Sowie auch mit Kathodenwiderstand am Standard-Arbeitspunkt (1,65kOhm). The tubes test NOS under standard test conditions as well as in standard self bias application with 1.65kOhms catode resistor. Test result 1 taken at 250V / -2V with1,2mA as standard reference value for NOS tubes.
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Ia2 = 0.8 mA | S2 = 1.6 mA/V.
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TESTED AT 100% STRONG TESTING TUBE MY B&K 747 TUBE TESTER.
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These valves that are well matched and giving good results and spec on an AVO VCM mkIV. Ia2 = 0.8 mA | S2 = 1.5 mA/V. Ia1 = 1.0 mA | S1 = 1.65 mA/V.
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Die Röhre stammt aus einem The Fisher Verstärker (X-100, X-101, X-202, X-1000 usw.). sowie auch mit Kathodenwiderstand am Standard-Arbeitspunkt (1,65kOhm). Test result 1 taken at 250V / -2V with1,2mA as standard reference value for NOS tubes.
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ECC 83 12AX7 ECC83 ECC803S. BOGEN AMP Tested - No microphonics. Tubes TESTED AND sounded good in my BOGEM AMP! No microphonics! halo getter with heavy duty support rod. O Getter Tube. Hickok Military TV-7/u Tube Testers!
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2x TESLA ECC803S (CV4004 7025 ~5751), ~1960 Prototype Series, 100%/Matched, 124+129.where a new/unused tube should have S/gm = ~1.60 mA/V, good value for transconductance starts at 1.2 mA/V. Selected from a larger lot of NOS tubes.
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Tube test NOS. NOS tubes fall within the Gm characteristic range of an average tube, as published in the RCA RECEIVING TUBE MANUAL, which states "Individual tubes, like any manufactured product, may have characteristics that range above or below the values given.
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