For sale is a macthed pair Raytheon 5755 closely matched at 1% on gain and balanced triodes. Close electrically to an 12AX7 but different pin out. I also sell adapter from 12AX7 to 5755. Price per 2 (one pair). Very reliable tubes. NOS made in USA. Because of there special rugged build this are very quiet and low on microphonics. Excellent tube in phono or pre amplifiers. I use them in a Line Magnetic 219. Price includes 2 mini adapters seen on the picture. So this is plug and play!

I also sell: EL34, 6P3S-E, EL84, ECC81, 5755, ECC82, EL82, 6P15P-EV, 6N3P-DR, 6N3P, 6N2P-EV, 6N1P-EV, 6N6P etc. Please ask for more information by email. I'm going to list more matched tubes (Amplitrex AT1000) the next few coming months.