Warning! Warning!
Moderators: pompeiisneaks, Colossal
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skyboltone
- Posts: 2287
- Joined: Wed May 10, 2006 7:02 pm
- Location: Sparks, NV, where nowhere looks like home.
Warning! Warning!
When building for overseas change the MOV value!!!
The Last of the World's Great Human Beings
Seek immediate medical attention if you suddenly go either deaf or blind.
If you put the Federal Government in charge of the Sahara Desert, in five years time there would be a shortage of sand.
Seek immediate medical attention if you suddenly go either deaf or blind.
If you put the Federal Government in charge of the Sahara Desert, in five years time there would be a shortage of sand.
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Ron Worley
- Posts: 908
- Joined: Mon Dec 24, 2007 8:21 pm
- Location: Keller, TX
Re: Warning! Warning!
Yup, when I built an express for my mate Rob in the UK, I damn near forgot that......
Luckily, I was looking at the schematic and realized that there was more than a tranny change here!!
Ron
Luckily, I was looking at the schematic and realized that there was more than a tranny change here!!
Ron
Re: Warning! Warning!
Phhhhew!
I thought another storm was expected...
Major Twang
I thought another storm was expected...
Major Twang
Re: Warning! Warning!
Mov 
we don't need no steenking Mov ...........or do we?
Stew
we don't need no steenking Mov ...........or do we?Stew
Re: Warning! Warning!
I omitted it from my Express. It's there to clamp voltage spikes. None of my other amps have them. I think I'm going to be OK.
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skyboltone
- Posts: 2287
- Joined: Wed May 10, 2006 7:02 pm
- Location: Sparks, NV, where nowhere looks like home.
Re: Warning! Warning!
Shhhhhhh. This one ain't gettin one......
By the way, it ain't just smoke inside there. It went off like a firecracker with a ball a fire about an inch in diameter. Didn't touch the breaker or fuse.
By the way, it ain't just smoke inside there. It went off like a firecracker with a ball a fire about an inch in diameter. Didn't touch the breaker or fuse.
The Last of the World's Great Human Beings
Seek immediate medical attention if you suddenly go either deaf or blind.
If you put the Federal Government in charge of the Sahara Desert, in five years time there would be a shortage of sand.
Seek immediate medical attention if you suddenly go either deaf or blind.
If you put the Federal Government in charge of the Sahara Desert, in five years time there would be a shortage of sand.
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Luthierwnc
- Posts: 998
- Joined: Sat Feb 18, 2006 10:59 am
- Location: Asheville, NC
Re: Warning! Warning!
Hi Dan;
When I remember to put them in, I've used the red ones about the size of a nickel. 130 volts and I forget the joules. The schematics I was following were from the days when wall voltage was around 117. Anymore, my outlets are pushing 123. The tolerances on those units is 10% so they would be inside spec if they blew right now. I suppose we could go to the 140 size.
Also, have you ever seen a better design than just having the thing short the AC leads? The white wire is only to the breaker-box and back from true ground which is damn close to the shield on my guitar cord. Maybe a small, fast-blo fuse in series between an isolated input jack and ground? As far as I care, the trannie can fry so long as I'm not included.
Since I roll my own, I always put a parallel .001/500v cap and 220k resistor in series between the guitar jack ground and the bridge. I'm told it is enough to knock the B+ down to around 50 volts if the DC ever got on the jack. That from Adrian Legg's book.
Skip
When I remember to put them in, I've used the red ones about the size of a nickel. 130 volts and I forget the joules. The schematics I was following were from the days when wall voltage was around 117. Anymore, my outlets are pushing 123. The tolerances on those units is 10% so they would be inside spec if they blew right now. I suppose we could go to the 140 size.
Also, have you ever seen a better design than just having the thing short the AC leads? The white wire is only to the breaker-box and back from true ground which is damn close to the shield on my guitar cord. Maybe a small, fast-blo fuse in series between an isolated input jack and ground? As far as I care, the trannie can fry so long as I'm not included.
Since I roll my own, I always put a parallel .001/500v cap and 220k resistor in series between the guitar jack ground and the bridge. I'm told it is enough to knock the B+ down to around 50 volts if the DC ever got on the jack. That from Adrian Legg's book.
Skip