En tubes and more he visto shuguang pero al doble de caros que en aliexpress.....por el precio conviene comprar los jj apex matched y performance tested si uno le compra a los gringos
https://www.tubesandmore.com/products/12ax7b-shuguang-dual-triode-vacuum-tube
https://www.tubesandmore.com/products/12ax7-ecc83-jj-electronics-apex-performance-vacuum-tube
