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Old 7th September 2011, 06:01 PM   #11
Stealth is offline Stealth  Slovakia
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Quote:
Originally Posted by epilot View Post
Hi guys,

Sorry but can Anybody experted in the field give me a good decent PCB recommendation based up on the schematic of LM3886 in the page NO1 of its datasheet?

Thanks a bunch
QRP01 The Gainclone - high performance power amplifier
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Old 7th September 2011, 06:09 PM   #12
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Hi,
I have spare pcb board for the LM3886 already assembly with components. The two LM3886 chip are not included. The board have all the extra components included in the circuit. Also the board have built in voltage regulator to adjust the -/+ voltage. The board require a bulk power supply of 45 volts +/- since the regulator will regulate the voltage output. Attached are 2 pictures of the board for your consideration. The price is $68.00 dollars shipping included. The board was made by Expresspcb. Accept pay pal.

Regards,
tauro0221
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Old 7th September 2011, 06:14 PM   #13
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Hi,

Attached are two pictures of my finished amplifier using the board.

Regards,
Tauro0221
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Old 7th September 2011, 06:24 PM   #14
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Hi,
Just in case the price is for USA.

Regards,
Tauro0221
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Old 7th September 2011, 06:44 PM   #15
epilot is offline epilot  United States
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Quote:
Originally Posted by CharlieLaub View Post
You don't seem to know much about the details, so why not just cut to the quick and buy this - it's ready-to-go:

LM3886 Amp Board+rectify filter+HEATSINK LM3886TF KIT | eBay


-Charlie
Can you tell me plz what is wrong based up on my understanding of that amplifier? I just want to assemble it and so need a PCB. I do not know whats wrong anyway!?
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Old 7th September 2011, 07:45 PM   #16
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There are many different bds with different options. I dont think anyone made one from the schematic of Fig1 in the data sheet.
so whitch options do you want?
Look up "LM3886 kits" and pick one.
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Old 9th September 2011, 03:54 PM   #17
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Quote:
Originally Posted by 4pyros View Post
There are many different bds with different options. I dont think anyone made one from the schematic of Fig1 in the data sheet.
so whitch options do you want?
Look up "LM3886 kits" and pick one.
Actually, the PCBs that use the LM3886 "XY Power Amp" PCBs use a circuit that is almost exactly like Figure 1 of the LM3886 datasheet. The Ebay board adds a series input capacitor, and a spot for a resistor on the chip amp output pin that could easily be used to install the 10 ohm resistor with wire wrapped around it, e.g. the parallel resistor/inductor mentioned later in the datasheet.

The Ebay PCB is not super awesome in terms of lack of star grounding, etc. etc. It's not designed by someone aiming for high end, and taking many precautions to get the highest performance. With that said, I have used many amps using prebuilt boards sourced from Ebay with success - they work just fine and I have not experienced any issues, noise, hum, etc. I have only found one instance of likely fake LM3886 chips. Not sure about the rest of the components. But you can also buy the bare board and roll your own with components that you source yourself at pretty low cost.

-Charlie
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Old 10th September 2011, 04:01 AM   #18
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make one yourself the DIY way... i assure you it will be a rich and rewarding
after all you are at DIYaudio.com
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Old 10th September 2011, 04:19 AM   #19
AKN is offline AKN  Sweden
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Hi,

LM3886 layout: Lm3886 pcb
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Old 10th September 2011, 06:27 AM   #20
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Quote:
Originally Posted by CharlieLaub View Post
You don't seem to know much about the details, so why not just cut to the quick and buy this - it's ready-to-go:

LM3886 Amp Board+rectify filter+HEATSINK LM3886TF KIT | eBay


-Charlie
...or this:
www.amp-yourself.de

Uli
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