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Old 14th April 2012, 12:59 PM   #31
AndrewT is offline AndrewT  Scotland
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I did in post4.

We now have three of those questions answered and just three more to go.
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Old 14th April 2012, 01:00 PM   #32
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I've applied a good practical test and included the relevant safety warnings.

No guess work - just a simple test that the average guy can carry out.
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Old 15th April 2012, 12:14 AM   #33
AJT is offline AJT  Philippines
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Quote:
Originally Posted by KatieandDad
it is the thickness of the secondary winding that really determines the (max) output current.
Quote:
it is the thickness of the primary winding that determines the maximum input current.
Both limiting values must not be exceeded for continuous operation.
both primary and secondary resistance have an effect...but the thing that limits how much power can be drawn out from secondary terminals is temperature and insulation qualities of the traffo, how hot are you willing to go? how high will the temperature be before insulation of wires and bobbins start to burn out or melt?
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Old 15th April 2012, 12:24 AM   #34
AJT is offline AJT  Philippines
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Quote:
Originally Posted by MrAdel1984 View Post
Hi guys

Sorry for late response and thanks for help
The trafo is -thank god- still alive and it's an E-I ,secondary wire diameter is about 0.5 mm, primary (couldn't see it)
Any Way , Trafo manufacturers in my country don't give a damn about amperage

Thanks
0.5mm is american ga#24, i would normally use that wire for 0.5 to 0.8 amps in my traffos....gainclones have huge psrr's that the dc resistance of your traffo hardly matters....

so the 4amp spec quoted to you is a joke.....

if you want to use it for a gain clone, you can, the voltage will sag big anyway...your unloaded rails will be +/-40 volts......

for an lm3886:
Supply Voltage |V+|+|V−|
(No Signal) 94V
Supply Voltage |V+|+|V−|
(Input Signal) 84V
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Old 15th April 2012, 09:57 AM   #35
godfrey is offline godfrey  South Africa
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Sheesh, are you guys still arguing about this?
Normal people could've built the amp finished by now.
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