My first project
Hello guys. There is some very nice work on here! I got the diy audio bug and decided to build a Gainclone as my first serious project. I chose the LM3886 from chipamp.com.
The case was made from .250 inch thick aircraft grade aluminum. The transformer cover was turned from T6 6061 aluminum. The sides are then covered with .750 thick red oak with a cherry stain. I machined the isolating feet from a bronze/copper alloy. The heatsink is machined from solid copper. The volume knob I cut from acrylic and then glass bead blasted for a frosted look.
I need to tidy up the wires still but overall I am happy with how it turned out.
I owe a huge thanks to everyone here for my inspiration!
Hello guys. There is some very nice work on here! I got the diy audio bug and decided to build a Gainclone as my first serious project. I chose the LM3886 from chipamp.com.
The case was made from .250 inch thick aircraft grade aluminum. The transformer cover was turned from T6 6061 aluminum. The sides are then covered with .750 thick red oak with a cherry stain. I machined the isolating feet from a bronze/copper alloy. The heatsink is machined from solid copper. The volume knob I cut from acrylic and then glass bead blasted for a frosted look.
I need to tidy up the wires still but overall I am happy with how it turned out.
I owe a huge thanks to everyone here for my inspiration!
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Hi Mud,
First.. thats awesome. I am really impressed!
Second I worry that you have made a shorted turn on your transformer and you will heat that sucker up. If you have a metal case for the transformer that touches a metal floor and then the metal bolt through the center you have created another turn on the transformer but its a never-ending turn.
Uriah
First.. thats awesome. I am really impressed!
Second I worry that you have made a shorted turn on your transformer and you will heat that sucker up. If you have a metal case for the transformer that touches a metal floor and then the metal bolt through the center you have created another turn on the transformer but its a never-ending turn.
Uriah
Thank you for the compliments! The transformer does not touch anything metal. It sits on 1/4" rubber and the bolt going thru center rest on a rubber washer as well. Is this not ok?
I was under the impression this was fine as long as everything was insulated. I have left the amp powered on for several hours at a time and no heat what so ever is generated from the torroid.
I was under the impression this was fine as long as everything was insulated. I have left the amp powered on for several hours at a time and no heat what so ever is generated from the torroid.
It doesn't matter whether the transformer is insulated, rather it depends if there is a current loop around the transformer formed by the shield/bolt/case combination. If you just hold a closed loop of wire around a toroidal transformer, a current will flow. If you are sure the bolt doesn't make electrical contact with the case, you should be fine.
It looks like you have a non-conducting/insulating lid on the amplifier.
It also looks like you have a support between the retaining plate and your lid.
NO PROBLEM.
But if you change the lid to conducting material then that support must be changed to non-conducting. Otherwise the metal support could make the shorted turn.
It also looks like you have a support between the retaining plate and your lid.
NO PROBLEM.
But if you change the lid to conducting material then that support must be changed to non-conducting. Otherwise the metal support could make the shorted turn.
Truly pretty feet, love the personalised creativity bug.
Sunk-in back and front panels ? Too much time on your hands ?
(daddy P is a good instruction manual for neat wiring)
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Torrence... AndrewT....
Thank you for making the transformer issue a little more clear. I think I will make a new cover out of a plastic just to be sure. The bolt is insulated from the case and yes the top of the case is acrylic.
Jacco... I built the amp over the course of several months. Even though this was my first serious audio project, I took my time to try to and make the amp look as good as it sounds.
Thank you for making the transformer issue a little more clear. I think I will make a new cover out of a plastic just to be sure. The bolt is insulated from the case and yes the top of the case is acrylic.
Jacco... I built the amp over the course of several months. Even though this was my first serious audio project, I took my time to try to and make the amp look as good as it sounds.
Thank you very much. This is the next project to be done offline.love it!
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Truly pretty feet, love the personalised creativity bug.
Sunk-in back and front panels ? Too much time on your hands ?
(daddy P is a good instruction manual for neat wiring)
jacco, can you clarify this comment? What is daddy P?
Looks very nice.
Can't see any openings for air flow. I hope you are not relying purley on radiation and conduction to move the heat out from the chassis
Thank you very much
I'm do it , because I like wich wood.
Buttons adjust the tamarind wood .
Near finished now.
when finished , I'm show picture agian
The language used .. may not be quite.
About language, I 'm not good
I use google help
Thank you very much. agian
I'm do it , because I like wich wood.
Buttons adjust the tamarind wood .
Near finished now.
when finished , I'm show picture agian
The language used .. may not be quite.
About language, I 'm not good
I use google help
Thank you very much. agian
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LM3886I understand what you are saying
One question... why are you using LM3886, and not LM3875?
Easy to buy in Thailand
And I need a higher power.
In a call - out.
I use the bare wire of 99.99% silver.
To increase transparency Of music
Now complete.
Add new photos soon.
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Hello everybody,
This is my new system. LME49830 + MOSFET output stage. MOS PA.
This is my new system. LME49830 + MOSFET output stage. MOS PA.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
