2 NOS Tung-Sol 6550 Metal Base Strong Gm and mA Matched Pair Only Vintage Vacuum Tubes Holy Grail

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Tung-Sol made these tubes for several major distributors logos may vary. Tube in photo represents tube you will receive. Getter construction or logo may differ (manufacturer will not). We will do our best to match logos and construction when pairs/sets are purchased but test results will come first. If you are looking for a specific getter/plate length/logo, etc. please reach out!

At FuzzAudio(.com):

·      All tubes are tested on a calibrated Hickok 539b & Western Electric KS-16650-L1 Tube Testers.

·      30 Day Money Back Guarantee

·       All power and preamp are tubes tested for Mutual Conductance (Gm)

·      Do not buy power or  preamp tubes that have been tested solely on an emissions tester or “tube checker”- this is an inadequate test.

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2 NOS Tung-Sol 6550 Metal Base Strong Gm and Ma Matched Pair Only Vintage Vacuum Tubes Holy Grail

Tube Type / Number: 6550

Actual Brand: Tung-Sol

Printed Brand: Tung-Sol

At Fuzz Audio(.com), all of our tubes are thoroughly tested. No tube tester is perfect, we often test tubes on several different industry grade testers to ensure you get a quality valve.

Original boxes currently in stock? - Yes/No/Maybe- Ask is boxes are important. Boxes are sold on a first come first serve basis- stock changes daily. Reach out if an original box is important!

We do not have original boxes for all vintage tubes. If you require an original box, we will do our best to supply one. Contrary to popular many vacuum tubes did not come from the manufacturer individually boxed. Most tubes were manufactured for industrial use and were shipped and stored in large cardboard boxes with lipstick dividers.