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Old 14th July 2008, 03:42 PM   #11
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The fun part is that the PSU is just slided into the chasis. A few screws and on you go.
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Old 14th July 2008, 03:46 PM   #12
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Old 14th July 2008, 03:59 PM   #13
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Extremely clean build, wow something to learn. thanks
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Old 14th July 2008, 04:53 PM   #14
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The audio-porn on demand channel, my kind of thing.
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Old 18th July 2008, 12:18 AM   #15
Serge66 is offline Serge66  Switzerland
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Hi Gema,

Congratulations! Very nice work.
I am jealous.

I would like to mention two points:

make sure the Faston connectors are very tight on the rectifier lugs.
If loose, the resistance increases and that will lead to a hot spot/connection. I experienced that in one of my amps. I then soldered the wires straight to the rectifier lugs.

Power resistors should be mounted above the pcb. A gap between 0.25 and 0.5 inch (5-10mm) helps the cooling and will prevent damage to the pcb if the resistor gets very hot. Burnt pcb smells foul. Burnt pcb also becomes porous and moisture can create a path between tracks and pads and create havoc with signals and power supplies.

Enjoy your amp.

I am now surrounded by autistic people drooling on their mobile phones, tablets... sad
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Old 18th July 2008, 12:24 AM   #16
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An extremely nice looking amplifier.

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Old 23rd July 2008, 07:58 AM   #17
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Location: Europe, Slovenia
Maybe this little thing will help someone.
I don’t like trimmers of any kind, so in this project I came across a solution for fitting resistors that may be easily swapped with resistors with different values. The catch is in the pins taken from DIL IC sockets.
Click the image to open in full size.
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Old 23rd July 2008, 09:22 AM   #18
Peppe is offline Peppe  Italy
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Location: Naples
When you find your value, do you solder the resistor on the catch or not?
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Old 23rd July 2008, 09:53 AM   #19
AndrewT is offline AndrewT  Scotland
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Location: Scottish Borders
Nice job Gema.

What is the band around the toroid made from?
regards Andrew T.
Sent from my desktop computer using a keyboard
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Old 24th July 2008, 06:34 AM   #20
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no need to; the DIL pin grasps the resistor's leg quite firmly

toroidal transformers are wound with feromagnetic tin to minimize magnetic field dissipation
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