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12DW7 / 7247 types
This 1960s Mullard 7247 is a high reliability 12DW7 preamp tube. It was made in Great Britain (Blackburn factory codes) and labeled for other companies. It has ribbed gray plates and a halo getter. Tube tests as new.
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This 1960s Raytheon 7247 tube is a high reliability 12DW7 preamp tube. It has gray plates with copper grid posts and a halo getter. The yellow print on the glass with the Raytheon logo is mostly gone. Tube tests as new.
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The 1960s Raytheon 7247 tubes in this precision matched pair are high reliability 12DW7 preamp tubes. The yellow Raytheon logo is mostly gone. Both tubes test as new and are matched for both current draw (mA) and transconductance (Gm).
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This 1960s Sylvania 12DW7 tube has long gray plates and a halo getter. The yellow print on the glass has the Sylvania logo. Tube tests as new with very low noise. It ships in its original box.
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This 1960s Telefunken 7247 is a high reliability 12DW7 preamp tube. It has long ribbed plates and a halo getter. The white print on the glass is labeled for The Fisher and the diamond imprint is stamped in the base. Tube tests as new.
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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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