Silver Gradetubes are matched within15%, Gold Gradetubes are matched within10% and Platinum Plus 1%. You are purchasing two “Platinum Grade” tubes. These are JAN (Joint Army Navy) military grade tubes designed to last 10,000 hours.
Item Tag: Preamp Tubes
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1958 Sylvania 12AU7 PLATINUM PLUS GRADE D Getter Preamp Tubes Matched Pair ECC82
***** EVERYTHING WE SELL IS GUARANTEED 100% AUTHENTIC *****All tubes come with a full 30 day, unconditional, no questions asked, money back satisfaction guarantee!Test scores will average between 85% and 95% of NOS values. Individual test scores will be written on the boxes that you receive with your tubes. These tubes were carefully screened by the manufacturers (Baldwin, Allen, Conn, Hammond, Wurlitzer etc.) and specially selected for their low noise and microphonic characteristics.You are purchasing a “Platinum Plus” grade matched pair of tubes. This means that the plates are very tightly matched on a calibrated Hickok TV-7 or Hickok 799 within 1%. Please see our other listings for “Silver, Gold and Platinum” tubes. Silver Grade tubes are matched within 15%, Gold Grade tubes within 10% and Platinum Grade 5%. The Gold and Platinum Grade tubes are recommended for more critical applications such as your preamp and phono stage.The price listed is for one pair of tubes. To purchase more than one pair, when available, simply change the number in the quantity box which is located just below the advertised price. Please email with any questions and/or concerns.Thank you for viewing my listings.
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1960 Philco 12AU7/ECC82 PLATINUM PLUS GRADE Preamp Tubes Matched Pair 90% NOS
Silver Grade tubes are matched within 20%, Gold Grade tubes within 15% and Platinum Grade 10%. You are purchasing a ” Platinum Plus ” grade matched pair of tubes. Test scores will average between 90% and 95% of NOS values.
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Matsushita 12AX7 preamp tubes tested strong 4 tubes
Four Matsushita 12AX7 tubes. TV-7D/U tested strong as shown.
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GENERAL ELECTRIC DUAL MONO TUBE PREAMPLIFIER 5692/6SN7 5693/6SJ7 TESTED
GENERAL ELECTRIC MONO PREAMPLIFIER PAIR 5692/6SN7 5693/6SJ7. It may be good for microphone or reel to reel use. In this case the sale for not working or for parts only.
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Fisher 202-T Stereo Tubes Tuner Preamp
Up for sale a very nice Fisher 202-T tuner stereo tubes preamp.
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NOS 6H23 6N23P 6H23N 6922 6DJ8 ECC88 Matched PAIRS TUBES Preamp Grade SWGP
TUBES Preamp Grade SWGP (# 292083306570 ). 6N23P / 6H23N / 6922. Silver Shield SWGP. Choose Wisely with VOSKHOD “Space-craft” 6N23P (6H23N in Cyrillic), and not the other versions. 6N23P, 6N23P-EV (6H23n, 6H23n-EB).
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1959 Sylvania 12AU7 PLATINUM GRADE Preamp Tubes Matched Pair Test 100% NOS ECC82
Silver Grade tubes are matched within 15%, Gold Grade tubes within 10% and Platinum Plus Grade 1%. You are purchasing a “Platinum Grade ” matched pair of tubes. The price listed is for one pair of tubes.