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
SKU:
T-6550A-STR-TAD-X
Item ID:
042006
Brand:
Tube Amp Doctor (TAD)
Type:
Part Numbers
Single or MatchedOur Part NumberUPC/EAN
SingleT-6550A-STR-TAD841358109232
Matched PairT-6550A-STR-TAD-MP
Matched QuadT-6550A-STR-TAD-MQ
Matched SextetT-6550A-STR-TAD-MS
Matched OctetT-6550A-STR-TAD-MO
Product Measurements
Body Height103 mm
Bulb Temperature250°C
Cathode to Heater Voltage≤ 200 V
D.C. Cathode Current, AF Power Amplifier190 mA
D.C. Plate Voltage, AF Power Amplifier680 V
Grid 1 (control) Voltage, Af Power Amplifier-300 V
Grid 1 Control Voltage, Class A1-16.5 V
Grid 1 to Cathode, Grid 3, Grid 2, Base Sleeve, Heater Capacitance< 15 pF
Grid 1 to Plate Capacitance< 0.85 pF
Grid 2 Dc (screen) Dissipation, Af Power Amplifier6 W
Grid 2 Dc (screen) Voltage, Af Power Amplifier440 V
Grid 2 Screen Voltage, Class A1225 V
Heater Current1.6 A
Heater Voltage5.8 V - 6.8 V, 6.3 V nominal
Item Diameter45 mm
Item Height116 mm
Load Resistance, Class A13 kΩ
Output Power (POut) @ 5% Distortion, Class A110 W
Peak AF Grid 1 Control Voltage, Class A114 V
Plate Dissipation, AF power amplifier (Wa)42 W
Plate Voltage, class A1 (Ua)400 V
Plate to Cathode, Grid 3, Grid 2, Base Sleeve, Heater Capacitance< 10 pF
Signal Plate Current, Class A1, maximum105 mA
Transconductance, Class A1 (S)11 mA/V
Zero Signal Grid 2 Screen Current, Class A19 mA
Zero Signal Plate Current, Class A187 mA
Packaging Information
Packaging DimensionsMatched Octet version1 in. × 1 in. × 1 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.
Single version6 in. × 2.5 in. × 2.5 in.
Weight (Packaging)Matched Octet version1.896 lbs.
Matched Pair version0.474 lbs.
Matched Quad version0.948 lbs.
Matched Sextet version1.422 lbs.
Single version0.237 lbs.

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PDF: Specification Sheet Specification Sheet163.85 KB

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