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Old 19th February 2008, 08:58 PM   #1
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Default help! no power, im lost

I am buiding a monoblock kit and i have checked all the connections, but I still have no power going through the unit. I can't even blow a fuse or anything. How/where do I start to trouble shoot. Here are some pics, most everything is soldered except where I had to extend some wires. The power switch and a few other things are just hanging out until I figure out what is going on. I do have a multimeter, but I'll i could figure out was that it was operating at 60 volts. Im new to this electrical stuff.

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Old 19th February 2008, 10:07 PM   #2
SY is offline SY  United States
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Start with the line plug (unplugged!). Using an ohmmeter or a continuity checker, connect between each power cord prong and the transformer primary (switch "on"). If you have continuity, you've got a transformer issue. If you don't, then leave the ohmmeter lead connected to the power cord prong and with the other lead, start working back to the power plug until you find where the connection is lost.
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Old 19th February 2008, 10:12 PM   #3
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I don't know what the issues is, but you need to put some rubber grommets in those holes as you have high voltage wires passing through holes in metal with sharp edges. Also, the fuse should be before the switch -- connected directly to the power inlet.
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Old 20th February 2008, 01:06 AM   #4
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guys at audiokarma said the same thing about rubber grommets, and I will put those in. right now there are NO nicks/cuts or anything on the wires coming through the holes.

im not sure I follow about the fuse, should it be in line coming from the EIC plug to the switch?
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Old 20th February 2008, 01:09 AM   #5
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maybe im explaining my problem wrong

i have 60 volts moving through the EIC plug. so there is power to the unit, but i don't know if its going anywhere from there.

I touched both ends of the fuse, and there is an ohm rating. does that mean anything?
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Old 20th February 2008, 01:31 AM   #6
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Default Check your connectors

Hi
So you have mains going into the transformer?
And voltage coming out?
I second dsavitsk in recommending grommets. I am sure i can see one of the black wires been stripped as its scraped along the hole...a disaster waiting to happen.
I am not perfect but I dont like those dreadful crimp connectors.. i prefer solder and heat shrink for all and often use 2 or 3 layers of heat shrink.
Again I do not mean to criticise but some of your solder joints may be dry by the look of them
Good luck
Take it easy play it safe and methodical (read the safety directions)
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Old 20th February 2008, 01:42 AM   #7
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Default Re: Check your connectors

Quote:
Originally posted by duderduderini
Hi
So you have mains going into the transformer?
And voltage coming out?
I second dsavitsk in recommending grommets. I am sure i can see one of the black wires been stripped as its scraped along the hole...a disaster waiting to happen.
I am not perfect but I dont like those dreadful crimp connectors.. i prefer solder and heat shrink for all and often use 2 or 3 layers of heat shrink.
Again I do not mean to criticise but some of your solder joints may be dry by the look of them
Good luck
Take it easy play it safe and methodical (read the safety directions)
Nick
one main from the transformer goes to the EIC, and the other to the fuse.

it must be completing a circuit because i show 60volts at all points along this path.

the wires are NOT scraped.... i will wrap them to be on the safe side until i find the grommets.

this is my first soldering job and i think my iron is way to weak, it takes forever to melt. Is there such thing as too much solder?? what does dry mean?
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Old 20th February 2008, 03:17 AM   #8
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Default Try this

Go to here it seems a decent site
http://www.instructables.com/id/How-to-solder/
When you say 60 volts.. whats the volts at the power point? what are the ratings of the transformer?
As i found out a good soldering iron is essential if you are going to do this more. 700 to 800 degrees tip temp with enough mass to sink heat into things you are soldering. Most irons are for solid state. For tubes think binford.
Good luck
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Old 20th February 2008, 03:27 AM   #9
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Default wiring in the fuse

Hi Again
Look at this post
http://www.diyaudio.com/forums/showthread/t-65709.html
post number 15
Hope this helps
Nick
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Old 20th February 2008, 03:29 AM   #10
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thanks for the link.......i think im using way to heavy solder for one thing.


as for the 60 volts... thats what is coming through the EIC, from my power cable.

i dont know how to tell what is coming out of the transformer
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