Originally Posted by
zanash
1. New pair of 300b valves. One of the valves is coming apart. The quality of Golden Lion 300b valves is shocking. The pins gold plating very quickly scrapes away and one the things is excessive now slightly faulty, tapping it can get generate hum and a rustling noise through the right channel. I bought this pair second hand so I have no idea how many hours have been put on them. So I need a new pair. The 300b rabbit hole is a massive one. I might just get a pair and then at some point next year 2024 buy my ultimate buy and forget pair.
your rustling noise....is a dirty valve base and or valve pins. I used to suffer from this on my various valve amps. Stabliant 21a is an effective cleaner and contact enhancer, which cleared all my issues.
Good tip that Pete, I have some contact cleaner and feel some of my valve pins could do with a squirt!
Main system : VPI Scout 1.1 / JMW 9T / 2M Black / Croft 25R+ / Croft 7 / Heco Celan GT 702
Second System : Goldring Lenco GL75 / AT95EX / Pioneer SX590 / Spendor SP2