Picked up this Netgear Storage Central box at the Goodwill, thinking it would make a great NAS. It doesn't, it's a proprietary POS. But, in need of a power amp for the Luxman C-1000 pre, I thought it would be cool to do a Class-D build.
I've ordered a TA2022 board from China, and a 44VCT 80VA toroidal tranny from Apex Jr. Figure it's good for ~ 40Wpc, adequate power for my 87db efficiency speakers in a small listening room.
Question for the gurus: I want power it from one of the Luxman's switched power outlets, which of course means non-polarized, non-grounded power cord. I plan to use one of those nylon cord clamps in one of the square holes, an internal fuse, possibly a power switch, then wire to the Toroidal tranny. All connections to be heat-shrink protected. Every precaution to be taken to avoid the slightest possibility of a live wire shorting to the case. Am I nuts? Should I use a three-wire power cord, and just switch the thing separately?
I've ordered a TA2022 board from China, and a 44VCT 80VA toroidal tranny from Apex Jr. Figure it's good for ~ 40Wpc, adequate power for my 87db efficiency speakers in a small listening room.
Question for the gurus: I want power it from one of the Luxman's switched power outlets, which of course means non-polarized, non-grounded power cord. I plan to use one of those nylon cord clamps in one of the square holes, an internal fuse, possibly a power switch, then wire to the Toroidal tranny. All connections to be heat-shrink protected. Every precaution to be taken to avoid the slightest possibility of a live wire shorting to the case. Am I nuts? Should I use a three-wire power cord, and just switch the thing separately?
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.
I'm not going to tell you one way or the other, but I would personally be OK with no ground. Proceed at your own risk.
BTW, I would change out the bobbin inductors on that amp board. They are the wrong value; try to fit some ~11uH toroids in their place.
BTW, I would change out the bobbin inductors on that amp board. They are the wrong value; try to fit some ~11uH toroids in their place.
All my life I live without ground, since in this building we don't have it, and I am still here 😛
As long as you won't tuch the amp and some grounded part, you will be safe as with it
If you want to be on the safe side, you can do it the way it is normally done with a non grounded electrical appliance in a metal housing, make it double insulated (class 2 product).
That means that you have two (or one reinforced) layers of insulation between live parts and the metal housing.
That means that you have two (or one reinforced) layers of insulation between live parts and the metal housing.
Get a cheater plug adapter, connect it at the Luxman's switched power outlets.
Then run a separate Safety Ground wire from the adapter to the Luxman's chassis or to the power outlet.
Double insulated (class 2 product) are not for amateurs!
Then run a separate Safety Ground wire from the adapter to the Luxman's chassis or to the power outlet.
Double insulated (class 2 product) are not for amateurs!
Hey chicks,
Friend from over on AK. Always enjoy your GW/SA finds. Lucked out myself yesterday with a pair of large Advents(bad shape though) for $15. Lots of work! 🙁
Anyway... Curious how your DIY toaster T-amp project is coming along. I have one of those Netgear enclosures myself and have had nothing but trouble with it. Gave up on it years ago. Have since upgraded to their ReadyNAS Duo. Great idea to re-purpose the case for a small amp. Got any pictures?
Keep us posted.
Friend from over on AK. Always enjoy your GW/SA finds. Lucked out myself yesterday with a pair of large Advents(bad shape though) for $15. Lots of work! 🙁
Anyway... Curious how your DIY toaster T-amp project is coming along. I have one of those Netgear enclosures myself and have had nothing but trouble with it. Gave up on it years ago. Have since upgraded to their ReadyNAS Duo. Great idea to re-purpose the case for a small amp. Got any pictures?
Keep us posted.
Is that the reason the inductors on this board get so hot?
Can't hold on them long before it hurts.
Also 7805 regulator is hot. Regulator has a resistor to limit the voltage on my board, but piture in this thread shows a zener diode?
Anyways, cant seem to find much info on this particular board.
Jon
Went with another case, which worked for a while, but DIY work is never done. 😉 Found this case at the GW yesterday, works pretty well. No drilling for power cord or inputs/outputs.
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.
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