Transmitting Tubes
Please choose from the following TRANSMITTING TUBES Sub-Catagory choices:

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

In Stock
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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4X150A / 7034 Ceramic/Glass Transmitting Tube (New Old Stock)

In Stock
4X150A / 7034 Ceramic/Glass Transmitting Tube. New Old Stock
Various USA Brands, Limited Quantity Available, New Old Stock. Not For Export
NOTE: Picture for reference only. Brand and condition may vary.
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4CX1500A Svetlana Power Tetrode (NOS)
In Stock
- Filament: Thoriated tungsten
- Voltage: 5.0 ± 0.25 V
- Current, at 5.0 volts: 38.5 ± 2.0 A
New Old Stock * No longer available for export
MFR: Svetlana
Made in Russia
SKU: 4CX1500A-SVET
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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5CX1500A Penta Radial Beam Power Pentode (NOS)

In Stock
- Filament: Thoriated Tungsten
- Voltage: 5.0 ± 0.25 Volts
- Current, at 5.0 Volts: 40 Amps
New Old Stock * No longer available for export
MFR: Penta Labs
SKU: 5CX1500A-PENTA
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5CX1500B Rebuilt Svetlana Power Pentode
In Stock
Rebuilt using a Svetlana core.
Filament: Thoriated tungsten
Voltage: 5.0 ± 0.25 Volts
Current, at 5.0 volts: 38.5 Amps
Rebuilt * No longer available for export
MFR: ZONUM INDUSTRIES
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811A RF Parts Company SELECT Transmitting Tube, Matched Set of Three (3)
In Stock
- The RF Parts Company SELECT 811A is the best quality 811A tube in current production.
- Usage tests show it to be equal to the much-respected RCA and Svetlana 811A.
- Base indexed and internal structure aligned and supported for both horizontal and vertical operation.
- Ideal for the Collins 30L1 and similar equipment where tubes mount horizontally.
- Each tube is tested at our San Marcos, CA USA facility, prior to shipment.
Six Month Limited Warranty against manufacturing defects and workmanship.
MFG: China
SKU: 811A-RFP-M3
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811A RF Parts Company (SELECT) Transmitter Tube, Matched Set of Two (2)
In Stock
- The RF Parts Company (SELECT) 811A is the best quality 811a tube in current production.
- Usage tests show it to be equal to the much-respected RCA, 811A and Svetlana, 811A.
- Base indexed and internal structure aligned and supported for both horizontal and vertical operation.
- Ideal for the Collins 30L1 and similar equipment where tubes mount horizontal.
- Each RF Parts Company Select tube is tested by RF Parts prior to shipment.
Six Month Limited Warranty against manufacturing defects and workmanship. Sockets in image sold seperately.
MFR: CHINA
SKU:811A-RFP-MP
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811A RF Parts Company SELECT Transmitter Tube
In Stock
- The RF Parts Company SELECT 811A is the best quality 811A tube in current production.
- Usage tests show it to be equal to the much-respected RCA and Svetlana 811A.
- Base indexed and internal structure aligned and supported for both horizontal and vertical operation.
- Ideal for the Collins 30L1 and similar equipment where tubes mount horizontally.
- Each tube is tested at our San Marcos, CA USA facility, prior to shipment.
Six Month Limited Warranty against manufacturing defects and workmanship.
MFG: China
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811A RF Parts Company (SELECT) Transmitter Tube, Matched Quad (4)
In Stock
- The RF Parts Company Tubes (SELECT) 811A is the best quality 811A tube in current production.
- Usage tests show it to be equal to the much-respected RCA, 811A and Svetlana, 811A.
- Base indexed and internal structure aligned and supported for both horizontal and vertical operation.
- Ideal for the Collins 30L1 and similar equipment where tubes mount horizontal.
- Each RF Parts Company Select tube is tested prior to shipment.
Six Month Limited Warranty against manufacturing defects and workmanship. Sockets in image sold seperately.
MFG: CHINA
SKU: 811A-RFP-MQ
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TH6-3 Svetlana Industrial Power Triodes (NOS)
In Stock
- Filament: Thoriated Tungsten Mesh
- Voltage: 7.5 ± 0.37 Volts
- Current @ 7.5 Volts: 100 A
- Amplification Factor (Average): 20
New Old Stock * No longer available for export
MFR: Svetlana
Made in Russia
SKU: TH6-3-SVET
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.