Vacuum Tube - 6550A-STR, Tube Amp Doctor, Premium Selected

Tube Amp Doctor (TAD)
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Vacuum Tube - 6550A-STR, Tube Amp Doctor, Premium Selected

Starting at: $43.95
In stock

The Tube Amp Doctor 6550A-STR is built and performs to the same standards as the highly sought after GE 6550A. TAD has meticulously designed the plate material to be as strong and pure as possible resulting in an exceptionally stable, consistent, and reliable 6550. The TAD 6550A features a thick straight glass envelope, a metal base, and an authentic triple getter. The frequency response of this tube is remarkably balanced and smooth. Transparent natural lows and thick rich mids with silky highs make this an excellent tube for HiFi equipment as well as classic bass guitar amplifiers. The Tube Amp Doctor 6550A-STR offers outstanding performance in all applications. This tube is matched for both plate current and transconductance. The TAD 6550A-STR also passes all of the tests required in the Premium Selection process.

RoHS Compliant
Item ID:
Tube Amp Doctor (TAD)
Part Numbers
Single or MatchedOur Part Number
Matched OctetT-6550A-STR-TAD-MO
Matched PairT-6550A-STR-TAD-MP
Matched QuadT-6550A-STR-TAD-MQ
Matched SextetT-6550A-STR-TAD-MS
Product Measurements
No measurements are currently available for this product. Please contact us if you have any questions.
Packaging Information
Packaging DimensionsSingle version6 in. × 2.5 in. × 2.5 in.
Matched Pair version1 in. × 1 in. × 1 in.
Matched Quad version1 in. × 1 in. × 1 in.
Matched Sextet version1 in. × 1 in. × 1 in.
Weight (Packaging)Single version0.237 lbs.
Matched Pair version0.474 lbs.
Matched Quad version0.948 lbs.
Matched Sextet version1.422 lbs.

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