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Old 02-05-2013, 01:04 AM   #1
theonecalledjoe
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Unhappy My amp died! Help!

Hey guys.

After 2 years by beloved Blackheart Little Giant head has died.
Basically I had just finished up in the studio 2 days ago with my band (Bunderthird)
I went to turn the head back on 1 more time before i left to test out a cabnet and the head wouldn't power on. The light didn't turn on nor did it make any sound.

I looked in the back of the amp and noticed scorch marks on the power amp tube. (El84.)
So I'm assuming the power amp tube died? I bought the amp second hand and don't know how old the tubes are.
Or is it something different?
My friend who is doing the recording for us said i might have blown a fuse though. Is that the case? I have no idea how to really troubleshoot since this was my first tube amp.

If it is the tubes. Should i just replace them and be good to go?
and how would i go about doing that? What kinda tubes? etc.
Like if I were to buy another EL84. sayyyy a JJ or a EHX. Can i just put it right in myself? or do i have to take it to a shop?
Same with the preamp tube. (If i'm going to do a tube swap. I'm going to do both)

sorry for all the questions. Thanks ahead of time
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Old 02-05-2013, 01:34 AM   #2
Eppicurt
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If it's not powering on, sounds like a fuse.

New tubes would probably be an idea. Got any photos of the current tubes?
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Old 02-05-2013, 01:43 AM   #3
theonecalledjoe
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Not right now. But i can get some up soon. I'll probably take the chassis apart tomorrow.
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Old 02-05-2013, 02:25 AM   #4
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Originally Posted by Eppicurt
If it's not powering on, sounds like a fuse.

New tubes would probably be an idea. Got any photos of the current tubes?


x2. Sounds like the tube went bad and blew the fuse.
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Old 02-05-2013, 02:38 AM   #5
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Quote:
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x2. Sounds like the tube went bad and blew the fuse.


this.
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Old 02-05-2013, 03:22 AM   #6
theonecalledjoe
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oh. that sounds scary. Should i just take it into a shop and get it looked at?

or is this a repair i can do myself?
(I'm a complete n00b when it comes to this kinda stuff)
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Old 02-05-2013, 03:23 AM   #7
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also i believe the tubes are stock (and the amp was made in 2007). Which probably explains them blowing. I had been running that amp pretty hard all day, and that past week recording.
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Old 02-05-2013, 03:26 AM   #8
R45VT
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Quote:
Originally Posted by theonecalledjoe
oh. that sounds scary. Should i just take it into a shop and get it looked at?

or is this a repair i can do myself?
(I'm a complete n00b when it comes to this kinda stuff)


Replace the tube and the fuse. Make sure it isn't plugged in and you are set to change the tube and fuse.
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Old 02-05-2013, 03:54 AM   #9
theonecalledjoe
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So if i just buy another EL84 and a 250v fuse i should be good to go?
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Old 02-05-2013, 04:29 AM   #10
theonecalledjoe
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ok yeah. I took the tube out and its shot.
If I replace the EL84 and the 12AX7 with new tubes of the same type, to i have to get the amp re-biased?
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