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GE 6L6GC - precision matched quad
GE 6L6GC - precision matched quad
Price: $239.00
GE 6L6GC - precision matched quad
The GE 6L6GC power tubes in this premium matched quad have gray plates, dual side getters, black bases, and the 188-5 factory code (Owensboro, Ky). Tubes test as new and are precisely matched for both current draw (mA) and transconductance (Gm).
GM70 - copper plate, matched pairs
GM70 - copper plates, matched pair
Price: $200.00
GM70 - copper plates, matched pair
The military spec GM70 tubes in this precisely matched pair have the highly desirable copper plates. Both tubes have the Russian military OTK insignia. Click "more info" for test results.
RCA 845 - matched pair
RCA 845 - matched pair
Price: $3,000.00
RCA 845 - matched pair
The 1964 RCA 845 tubes in this precisely matched pair (2) have gray plates and bottom D getters. The metal bases have the RCA logo and matching date codes (64-39). Click "more info" for test results.
SED
SED "Winged C" 6550C - matched quad
Price: $224.00
SED "Winged C" 6550C - matched quad
The 2001 SED "Winged C" 6550C tubes in this precisely matched quad (4) were made in St. Petersburg, Russia. The etched print on the glass has the =C= logo and OTK factory mark. Tubes test higher than spec; recommended for fixed bias amps.
Tung-Sol 5998 - black plates
Price: $179.00
Tung-Sol 5998 - black plates
This military spec 1956 Tung-Sol 5998 is an uprated 6AS7G/6080 dual triode tube type. It has black "domino" plates and a top mica with 3 spacers. The Tung-Sol logo is printed on the base and reads "JAN-CTL-5998." Tube tests as new with very low noise.
GE 7044 - premium matched pair
GE 7044 - matched pair
Price: $79.00
GE 7044 - matched pair
The GE 7044 tubes in this precisely matched pair have halo getters and gray plates with copper grid posts. The green print on the glass has the GE logo. Both tubes test as new and are matched for both current draw (mA) and Gm.
Mullard 12AT7 / ECC81 - matched pair
Mullard 12AT7 / ECC81 - matched pair
Price: $104.00
Mullard 12AT7 / ECC81 - matched pair
The early 1970s Mullard 12AT7 tubes in this precisely matched pair have gray plates and halo getters (VF3 series). They have the Amperex logo and the Blackburn, UK factory codes are etched in the glass. Both tubes test as new.
Mullard 12AX7 / ECC83 - f92 series, long plates, matched pair
Mullard 12AX7 / ECC83 - f92 series, long plates, matched pair
Price: $324.00
Mullard 12AX7 / ECC83 - f92 series, long plates, matched pair
The rare 1958 Mullard 12AX7 / ECC83 tubes in this precisely matched pair have 17mm long plates with copper grid posts and halo getters with dual supports (f92 series). Both tubes test as new with balanced sections and phono grade noise levels.
Mullard 12AX7 / ECC83 - matched pair, phono grade
Mullard 12AX7 / ECC83 - matched pair, Philips logo, phono grade
Price: $229.00
Mullard 12AX7 / ECC83 - matched pair, Philips logo, phono grade
The 1976 Mullard ECC83 / 12AX7 tubes in this precisely matched pair have halo getters and short gray plates (I63 series). The white label has the Philips logo and the Blackburn, UK factory code is etched in the glass. Both tubes test as new
Philips 6V6GT - brown base, matched pair
Philips 6V6GT - brown base, matched pair
Price: $109.00
Philips 6V6GT - brown base, matched pair
The 1960s Philips 6V6GT tubes in this precisely matched pair have brown bases, gray plates, and halo getters with lots of flashing. The yellow print on the glass has the Philips logo and "6V6GTY U.S.A." is etched in the glass. Tubes test as new.
RCA 6L6GC - matched pair
RCA 6L6GC - matched pair
Price: $219.00
RCA 6L6GC - matched pair
The 1963 RCA 6L6GC power tubes in this precisely matched pair have black plates and side O getters. The red print on the bases has the Conn and EMI logos. Both tubes test as new. They are matched for current draw (47.6 & 47.6 mA) and Gm (4700 & 4900).
Russian 6Π14Π-EB / 6P14P-EV / 6BQ5 - matched quad
Russian 6P14P-EV / 6Π14Π-EB / 6BQ5 - matched quad
Price: $129.00
Russian 6P14P-EV / 6Π14Π-EB / 6BQ5 - matched quad
The vintage Russian 6P14P-EV (6Π14Π-EB in Cyrillic script) tubes in this precisely matched quad are high-reliability EL84 / 6BQ5 type tubes. They have a higher maximum plate voltage and dissipation than standard 6BQ5 tubes. Tubes test as new.
Sonotone 12AX7 - clear top
Sonotone 12AX7 - clear top, phono grade
Price: $69.00
Sonotone 12AX7 - clear top, phono grade
This 1968 Sonotone 12AX7 / ECC83 tube has gray plates, a side D getter, and a clear top. The yellow print on the glass has the Webcor logo. Tube tests as new with balanced sections and phono/V1 grade noise levels.
Sylvania 12AX7WA - long gray plates
Sylvania 12AX7WA - long gray plates, matched pair
Price: $119.00
Sylvania 12AX7WA - long gray plates, matched pair
The military spec Sylvania 12AX7 tubes in this precisely matched pair have gray plates with copper grid posts and halo getters. The blue or green labels have the PhilipsECG logo and read "JAN 12AX7WA." Both tubes tests as new with phono grade noise levels
Sylvania 6SN7GT -
Sylvania 6SN7GT - "Bad Boy," Emerson label
Price: $84.00
Sylvania 6SN7GT - "Bad Boy," Emerson label
This 1951 Sylvania 6SN7GT tube is from the "Bad Boy" era of Sylvania 6SN7 production (1949-1953). The early black plates have 3 rivets with copper grid posts. The Emerson logo is printed on the base. Tube tests as new with very low noise.
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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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