Vacuum Tube - 6550, Tung-Sol Reissue

Vacuum Tube - 6550, Tung-Sol Reissue

Tung-Sol
Vacuum Tube - 6550, Tung-Sol Reissue image 1
Customer image:<br/>"Tung Sol 6550 RI apex matched pair"
Click to zoom in
Vacuum Tube - 6550, Tung-Sol Reissue image 1
Customer Images:
Customer image: "Tung Sol 6550 RI apex matched pair"
Starting at: $70.85

Out of Stock

This product has substitutes available! Check them out.

Please log in or register to receive an email when this item is back in stock.

Copy of the original type 3 Tung-Sol 6550 made in the 1960s. Triple getter, carbonized screen, and gold plated grid. The current production benchmark of the classic 6550. Made in Saratov, Russia

Apex Tube Matching
Matched versions of this tube use Apex Matching
SKU:
T-6550-TUNG
Item ID:
004597
Brand:
Tung-Sol, Apex Matched
Type:
RoHS Compliant
Part Numbers
Single or MatchedOur Part NumberUPC/EAN
Apex Matched PairT-6550-TUNG-MP609722129800
Apex Matched QuadT-6550-TUNG-MQ609722129817
Apex Matched SextetT-6550-TUNG-MS609722129824
SingleT-6550-TUNG683274021140
Product Measurements by Type
Bulb Temperature250°C
Capacitance, grid to plate0.8 pF
Capacitance, input15 pF
Capacitance, output10 pF
Cathode Current (Ik)190 mA
Grid 1 Voltage-300 V
Grid 2 Dissipation6 W
Grid 2 Voltage, Pentode440 V
Grid 2 Voltage, Triode500 V
Grid Circuit Resistance (Rg), Fixed Bias50 kΩ
Grid Circuit Resistance (Rg), Self Bias250 kΩ
Heater Cathode Voltage, Negative300 V
Heater Cathode Voltage, Positive100 V
Heater Current1.6 A
Heater Voltage6.3 V
Plate Dissipation (Wa)42 W
Plate Voltage (Ua)660 V
Packaging Information
Packaging DimensionsApex Matched Pair versionT-6550-TUNG-MP5.6 in. × 4.4 in. × 2.1 in.
Apex Matched Quad versionT-6550-TUNG-MQ5.6 in. × 4.4 in. × 4.4 in.
Apex Matched Sextet versionT-6550-TUNG-MS6.4 in. × 5.6 in. × 4.4 in.
Single versionT-6550-TUNG2.1 in. × 2.1 in. × 5.5 in.
Weight (Packaging)Apex Matched Pair versionT-6550-TUNG-MP0.45 lbs.
Apex Matched Quad versionT-6550-TUNG-MQ0.9 lbs.
Apex Matched Sextet versionT-6550-TUNG-MS1.35 lbs.
Single versionT-6550-TUNG0.225 lbs.
Product Measurements by Item
T-6550-TUNG-MP - Apex Matched Pair versionBulb Temperature250°C
Capacitance, grid to plate0.8 pF
Capacitance, input15 pF
Capacitance, output10 pF
Cathode Current (Ik)190 mA
Grid 1 Voltage-300 V
Grid 2 Dissipation6 W
Grid 2 Voltage, Pentode440 V
Grid 2 Voltage, Triode500 V
Grid Circuit Resistance (Rg), Fixed Bias50 kΩ
Grid Circuit Resistance (Rg), Self Bias250 kΩ
Heater Cathode Voltage, Negative300 V
Heater Cathode Voltage, Positive100 V
Heater Current1.6 A
Heater Voltage6.3 V
Plate Dissipation (Wa)42 W
Plate Voltage (Ua)660 V
T-6550-TUNG-MQ - Apex Matched Quad versionBulb Temperature250°C
Capacitance, grid to plate0.8 pF
Capacitance, input15 pF
Capacitance, output10 pF
Cathode Current (Ik)190 mA
Grid 1 Voltage-300 V
Grid 2 Dissipation6 W
Grid 2 Voltage, Pentode440 V
Grid 2 Voltage, Triode500 V
Grid Circuit Resistance (Rg), Fixed Bias50 kΩ
Grid Circuit Resistance (Rg), Self Bias250 kΩ
Heater Cathode Voltage, Negative300 V
Heater Cathode Voltage, Positive100 V
Heater Current1.6 A
Heater Voltage6.3 V
Plate Dissipation (Wa)42 W
Plate Voltage (Ua)660 V
T-6550-TUNG-MS - Apex Matched Sextet versionBulb Temperature250°C
Capacitance, grid to plate0.8 pF
Capacitance, input15 pF
Capacitance, output10 pF
Cathode Current (Ik)190 mA
Grid 1 Voltage-300 V
Grid 2 Dissipation6 W
Grid 2 Voltage, Pentode440 V
Grid 2 Voltage, Triode500 V
Grid Circuit Resistance (Rg), Fixed Bias50 kΩ
Grid Circuit Resistance (Rg), Self Bias250 kΩ
Heater Cathode Voltage, Negative300 V
Heater Cathode Voltage, Positive100 V
Heater Current1.6 A
Heater Voltage6.3 V
Plate Dissipation (Wa)42 W
Plate Voltage (Ua)660 V
T-6550-TUNG - Single versionBulb Temperature250°C
Capacitance, grid to plate0.8 pF
Capacitance, input15 pF
Capacitance, output10 pF
Cathode Current (Ik)190 mA
Grid 1 Voltage-300 V
Grid 2 Dissipation6 W
Grid 2 Voltage, Pentode440 V
Grid 2 Voltage, Triode500 V
Grid Circuit Resistance (Rg), Fixed Bias50 kΩ
Grid Circuit Resistance (Rg), Self Bias250 kΩ
Heater Cathode Voltage, Negative300 V
Heater Cathode Voltage, Positive100 V
Heater Current1.6 A
Heater Voltage6.3 V
Plate Dissipation (Wa)42 W
Plate Voltage (Ua)660 V

My Project Lists

You must be logged in to add items to a project list.

Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet3.01 MB

Questions and Answers

Click each question to see its answers.
Asked by Anonymous on December 28th, 2017.
Matt H.
December 28th, 2017
Staff Member
We match these tubes with our proprietary Apex matching system.

Product Reviews

5.00 out of 5 based on 4 reviews
- July 30th, 2021
5 out of 5

Shipping was surprisingly quick to Canada. Tubes were packaged extremely well!! Was exited to try the Apex matching system.Tested them using my own trusted testers and they’re the closest matched quads I have purchased! Tung-Sols are my favourite 6550/KT88 type tubes. They sound glorious. I own three separate audio systems at home and they all run these tubes.
Will be purchasing my tubes from Antique Electronic Supply from here on forward!

- April 6th, 2021
5 out of 5

Major improvement for 1959 Leslie 47 amplifier. These sound wonderful. Tested balanced and matched per Apex. Reasonable cost. Very pleased.

- April 16th, 2020
5 out of 5

Excellent quality and no gas.

- February 27th, 2019
5 out of 5

I installed a quad of these in my Conrad-Johnson Premier 11 power amp in place of a set of EHX. I bought the amp used and one of the power tubes was starting to fail so I decided to replace all four. I read some reviews for hifi use and I’m glad I went with the Tung-Sol’s. They sound great. Lots of power, lots of detail and not too bright. You need to burn them in for at least. 24 hours for them to sound their best.

Substitute Products

The following items can be substituted for this product. While not necessarily exactly the same, they will function as replacement items in your project.