Help Marshall Jcm 2000 dsl 401 Combo

[crashnburnuk]

Hi , I have just bougt a Marshall Jcm 2000 dsl 401 Combo problem is when it has been on a while (about 30min) i get this hissing coming from the amp which disappears when i hold the strings or play....what could this be?

i purchased it brand new and i use it with my fender lite ash strat.

this is my first valve amp if this is normal please dont laugh at me just its strange how its fine for the first 30min or so.

ps i am aware there is a design fault on the amp leading to overheating but i dont think this is a contributing fact as the amp feels relativley cool when it occurs.

cheers any help appreciated.

[GreenThing]

I have a TSL100, and there is a wery quiet hiss. However, if the problem goes away when you tough the strings, then it sounds like a sheilding problem with your guitar. I use a mexican tele and it is somthing I have to put up with.

[crashnburnuk]

Great thanks sounds about right im using a lite ash strat
thanks for your help

[GreenThing]

Nice amp by the way. In my eyes, you cant beat that Marshall crunch.