Electro-Harmonix 12AX7 Matched Trio, High Gain, Low Noise, Spiral Filament, Polished, Classic, Acrylonitrile Butadiene Styrene, Tubes, Brass And Woodwind Instruments, A

Arrived ahead of scheduled delivery. Tubes are operating as expected. No problems so far.

Installed and went out that night and did a four hour gig. They were perfect. Did a 3 hour gig the next night. Tubes sound great.

Funcionaron muy bien en un bugera 333, no tengo como probarlos ni medir la ganancia, pero mejoró mucho el sonido al reemplazar los 3 en la etapa del preamplificador

I would not recommend buying tubes on Amazon. It's a gamble. My two 12AX7 from The Tube Store measured 1400/1400 and 1450/1450 after months of use, so they're definitely Matched and I would recommend tubes from The Tube Store. BUT, I received this trio of EH 12AX7 today from Amazon, and they DO NOT MATCH at all. They measured 1800/1500, 1500/1450, and 1400/1200. The MINIMUM for a good 12AX7 tube in my B&K Tube Tester is 1200. So in addition to being UN-matched, one of them is weak. These should be labeled NON-MATCHED TRIO, picked randomly.

Compre el paquete de tres, en mi probador ninguno me daba más de 60%. No sé si es una estafa, son falsos, usados o qué.