TungSol 12AX7 is not the highest gain tube. The right amount of balance and gain gives you good note separation instead. For replacing any 12AX7 tube, TugnSol 12AX7 is our go-to choice.
*****SELLING WORLDWIDE***** >>>> PAIR TUNGSOL 12BZ7 Platinum Matched Pair.BEST DIRECT PLUGIN SUB FOR 12AX7.Matched within 7% or less triode-triode & tube-tube.NOS,TUBES & BOXES are Stock Photos.Supplied in Original Tungsol box.50-77% print visible.I Make sure that the label / print is taken cared of. ****TWICE TESTED; 1st)NO SHORTS,NO GAS AND VERY STRONG TRANSCONDUCTANCE. 2nd) TUBES ARE NOT USABLE UNLESS THEY ARE LIVE AUDIO TESTED WITH NO HUM,VERY LOW NOISE and NON-MICROPHONIC.TESTED USING MODIFIED DYNACO PAS 3 & TUBE OTL. <<<< Having,TUBE1) 28/29 usiemens & 4.0/4.1 ma TUBE2) 30/30 usiemens & 4.3/4.4 ma ,Where 18/18 is minimum and NEW start at 27/27 with Dan Nelson's newly calibrated LORENZ TV7. *****TUBES WITHOUT TEST DATA IS NOT SOUND DECISION & LISTING ADS THAT SAY'S "TEST GOOD" or "TEST STRONG" WITH HIDDEN TEST RESULTS IN VACUUM TUBES IS NOT ENOUGH AND AVOID SURPRISES. ******INTERNATIONAL SHIPPING IS USPS priority mail.*****QUESTIONS ARE ALWAYS WELCOME.
Triode #1 - Plate Current = 1.00mA Rp = 60640 Gm = 1581 Mu = 95.9 Corners = PASS. Triode #2 - Plate Current = 1.07mA Rp = 61426 Gm = 1607 Mu = 98.7 Corners = PASS. 17mm long grey plates, date code of "322435-1" indicating production in August, 1954.
1960's 12AX7A / ECC83 Tung-Sol Tube. Made In USA. Triode:1 Tested Good : 41/ 32 Baseline. Triode: 2 Tested Good: 43/ 32 Baseline. Top O Getter. NOS tubes fall within the GM range published in the RCA Receiving Tube Manual; variation above/below average is normal.