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![]() |

PLCAP3N National Ceramic Plate Cap for Tubes with Plate Diameter of 1/4" (Pull)
In Stock
This plate cap is sized to fit the popular 6146B / 6146W / 6LQ6 / 8950 / etc style plate cap of approximately 1/4" diameter.
- Size: 1-1/16" long x 9/16" wide x 17/32" High
- Internal spring opening: 1/4" diameter
Used * No longer availabe for export
MFR: National Company
SKU: PLCAP3N-P

Vintage Millen Ceramic Plate Cap For 811A , 572B, 866, and 833 Tubes (NOS)
In Stock
This plate cap is sized to fit the popular 811A / 572B style plate cap of approximately 9/16" diameter.
- Size: 1-1/2" long x 13/16" wide x 3/4" High
- Internal Diameter: 9/16"
- Tested and verified
New Old Stock * No longer available fo reexport
MFR: Millen Manufacturing Company
SKU: PLCAP4-MILLEN

Vintage National Ceramic Plate Cap For 811A , 572B, 866, 813, and 833 Tubes (Pull)
In Stock
This plate cap is sized to fit the popular 811A / 572B style plate cap of approximately 9/16" diameter.
- Size: 1-1/2" long x 13/16" wide x 3/4" High
- Internal Diameter: 9/16"
- Tested and verified
MFR: National Company
SKU: PLCAP4-P

HR-7 Heat-Dissipating Connector Top Cap (Pull)
In Stock
Replacement Aluminum Plate Cap / Anode Heat Radiator for 304TL, 304TH, or tubes having 0.126 diameter anode stem. New. Diameter: 1 3/8" Height: 1 3/8" Hole Size: 0.127. Heat dissipating connectors are used to make electrical connections to the plate and grid terminals of Transmitting tubes, and at same time, provide efficient heat transfer from the tube element and glass seal to the air.
Used * No longer availabale for export
MFR: Generic Brand
SKU: HR-7-GEN-P

HR-8 Eimac Heat-Dissipating Connector Top Cap (NOS)
In Stock
New Old Stock * No longer available for export
Fits 3-1000Z, 4-1000A, 4PR1000A and 833 tubes
MFR: Eimac
SKU: HR-8-EI-NOS
Add to Cart

HR-1 Eimac Heat-Dissipating Connector Top Cap (NOS)
In Stock
For 2-25A and 3C24 tubes and tubes with a .052" pin.
New Old Stock * No longer available for export
MFR: Eimac
SKU: HR-1-EI

HR-6 Eimac Heat-Dissipating Connector Top Cap (Pull)
In Stock
Will fit 3-400Z, 3-500Z & ZG, 4-400A, & 4-400C
Size: 0.88" High x 0.82" Diameter
0.367" Hole Diameter
Used * No longer available for export
MFR: EIMAC
SKU: HR-6-P

PLCAP3 Ceramic Plate cap for tubes with plate diameter of 0.25"
In Stock
Ceramic Plate cap for tubes with plate diameter of 0.25",
MFR: China
SKU: PLCAP3
Add to Cart
926H-138 Birtcher Anode Clamp for 4CX250B, 4X150, 4CX150, 4CX350 (Pull)
In Stock
926H-138 Birtcher Anode Clamp for 4CX250B, 4X150, 4CX150, 4CX350 (Pull)
Used
MFR: Birtcher
SKU: 926H-138-P