Armandearl
Hi Guys
I own a Laney Cub 12r tube amp. Its giving this annoying ringing sound when I play. It sounds like two petal plates vibrating against each other. I took it back and they said theres nothing they can do, its happens, its the valves vibrating yadayada. This is rubbish, it makes it unuseable seeing the ringing is loud enough to hear at almost all playing levels.
Is teher a way I can fix it and what should I do.
Jayhell
They should give you a new one, as far as I know it shouldn't do that. You paid for a quality product, they should give you one. This is sad because this amp is on the top of my wish list ☹.
Any one else has this problem with their cubs?
AlanRatcliffe
Valves do go bad quickly on occasion - sometimes right out the box. How old is it and where did you buy it from? There is usually a three month warrantee on valves, so if it's a new amp, they should replace the faulty valve (at the distributor's expense, so it's no skin off the store's nose).
What you have is a microphonic valve. To identify the culprit tap each one with a pencil or pen until you find the one that rings. If it's one of the three 12AX7s, simply pull the old one and replace. If it's one of the EL84 power valves, both will need replacing with a matched pair - but no other biasing or anything is needed, so you can do it yourself.
Armandearl
Thanks
I bought it last year December. I just got the feeling that either the shop or the supplier doesn't want to help.
I'll check out the valves as you discribed, I hope thats the problem.
