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 Post subject: amp smoking....
PostPosted: Sat Oct 30, 2010 9:25 pm 
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Joined: Tue Dec 21, 2004 6:30 pm
Posts: 1765
Location: Central Iowa
so I just got done building a bass for my son... Teisco-like body and mismatched neck, but came together okay mostly... at least for his use :)

anyway, I had a little Lyon (By Washburn) 15 amp practice amp, that I bough new a couple years ago... had not had much use prior to tonight... just to see if it worked basically.... tonight, I got it set up in his room, and started playing his bass through it, it developed a hum, and smoke started pouring out of the headphone jack... I guess you get what you pay for... I thought maybe since it was "by Washburn" it might be okay... darn... $15 down the drain.... :rofl:

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 Post subject: Re: amp smoking....
PostPosted: Sat Nov 06, 2010 5:25 am 
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Joined: Mon Feb 18, 2008 6:51 pm
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It would be worth $15 just to see that! Too bad you didn't get a video of it for YouTube.... My fender SCXD went 'up in smoke'.....but that was a $300 amp (fortunately it was under warranty). I've heard of amps catching on fire,etc....anybody else have any such stories?


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 Post subject: Re: amp smoking....
PostPosted: Sat Nov 06, 2010 1:34 pm 
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Joined: Thu Feb 07, 2008 5:52 am
Posts: 1924
Location: Ann Arbor, Michigan
Blown a few fuses in my day, but never smoked an amp. I do recall our Bus ignition catching fire on the way to a gig once, does that count? It's always a bad sign when you look out the window to see the Driver standing there coughing, and the bus is still rolling! Our sound guy was a mechanic, and we ended up replacing the feed wires to the ignition there on the side of the highway, and still made it to the gig on time, ah the 80's... Mike.

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 Post subject: Re: amp smoking....
PostPosted: Sat Nov 06, 2010 2:06 pm 
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Joined: Tue Dec 21, 2004 6:30 pm
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Location: Central Iowa
I picked up a Crate amp off ebay cheap...
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 0579954366

I'll have to get a pic of the Lyons amp next to it :rofl:

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 Post subject: Re: amp smoking....
PostPosted: Sat Nov 06, 2010 2:57 pm 
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Joined: Sat Dec 05, 2009 1:21 pm
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Location: south o' St.Louie,home of SLM
I believe there is a video out there of Johnny Winter playing(unaware) as his Musicman amp bursts into flames behind him :eek2: ....
I'll see if I can find it,too cool... Joe :oops:

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 Post subject: Re: amp smoking....
PostPosted: Sat Nov 06, 2010 4:39 pm 
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Joined: Mon Feb 18, 2008 6:51 pm
Posts: 237
I've got a little Crate bass amp - I think it's the bt-25.....was a good value...


Last edited by JMM on Sun May 22, 2011 12:16 pm, edited 1 time in total.

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 Post subject: Re: amp smoking....
PostPosted: Sun Nov 07, 2010 7:55 am 
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Joined: Wed Nov 19, 2003 4:58 am
Posts: 925
Location: Southern Indiana
unfortunately, I have seen way too many amps burn and smoke.

I fixed an Ampeg VL series tube amp, one of the Lee Jackson ones - that was completely charred. Apparently someone thought it was OK to put a large fuse in there when the small one blew, so the amp basically became the fuse. I told the guy - too expensive to fix - and sent it back to him and threw him a figure of $400-500. At that time that was about what one went for. I didn't think he would even think about fixing it. So he came back and said to fix it - he really liked that amp. The whole power section was charcoal.

I couldn' t get parts for it as I recall. So I used a schematic and hand wired that board running jumpers to the other boards. After making about half the amp a point-to-point amp, I fired it up. It crackled like crazy. It seems the offending smoke deposited conductive residue on all the other boards. I removed every board and used some wicked cleaner (electric motor/brake clean type stuff) and brush and cleaned everything. After all of this it sounded AMAZING.

I learned another lesson. Don't throw a stupid price at something in hopes that someone will not bite. He did. Next lesson was get that money in advance. After all that, he never paid for it or picked it up. I eventually had to sell it and the guy that bought it could not be happier. It really DID sound great.

I will see if I can find a post a picture of that char-broiled amp. I know I have one somewhere.

Here it is:
http://picasaweb.google.com/lh/photo/z0j61umrvHKP2ByD9WyMIZvkrRqZx4g57q_KASIi5Ac?feat=directlink

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 Post subject: Re: amp smoking....
PostPosted: Sun Nov 07, 2010 8:50 am 
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Location: Tifton, Ga USA
What a mess indeed. Amazing that you were able to get it in working order again. :up:

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 Post subject: Re: amp smoking....
PostPosted: Tue Nov 09, 2010 11:49 pm 
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Joined: Tue Dec 21, 2004 6:30 pm
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Location: Central Iowa
I pulled the unit apart, but can't see any signs of burning. all the components look okay. I think I'll need to plug a bass into it, and see if it starts smoking again... the fuse on the board is okay too....

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 Post subject: Re: amp smoking....
PostPosted: Wed Nov 10, 2010 9:25 am 
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Joined: Wed Nov 19, 2003 4:58 am
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Location: Southern Indiana
If you can do so while it is "open" great. Sometimes you can't, but if you can you may be able so see where the smoke is coming from. A variac with an amp meter inline is a good thing too - you can see if it starts to dump current and shut it down before the magic smoke all disappears.

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 Post subject: Re: amp smoking....
PostPosted: Thu Nov 11, 2010 11:39 am 
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Joined: Tue Dec 21, 2004 6:30 pm
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Location: Central Iowa
well, I pulled the board out to inspect closer, and the wafer board material was consistent with a $15 amp :-? I snapped a chunk right off... :rofl:
so I just finished "parting it out" the metal grill might fit on the crate, at least to protect the speaker a little bit.... I never did see anything on the board that was burnt or even that has signs of being hot.... I thought maybe I had done something really strange with the bass wiring, but it's been fine in the Crate and my Orange amp...

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