Ruby Tubes 6L6GCBSTR Power Tube

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StewMAX Member Appreciation Event
20% OFF + FREE SHIPPING*
Special offer ends January 16, 2026 at 4:00PM ET

StewMAX Member Appreciation Event
20% OFF + FREE SHIPPING*
Special offer ends January 16, 2026 at 4:00PM ET

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Single Tube Item # 50018-S No longer available
$26.94
Matched Pair Item # 50018-MP No longer available
$52.88
Matched Quad Item # 50018-MQ No longer available
$104.98
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*StewMAX Members receive FREE standard shipping on all orders for the life of their membership. Members also receive special pricing on select items, and exclusive offers each month that may include tools, parts or supplies. Learn More

Ruby Tubes 6L6GCBSTR Power Tube

Similar to our most popular 6L6GCMSTR tube, with about 1-2 watt higher in plate dissipation.

All Ruby Power Tubes are matched using the Magic Parts™ matching process, and the base of the tube is labeled with the plate current and transconductance matching measurements. By matching these parameters, optimal performance and long life are ensured for your amplifier. Ruby Tubes come with a 6-month replacement warranty.
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