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![]() |

6550 Tung-Sol Beam Pentode Power Amplifier/Audio Tube USA (NOS)
In Stock
Designed for Audio service. This tube carries a 42 watt plate dissipation rating which provides for push/pull amplifier designs up to 100 watts output.
Size: 3.7" tall (base to top of tube) x 1.97" diameter, 4.24" Overall length
New Old Stock * No Longer Available for Export
MFR: Tung-Sol
Made in USA
SKU: 6550-TS-NOS-USA
See Data Sheet
Add to Cart

6550 Tung-Sol Vintage Beam Power Amplifier/Audio Tube with Solid Black Plate (Pull)
In Stock
- Low Hour Pull from Working Equipment
- Second Generation
- Three getters: 2 Side and 1 Top
- Solid Black Pates
Clean Used * No Longer Available for Export
MFR: Tung-Sol
SKU: 6550-TUNG-BP-P

6550 General Electric Vintage Beam Power Amplifier/Audio Tube with Smooth Plates (NOS)
In Stock
- Date code: 63-30
- Smooth Grey plates
New Old Stock * No longer available for export
MFR: General Electric Company
SKU: 6550-GE-63-NOS

6550 General Electric Vintage Beam Power Amplifier/Audio Tube ( NOS)
In Stock
- Date code: 63-30
- Smooth Grey plates
New Old Stock * No longer available for export
MFR: General Electric Company
SKU: 6550-GE-63-NOS

GT-6550 Grove Tubes Beam Power Amplifier/Audio Tube (Pull)
In Stock
- Low hour pull
- 2 Top Getters
- 1 Side Getter
Used * No longer available for export
MFR: Grove Tubes
SKU: 6550-GT-P

KT88 Stromberg-Carlson SC1000 Rebranded Genalex Made in Great Britain (Pull)
In Stock
- Low Hour Pull
- Tested on a Hockok 539C
- Gm range 11250 -11500
Used * No longer available for export
MFR: Genalex
Made in Great Britain
SKU: SC1000-KT88-P

6550 Tung-Sol Beam Power Amplifier Tube (New Production- Russia)
In Stock
Size: 3.7" tall (base to top of tube) x 1.97" diameter, 4.24" Overall length.
New Production * No longer available for export
MFR: Tung-Sol
Made in Russia
SKU: 6550-TUNG-NOS-RUS
Add to Cart

6550C Svetlana High Performance Audio Beam Power Pentode Matched Quad (4) (NIB)
In Stock
The Svetlana™ 6550C is a glass envelope beam power pentode. It is intended for ultra linear audio frequency power amplification service. Close manufacturing specification tolerances and improved processing provide improved reliability and superior sonic performance.
New In Box * No longer available for export
MFR: Svetlana Electron Devices, Inc.
Made in Russia
SKU: SV6550C-MQ

6550B-3 Svetlana High Performance Audio Beam Power Pentode (NIB)
In Stock
The 6550B is an early Svetlana variant of the 6550 made in the 80's.
New In Box * No longer available for export
MFR: Svetlana Electron Devices, Inc.
Made in Russia
SKU: SV6550B-3

6550B-3 Audio Classic High Performance Audio Beam Power Pentode (NIB)
In Stock
The 6550B is an early Svetlana variant of the 6550 made in the 80's.
New In Box * No longer available for export
MFR: Audio Classic
Made in Russia
SKU: 6550B-3