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6CG7 / 6FQ7 tubes
The 1970s GE 6FQ7 / 6CG7 tubes in this precisely matched quad have halo getters and gray plates with copper grid posts. The white labels have the GE logo. All 4 tubes test as new and are matched for both mA and Gm.
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This 1970s Raytheon 6FQ7 / 6CG7 tube was made in Japan. It has a halo getter and short gray plates with copper grid posts. The yellow print on the glass has the Raytheon logo. Tube tests as new with balanced sections and low noise.
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This RCA 6FQ7 / 6CG7 tube has gray plates, a side getter, and a clear top. The red print on the glass has the RCA logo (label may be partial). Tube tests as new.
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The Sylvania 6CG7 / 6FQ7 tubes in this precisely matched pair have halo getters and gray plates with no internal shields. The labels on the glass have the lightening logo. Both tubes test as new and are matched for current draw (mA) and Gm.
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The 1970s Sylvania 6CG7 / 6FQ7 preamp tubes in this precisely matched quad have halo getters and gray plates. The green labels on the glass has PhilipsECG logo. All four tubes are matched for both current draw (mA) and transconductance (about 80% Gm).
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This 1970s GE 6FQ7 / 6CG7 tube has a halo getter and gray plates with copper grid posts. "6FQ7 6CG7 U.S.A." in engraved in the glass with the dot pattern typical of GE tubes. Tube tests as new.
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The 1970s GE 6FQ7 / 6CG7 tubes in this precisely matched pair have halo getters and gray plates with copper grid posts. The white labels have the GE logo. Both tubes test as new and are matched for both mA and Gm.
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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.
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