Need Help With Valves/Tubes

xanderwoods · #1 11-03-2011, 03:50 PM

okay, im quite new to the whole bass scene, and i have a ampeg ba112, and it seems the tube/valve in the amp has blown. i need to know what i need to do to repair it, or what type i need to buy to replace. cheers

Sifl · #2 11-03-2011, 03:52 PM

I don't think that particular amp has tubes.

BurningSkies · #3 11-03-2011, 03:54 PM

Quote:

Originally Posted by xanderwoods

okay, im quite new to the whole bass scene, and i have a ampeg ba112, and it seems the tube/valve in the amp has blown. i need to know what i need to do to repair it, or what type i need to buy to replace. cheers

You need to find a qualified amp tech. Especially since the BA112 is a solid state amp, not a tube amp.

Alex1984 · #4 11-03-2011, 03:55 PM

What kind of sounds are you hearing that'd make you think something's wrong?

xanderwoods · #5 11-03-2011, 03:57 PM

then what could be wrong with my amp? i turned off my amp and turned it on again quickly (dont ask me why) and it just poped, turned itself off, and wont turn on again! whats wrong with it, and how do i repair this???

BurningSkies · #6 11-03-2011, 04:00 PM

Quote:

Originally Posted by xanderwoods

then what could be wrong with my amp? i turned off my amp and turned it on again quickly (dont ask me why) and it just poped, turned itself off, and wont turn on again! whats wrong with it, and how do i repair this???

No one can trouble shoot the amp without having in front of them. There are a number of reasons that might cause an amp to shut itself down. I'm going to suggest that you should consider this amp to not have any user-serviceable parts in it, unless I'm misreading your technical abilities. At the very best, you wont' be able to spot what's wrong, or you might cause more damage than good...at the very worst, you could hurt yourself by prodding about inside the amp.

Edit: If your amp has an external fuse, then it would be entirely reasonable to check it and replace it if needed.

xanderwoods · #7 11-03-2011, 04:03 PM

ive tryed multiple kettle leads with different external fuses incase the fuse has just simply blown, and still it doesnt turn on :/ if i took it to my local music store, could they have a look at it and examine the issue?

BurningSkies · #8 11-03-2011, 04:07 PM

Quote:

Originally Posted by xanderwoods

ive tryed multiple kettle leads with different external fuses incase the fuse has just simply blown, and still it doesnt turn on :/ if i took it to my local music store, could they have a look at it and examine the issue?

If they have a repair person. Not all shops do. Some may have someone they send it out to instead as an option. Depending on where you live (hint:Fill out your profile), you should be able to look up someone who's qualified to fix amplifiers or at least can tell you what's going on.

Remember, don't poke around in electronics if you're not qualified. Capacitors can store enough electricity to kill you, even when an amp is unplugged.

slawie · #9 11-03-2011, 04:11 PM

More than likely you have blown the fuse.
My understanding is that there is a 2A Slo-Blo (120V) fuse which may need to be replaced.
Sometimes by switching off and on the result causes high inrush current thereby
causing the fuse to blow.
I have just had a look at the schematic for the amp and the circuitboard layout and there
is a fuse located on the PCB itself.
Given your technical expertise (or lack thereof) I would advise against replacing the fuse DIY, as they say
in Germany "Nicht einer finger gerpoken"
You may void your warranty or worse still get a belt from it.
Find a tech, if it is the fuse it should not cost that much to replace.
slawie

Alex1984 · #10 11-03-2011, 04:56 PM

Hope your amp is still under warranty.