]() |
CHIMNEYS![]() |
PLATE CAPS![]() |
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BOOKS![]() |
BASES![]() |
PARASITIC SUPPRESSOR![]() |

4X250F Eimac Tube Transmitting Radial Beam Tetrode (NOS)
In Stock
4X250F Tube Transmitting Radial Beam Tetrode
New Old Stock * No longer available for export
MFR: Eimac
SKU: 4X250F-EIMAC

4CX1500B/8660 Eimac Transmitting Tube (Pull)
In Stock
Eimac Transmitting Tube
Used * No longer available for export
MFR: Eimac
SKU: 4CX1500B-P
Email rfq@rfparts.com for price quote
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.
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4CX250B / 7203 Eimac Ceramic Transmitting Tube (Pull)
In Stock
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.
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4CX350AC Eimac/CPI Transmitting Tube (NOS)
In Stock
Eimac/CPI Transmitting Tube
Long Life version of 4CX350A
New Old Stock * No longer available for export
MFR: Eimac/CPI
SKU: 4CX350AC-EI
Six Month Warranty

4CX3000A / 8169 Eimac Radial Beam Power Tetrode (NOS)
In Stock
- 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
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.
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4CX250B/7203 Eimac Transmitting Tube (NOS)
In Stock
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.
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4CX350A Amperex Transmitting Tube (4CX350A / DX553 / 8321)(NOS)
In Stock
Amperex Transmitting Tube DX553/4CX350A/8321
New Old Stock * No longer available for export
MFR: Amperex
SKU: 4CX350A-Amp

4CX250R Amprex Transmitting Tube 7580W (Pull)
In Stock
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.
Add to Cart

4CX250R Eimac Transmitting Tube Broadcast/Industrial (NOS)
In Stock
Transmitting Tube, Broadcast/Industrial
New Old Stock * No longer available for export
MFR: Eimac
SKU: 4CX250R-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.
Add to Cart

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