I have a Vox Valvetronix VT20+ amplifier. From the specs I read online it's a 20 watt solid state amp with 12AX7 vacuum tube. Recently I noticed that when I turn it on LEDs would immediately light up indicating na bukas na pero it takes about 3-5 seconds bago tumunog. Bale gradually lalakas siya hanggang sa maging normal na (3-5 seconds span). Medyo napraning lang ako kasi di ko maalala kung ganun ba talaga siya before.
Anyway my question is.. normal ba yun or sign na ba na dapat nang palitan yung vacuum tube? Also paano ba malalaman kung dapat na palitan ang tube ng amp? TIA sa sasagot hehe
Hi sir. I am no expert, but I think normal lang yan. I had a Marshall Valvestate before (tube pre amp - SS PA) and ganyan din. If I remember correctly you really have to give time for the tubes to heat up. If hindi uminit sa tamang level yan, dapat wala kang output na sound sa amp mo.
Marami signs na dapat palitan mo na ang tubes mo. In my case nagpalit ako ng tube dati kasi may squeal na ako na naririning.
Hope I was able to help. Good luck!