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![]() |

3-400Z / 8163 Eimac Transmitting Tube (NOS)
In Stock
New Old Stock * No longer available for export
MFR: Eimac
SKU: 3-400Z
Note: Picture for reference only.
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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275 Tube Socket, Ceramic, 5 Pin, 3-500Z, 4-400A, China
In Stock
Tube Socket, Ceramic, 5 pin, 3-500Z, 3-500ZG, 4-400A, 4-400C, 4-125A
Made in China
SKU: 275-RFP
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3-500Z Eimac High-Mu Power Triode (Pull)
In Stock
The Eimac 3-500Z is a compact power triode intended to be used as a zero-bias Class B amplifier in audio or radio-frequency applications.
- Filament: Thoriated Tungsten
- Voltage: 5.0 volts
- Current: 14.5 Amps
Used * No longer available for export
MFR: Eimac
SKU: 3-500Z-EI-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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3-500Z Eimac Transmitting Tube (LHP)
In Stock
3-500Z Eimac Transmitting Tube with Graphite Plate (LHP)
Low Hour Pull * No longer available for export
MFR: Eimac
SKU: 3-500Z-EI-LHP
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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3-500ZG Generic Transmitting Tube (Pull)
In Stock
New Old Stock * No longer available for export
MFR: Generic (China)
SKU: 3-500ZG-GEN-P
Note: Photo for reference only.
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