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Chip Amps Amplifiers based on integrated circuits

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Old 3rd December 2012, 11:08 PM   #2271
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@ Einric: Looks very smart. What is the wood? Do you have an image with the lid on.
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Old 4th December 2012, 12:56 AM   #2272
Einric is offline Einric  United States
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The wood is Hickory flooring with 2 coats of Birchwood Casey Grain Filler and 2 coats of Birchwood Casey Gunstock Wax.

The top is clear plexi, I installed a 10mcd Red LED on the bottom of the PS with 2kΩ resistor on top, you can see the 4 stack of 8.2kΩ resistors in the middle of the PS.
The LED reflects off of the diamond plate concealed by the Toroid for just enough glow to indicate it's on.
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Old 4th December 2012, 01:01 AM   #2273
Einric is offline Einric  United States
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Thank You All BTW for the kind words.
I put about 8 hours into this last Saturday to finish it up.
I had the worst headache I have EVER had (worse than a hangover) with blurry vision and everything after being hunched over the kitchen table that long.

The nice thing about the finish I chose is that I went from plain wood to semi-gloss in 2 hours.

Here is a shot of the wood before the finish.
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Old 4th December 2012, 02:30 AM   #2274
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small comment about the caps you have mounted upside down: you have blocked their expansion vents. probably not the best idea, really.
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Old 4th December 2012, 02:51 AM   #2275
Einric is offline Einric  United States
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They are Panasonic TS-HA's there are no "vents".
There is a bit of hot glue placed dead center on the bottom and a bit more than that dead center between them holding the power links going to the amps.
Both are placed on a high spot on the diamond plate tread to give airflow to the underside.

The Panasonic FC's that are on the amp boards are actually floating about .5mm above the bottom with a small dab of hot glue on the outside edge of one of them for stability.
The lead end of them has a rubber vent buffer built in for proper spacing.

Last edited by Einric; 4th December 2012 at 02:59 AM.
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Old 4th December 2012, 02:59 AM   #2276
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Quote:
Originally Posted by Einric View Post
They are Panasonic TS-HA's there are no "vents".
There is a bit of hot glue placed dead center on the bottom and a bit more than that dead center between them holding the power links going to the amps.
Both are placed on a high spot on the diamond plate tread to give airflow to the underside.
The caps are fine that way, I would just get the voltages from the end of caps not from middle (power supply). also Why do you have so many wires coming out from power supply?
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Old 4th December 2012, 03:15 AM   #2277
Einric is offline Einric  United States
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The 4 large caps use 14awg solid black & red for the inputs on the bottom of the PS board.
The voltage outputs (blue & green) go down to a barrier strip.
The amp power outputs come from the other side of the barrier strip with the "clear" jacket wire.
They merely pass at 90 degrees at the middle of the "bulk" supply capacitors.
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Old 4th December 2012, 04:03 AM   #2278
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Quote:
Originally Posted by Einric View Post
The 4 large caps use 14awg solid black & red for the inputs on the bottom of the PS board.
The voltage outputs (blue & green) go down to a barrier strip.
The amp power outputs come from the other side of the barrier strip with the "clear" jacket wire.
They merely pass at 90 degrees at the middle of the "bulk" supply capacitors.
ok, check with an ohmmeter in continuity mode, check PG- PG+ CHG, you will see that all of them are one connection.
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Old 4th December 2012, 04:21 AM   #2279
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Quote:
Originally Posted by Einric View Post
The wood is Hickory flooring with 2 coats of Birchwood Casey Grain Filler and 2 coats of Birchwood Casey Gunstock Wax.

The top is clear plexi, I installed a 10mcd Red LED on the bottom of the PS with 2kΩ resistor on top, you can see the 4 stack of 8.2kΩ resistors in the middle of the PS.
The LED reflects off of the diamond plate concealed by the Toroid for just enough glow to indicate it's on.
Mate didn't see the perspex. I suppose that's the aim. Yes good work and I like that little bit of timber in every build. Or something that just makes a build standout a little.

I have those modules and wired them parallel also. But I have done nothing with mine.
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Old 4th December 2012, 12:16 PM   #2280
Einric is offline Einric  United States
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There should not be continuity from PG+ to PG-.
There are two separate diode bridges and two separate secondaries on the transformer.
:Edit: I see what you are saying the PG+ & PG- share a plane on the amp board.

I will do some more listening tonight but so far I do notice quite a bit more punch in the kick drum over the single chip stereo version.

Last edited by Einric; 4th December 2012 at 12:18 PM.
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