This 1950s Arcturus 6SL7GT tube has black plates and a bottom getter. The red print on the base has the Arcturus logo. Tube tests as new with balanced sections and low noise.
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This rare 1972 military spec Cetron 6SL7WGT tube has ribbed gray plates and a halo getter. The brown base has black print with the Cetron logo and reads "JAN-6SL7WGT." Tube tests as new with very low noise.
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This early 1950s Chelmer Valve ECC35 tube is a European 6SL7 tube type. It has round black plates and bottom getters. The white print on the glass has the Chelmer Valve logo. Tube tests as new with low noise.
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The early 1950s Chelmer Valve ECC35 / 6SL7GT tubes in this precisely matched pair have round black plates and bottom getters. The white print on the glass has the Chelmer Valve logo. Both tubes test as new with balanced sections and very low noise.
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The late 1950s GE 6SL7GT tubes in this precisely matched pair have short bottles, nickel plates, and side getters. The red print on the bases has the GE logo. Both tubes test as new with balanced sections and low noise.
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This 1950s GE 6SL7GT tube has a short bottle, nickel plates, and a side getter. The white or red print with the GE logo. Tube tests as new with balanced sections.
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This 1950s Raytheon 6SL7GT tube has black plates and a bottom getter. The yellow print on the base has the Raytheon Uniline logo. Tube tests as new with balanced sections and low noise.
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This 1958 RCA 6SL7GT tube has black plates and a bottom D getter. The silver print on the base has the RCA logo. Tube tests as new with balanced sections and low noise.
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This 1955 RCA 6SL7GT tube has gray glass and a bottom getter. The black base has silver print with the RCA logo. Tube tests as new.
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The 1954-56 RCA 6SL7GT tubes in this precisely matched pair have gray glass and bottom getters. The silver print on their bases has the RCA logo. Both tubes test as new with low noise. They are matched for both current draw (mA) and Gm.
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This unusual RCA 6SL7GT tube has a short bottle with gray plates plates and a bottom getter. The red print on the glass has the RCA logo. It is labeled "Made in W. Germany" but this tube was probably made in Japan. Tube tests as new with low noise.
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This 1960s Sylvania 6SL7GT tube has a tall bottle, round black plates, and a top halo getter with lots of chrome flashing. The black base has yellow print with the Sylvania lightning logo. Tube tests as new with balanced sections.
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This 1956 military spec Sylvania 6SL7WGT tube has a D getter and a brown base. The green or white print on the base has the Sylvania logo and reads "JAN CHS 6SL7WGT." Tube tests as new with balanced sections and low noise.
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This 1950s military spec Sylvania 6SL7GT / VT-229 tube has round black plates and a bottom getter. The black base has white print that reads "JAN-CHS-6SL7GT VT-229." Tube tests as new with balanced sections and low noise.
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This 1960s Tung-Sol 6SL7GT tube has a tall bottle, ribbed gray plates, and a halo getter. The black base has white print with the Tung-Sol logo. Tube tests as new with balanced sections and low noise.
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This rare Tung-Sol 6SU7GTY is a premium quality 6SL7 tube type selected for section balance and low noise. It has round plates and black glass. The white print on the glass has the RCA label. Tube tests as new with balanced sections and very low noise.
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