AmpTalk.com Forum Index AmpTalk.com
Amplifier Forum
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Diagnosis help-blowing preamp fuse



 
Post new topic   Reply to topic    AmpTalk.com Forum Index -> British Amps
Author Message
billyshakes
Newbie Alert
Newbie Alert



Joined: 30 Jul 2006
Posts: 1


PostPosted: Sun Jul 30, 2006 4:20 am    Post subject: Diagnosis help-blowing preamp fuse Reply with quote

Hello,
My name is Bill and I'm new to the board. I live in Germany but am a U.S guy (i.e. 120V electricity).

I bought a Marshall DSL50W head a few years back. I had hardly played it so I decided to sell the thing. I had a guy drive up about 2 hrs to see it. While I was checking it out making sure it was still working fine...I commited the unexcusable error of plugging it into a transformer that was too small (I was thinking 75W transformer would be enough for my 50W head....oops...50W equals output, not the 175W input required).

Anyway, I turned it on to let the tubes warm for a few minutes but when I flipped the Standby to on, I heard a pop and then no sound. I checked the back and it was a blown preamp fuse. Long story short, I had no replacements and the guy had a long drive home empty handed.

Anyway, I have bought the proper fuses and tried to replace them but now, I get a similar thing. I warm the tubes for a few minutes, (using a proper transformer of 300W capable) and when I flip on the Stanby switch, I hear a loud audible pop and then no sound. The Power switch still glows but no sound from my guitar through the speaker.

No guitar shop over here will touch it because it isn't 220V. Can anyone help with the diagnosis? Could this be a blown pre-amp tube/valve? Could it be worse? Are tubes dependant on input voltage? (i.e. is there a difference between tubes for 220 V[Europe] and 110V[U.S.]. Is it easy to change a tube by ones self? I don't want to fry myself on any capacitors.

Thanks for any help you can give as I'm a bit on my own with this.
Bill
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    AmpTalk.com Forum Index -> British Amps All times are GMT - 8 Hours
Page 1 of 1

 

© 2001-2007