$44.0 Buy It Now or Best Offer
free,30-Day Returns
Seller Store stev_balle
(828) 100.0%,
Location: Lenoir City, Tennessee
Ships to: US,
Item: 256599111050
Return shipping will be paid by:Buyer
All returns accepted:Returns Accepted
Item must be returned within:30 Days
Refund will be given as:Money Back
RCA:RCA
Type:12AX7
Country/Region of Manufacture:United States
RCA 12AX7A Short Gray Plate Tubes – 1960s RCA 12AX7A Short Gray Plate Tubes – 1960s We are pleased to offer two RCA 12AX7A short gray plate tubes from the 1960s, available individually or as a pair at a discounted price. These tubes exhibit perfectly matching mutual conductance (GM) across all four triodes, aligning exactly with factory specifications. They are excellent candidates for those seeking a matched pair, though they don’t quite meet the Euphonic Review standard for a matched pair due to slight variations in MU and Plate Resistance. At Euphonic Review, our standards are far higher than most others on eBay. While GM is the most critical factor in our opinion, we also consider MU and Plate Resistance, even if these factors create no practical or audible difference. Interestingly, the MU on one of these tubes is significantly higher than the typical spec of 100, indicating an extraordinarily strong tube. Both tubes qualify as New Old Stock based on their measurements and will arrive in white boxes for storage and protection. RCA is renowned for making perhaps the best 12AX7 tubes of all, having patented the design in 1947. When you choose RCA, you’re choosing quality, durability, and exceptional sound. Why Choose These RCA 12AX7A Tubes? Authentic RCA Quality: Made by RCA, the original patent holder of the 12AX7 tube, ensuring superior craftsmanship and reliability. Perfectly Matching GM: Both tubes exhibit perfectly matching GM values across all four triodes, adhering to NOS specifications. Exceptional Performance: One tube even exhibits an impressive MU of 106.5, indicating an extra-strong tube with perfectly balanced triodes. Amplitrex Test Results TUBE for sale no. 1 of 2 DC Plate Current: 1.1 / 1.2 AC Plate Current: 0.16 / 0.16 Test Signal Volts: 0.1 / 0.1 Leakage: NONE Mutual Conductance (GM): 1600 / 1600 (NOS VALUE IS 1600) Tube Gain (Mu): 106.5 / 106.5 (WOW! Extra strong and perfect balance) TUBE for sale no. 2 of 2 DC Plate Current: 1.1 / 1.1 AC Plate Current: 0.16 / 0.16 Test Signal Volts: 0.1 / 0.1 Leakage: NONE Mutual Conductance (GM): 1600 / 1600 (NOS VALUE IS 1600) Tube Gain (Mu): 94 / 88.8 (perhaps half a dB difference at max output) At Euphonic Review, we test all our tubes using the most advanced tester on the market, the Amplitrex AT1000. You are guaranteed to get exactly what is advertised. These RCA 12AX7A tubes are an excellent choice for audiophiles and collectors alike. Whether you purchase one or both, you can be assured of receiving a high-quality, high-performance tube from the original innovators of the 12AX7 design. Elevate Your Audio Experience – Own the Best of RCA Today!
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