Marshall 800 Noise
- Thread starter LazNovak
- Start date
Shooter.556
New member
Re: Marshall 800 Noise
Yes.. Check the power tubes.. It may only work til that tube gets hot and the plates short out.
I agree with everyone here, check your tubes and repair them before you burn up a transformer or fry a tube socket.
Question? Did you discharge the tubes and check the sockets and if they were seated properly?
I vaguely remember you saying something about this being shipped and just getting it?
I'd unplug it and discharge the caps and check your tubes and tube sockets. If you are uncomfortable doing this take it to a pro because it will knock your dick in the dirt if you don't discharge the stored energy in the caps. It hurts, I have felt it first hand lol!
I'm thinking a bad power tube or a loose connection.
Yes.. Check the power tubes.. It may only work til that tube gets hot and the plates short out.
I agree with everyone here, check your tubes and repair them before you burn up a transformer or fry a tube socket.
Question? Did you discharge the tubes and check the sockets and if they were seated properly?
I vaguely remember you saying something about this being shipped and just getting it?
I'd unplug it and discharge the caps and check your tubes and tube sockets. If you are uncomfortable doing this take it to a pro because it will knock your dick in the dirt if you don't discharge the stored energy in the caps. It hurts, I have felt it first hand lol!
I'm thinking a bad power tube or a loose connection.
LazNovak
New member
Re: Marshall 800 Noise
I'm not the guy who had the amp shipped. I took the amp to rehearsal one day and when I got there the fuse was blown. Something happened on the way there. Bumpy ride?
I can take it to my tech. I've never worked on amps and don't want any problems.
Thanks for the reply!
I'm not the guy who had the amp shipped. I took the amp to rehearsal one day and when I got there the fuse was blown. Something happened on the way there. Bumpy ride?
I can take it to my tech. I've never worked on amps and don't want any problems.
Thanks for the reply!
Shooter.556
New member
Re: Marshall 800 Noise
We got a run on Marshall's makin weird noises in the Duncan forum lol!
It doesn't sound too serious, it should be not to costly fix.
Now problem bro..
We got a run on Marshall's makin weird noises in the Duncan forum lol!
It doesn't sound too serious, it should be not to costly fix.
Re: Marshall 800 Noise
Fuses are unlikely to blow from handling in transit, they're very durable, especially the "automotive style" that is used in amps... it's more likely something else got rattled loose (like a tube, etc...) And when you plugged it in and fired it up it blew the fuse...
Fuses are unlikely to blow from handling in transit, they're very durable, especially the "automotive style" that is used in amps... it's more likely something else got rattled loose (like a tube, etc...) And when you plugged it in and fired it up it blew the fuse...
Gearjoneser
Gear Ho
Re: Marshall 800 Noise
Before you spend any money on a tech, install a new set of power tubes. If the problem persists after that, then take it to a tech.
Before you spend any money on a tech, install a new set of power tubes. If the problem persists after that, then take it to a tech.
LazNovak
New member
Chickenwings
Alnico 6/8
Re: Marshall 800 Noise
)
+1
Yeah new tube should get a rebias to work at their optimum, but biasing is a range and youll find that you can just chuck in a new set and they will work fine (as long as they are the same type of tube
)
Shooter.556
New member
Re: Marshall 800 Noise
Yes, always check the bias on power tubes. Pre amp tubes don't have a bias but you need to set proper voltage in the power section for optimal performance and tube life.
Yes, always check the bias on power tubes. Pre amp tubes don't have a bias but you need to set proper voltage in the power section for optimal performance and tube life.
dystrust
Well-known member
Re: Marshall 800 Noise
While it's true that power tubes need to be properly biased to work and last their best, the amp should still work (but maybe not sound its best) if you just swap tubes without a rebias. The idea here is to get through your gig or rehearsal (or test the amp) and then have your tech bias it later.
+1
Yeah new tube should get a rebias to work at their optimum, but biasing is a range and youll find that you can just chuck in a new set and they will work fine (as long as they are the same type of tube
While it's true that power tubes need to be properly biased to work and last their best, the amp should still work (but maybe not sound its best) if you just swap tubes without a rebias. The idea here is to get through your gig or rehearsal (or test the amp) and then have your tech bias it later.
LazNovak
New member
Re: Marshall 800 Noise
I have some kind of JJ's in there now so I'll just get another set of those and see what happens.
Ok, thanks!
I have some kind of JJ's in there now so I'll just get another set of those and see what happens.
LazNovak
New member
Re: Marshall 800 Noise
By the way.
Which tubes would you guys say would work better to get a fat, thick metal tone?
http://www.thetubestore.com/Tubes/EL34-6CA7-Tube-Types/JJ-6CA7
or
http://www.thetubestore.com/Tubes/EL34-6CA7-Tube-Types/JJ-E34L-EL34
By the way.
Which tubes would you guys say would work better to get a fat, thick metal tone?
http://www.thetubestore.com/Tubes/EL34-6CA7-Tube-Types/JJ-6CA7
or
http://www.thetubestore.com/Tubes/EL34-6CA7-Tube-Types/JJ-E34L-EL34
dystrust
Well-known member
Re: Marshall 800 Noise
Generally speaking, 6CA7s tend to be 'fatter' sounding than EL-34s. I don't have a ton of experience with them, so I can't really go into more detail than that.
Generally speaking, 6CA7s tend to be 'fatter' sounding than EL-34s. I don't have a ton of experience with them, so I can't really go into more detail than that.
