broken amp revived...now I feel dumb?

FuseG4

Our Neighbor Totoro
Like 6 months ago my Blackheart 5W combo developed a problem wherein it would play fine for like 5 min and then the volume/output would drop. sometimes it wouldn't drop quite as much but the preamp would distort like a fuzzy mess. sometimes, lightly pressing on the top of the chassis would correct the problem. sometimes it'd start up weak and pressing on it would kick in the normal vol.

Tubes were fine. Tried numerous times to pull out the chassis and check for loose connections or messed up parts. without a voltage meter or something I was basically lost.

There is a lack of amp techs and the warranty was out. so, i bought the head version of my amp. I used my old combo amp like an extension cab.

Ok so fast forward to like, an hour ago. In a flash of brilliance I thought that if pressing on the chassis just so would both cause and solve the problem, it had to be something just slightly loose. Caps, resistors, fuses, power transformers, those things probably don't let die and come back and die again when you press on them.

On a whim I take the volume knob off and check the nut... it's only finger tight so I tighten it. Problems still there. Treble pot... tighten... still cutting out. Mid pot. I press it hard up against the chassis, tighten the crap out of it, and...

YES! Amp works... I feel smart for fixing my amp. I feel dumb because my made in china amp basically just showed me just how made in china it really was. I feel dumb cuz I spent hours being pissed at an other wise good amp for a simple pot not being tighened at the factory. I feel dumb cuz now I have 2 basically identical amps and just one speaker...
 
Re: broken amp revived...now I feel dumb?

i guess...maybe I should just save my money and sell both and finance a Fender '65 DRRI
 
Re: broken amp revived...now I feel dumb?

I'm not sure what China has to do with this. Nuts work loose.

Aw, heck. Blame China anyway. I'm sure they've done far worse things that we are unaware of.
 
Re: broken amp revived...now I feel dumb?

like, the pot isn't wired to the circuit board. Its just presses the terminals up against terminals on the pcb. The loose nut meant that the connection wasn't secure.

It's something simple that could have been avoided with better parts, actual soldering or wires, and quality control.

I don't blame China, I blame loud technologies for cutting corners in general. people outsource to China to cut corners somewhere. Cheap parts and inexpensive labor, time saving stuff and mass production, that sort of thing.
 
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Re: broken amp revived...now I feel dumb?

like, the pot isn't wired to the circuit board. Its just presses the terminals up against terminals on the pcb. The loose nut meant that the connection wasn't secure.

It's something simple that could have been avoided with better parts, actual soldering or wires, and quality control.

I don't blame China, I blame loud technologies for cutting corners in general. people outsource to China to cut corners somewhere. Cheap parts and inexpensive labor, time saving stuff and mass production, that sort of thing.

Man, that's cheap of them!:poed::naughty:
 
Re: broken amp revived...now I feel dumb?

yeah it's gotta be some miracle of modern technology by which they made sound good. 'Cause it actually does sound good for the price. Way better than the VJ or the Crate V5. I think a good bit has to do with the full sized eminence.

cabinet rattles, especially when I hit F# on the low E. Is that normal?
 
Re: broken amp revived...now I feel dumb?

Loose nut on the pot? Maybe loose screw on the speaker.

LesStrat said:
Nuts work loose.
Oh, all the puns available here... decisions, decisions!
 
Re: broken amp revived...now I feel dumb?

no it was the pot... speaker ran fine when I ran the other amp head thru it
 
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