Vacuum Tube - 6550, Tung-Sol Reissue

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Vacuum Tube - 6550, Tung-Sol Reissue

Starting at: $34.95
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
RoHS Compliant
Item ID:
Tung-Sol, Apex Matched
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
Product Measurements
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 version5.6 in. × 4.4 in. × 2.1 in.
Apex Matched Quad version5.6 in. × 4.4 in. × 4.4 in.
Apex Matched Sextet version6.4 in. × 5.6 in. × 4.4 in.
Single version2.1 in. × 2.1 in. × 5.5 in.
Weight (Packaging)Apex Matched Pair version0.45 lbs.
Apex Matched Quad version0.9 lbs.
Apex Matched Sextet version1.35 lbs.
Single version0.225 lbs.

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Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet3.01 MB

Questions and Answers

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Asked by Anonymous on December 28th, 2017.
Matt H
December 28th, 2017
We match these tubes with our proprietary Apex matching system.

Product Reviews

5.00 out of 5 based on 1 reviews
- February 10th, 2012
5 out of 5

Happy to report that I love the sound of these things in a Marshall Master Volume JMP. These replaced a pair of Winged C 6550 which i dropped on a cement floor while removing them to move the amp (bummer). These have every bit of the (very) bright, cutting, detailed sound of the Winged C that make the 6550 so worth using, but the lows, which can get very flubby and buzzy with the Svetlana or a GE are tighter and more detailed with these tubes. These also seem to have a somewhat softer, and/or more harmonically rich sound when overdriven, and are, for lack of a better phrase, less ragged sounding than Winged C or American made 6550 tubes. These are obviously made with the JCM800 in mind and they've done a great job. At this point I still would'nt use these to replace Winged C's in any other application, but these are my new tube of choice for Marshalls, where the Overdrive sound is what its all about.

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