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7591A / 7868 types
Price: From $36.00 to $94.00
This Sylvania 7591A tube has gray plates, a halo getter, and a coin base. Some of the tubes in this lot are labeled for other companies (see "product options") but they are all made by Sylvania. Tube tests as new.
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The 1966 Sylvania 7591A tubes in this precisely matched pair were labeled for Fisher. They have gray plates and halo getters. Their black octal bases have yellow print with matching date codes. Both tubes test as new and are precisely matched.
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Price: From $92.00 to $97.00
The Sylvania 7591A tubes in this precisely matched pair have gray plates, halo getters, and coin bases. Flashing may show signs of light use. Both tubes test as new and are precisely matched for both Gm and current draw (mA).
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The 7591A tubes in this precisely matched quad were made by Sylvania and labeled for RCA. They have gray plates and halo getters. All 4 tubes test as new and are precisely matched. Very hard to find matched quads of these vintage hi-fi power tubes!
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The 1960s Westinghouse 7591A tubes in this precisely matched pair were labeled for other companies. They have gray plates and halo getters. Their black octal bases have yellow print with matching date codes. Click "more info" for current availability.
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The 1966 RCA 7868 tubes in this precisely matched pair have gray plates and top and side halo getters. They are labeled for Kimball and have matching date codes. Both tubes test good and are matched for both current draw (mA) and transconductance (Gm)
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Price: From $79.00 to $119.00
The 1960s Sylvania 7868 tubes in this precisely matched pair have the tip on top of the bottles. The yellow or green labels have the Sylvania logo with matching date codes. See product options for current availability.
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TC Tubes specializes in precision testing and matching of vintage and new production vacuum tubes for guitar & bass players, audiophiles, and DIY tube audio enthusiasts. Our website features secure payment options and fast, convenient shipping around the world.
PLEASE NOTE: Orders placed Feb. 6-Feb. 20 will ship Tuesday Feb. 21.
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