LSC
524 posts
Oct 24, 2013
8:56 PM
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A little help from any of you tech guys. My little Newcomb sent up smoke signals the other day as it was dying. No warning. I took a look at the wiring and saw a bit of discoloration on the board but no obvious melting or burnt anything. I read somewhere that a power tube failing can cause rather dramatic things. Is that possible and if so would there be any harm in swapping tubes to see if that was the fault? Just trying to avoid a bill simce I just put some money into it having the in/outs converted.
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LSC
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Rick Davis
2591 posts
Oct 24, 2013
9:02 PM
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Sorry, I don't know what happened to your amp. Is it a Newcomb E-10B? I owned one and freaking loved it.
And yes... a power tube failing can be pretty dang theatrical. The first thing I would do is check the fuse and then try another power tube.
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-Little Rick Davis
The Blues Harp Amps Blog
The Mile High Blues Society
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jbone
1390 posts
Oct 25, 2013
4:46 AM
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First thing I would do is bite the bullet and take it back to whoever worked on it last if possible. It may be something they did is at fault here but regardless, I always have a pro look at my amps. Electricity can injure or kill in an instant and throwing parts at an electrical issue can only waste more good parts.
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LSC
525 posts
Oct 25, 2013
10:38 AM
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Thanks Rick. That's what I needed to know. The fuse didn't blow and yes it is a Newcomb - 10 something - I don't have it in front of me to check the actual model.
@jbone- If the power tube swap doesn't work I will take it back to the guy who worked on it. I don't know much about electronics so I usually have a tech work on anything but I can manage swapping some tubes.
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LSC
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TheATL
64 posts
Oct 25, 2013
2:33 PM
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LSC,
If you actually smelled smoke, I would not advise swapping tubes. The smell did not come from a tube, it came from some part overheating, most likely to the point of destruction. Until that part is replaced, there is a chance that putting a new tube in the amp could ruin a perfectly good tube. I would take it to a tech if you are not electronically inclined.
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LSC
526 posts
Oct 25, 2013
5:00 PM
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I didn't smell smoke so much as see it. About what you'd see from a cigarette in an ashtray.
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LSC
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TheATL
69 posts
Oct 25, 2013
6:20 PM
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Electronics work using magic smoke. When they make the parts they put a little smoke inside. If the smoke gets out, your screwed.
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