I am looking for some assistance with adjusting the variable resistors on a LM3886 parallel configuration. I recent purchased a prebuilt amp PCB from Nemo-e-store on eBay and I was very impressed with the sound from this configuration. I subsequently purchased the PCB's to DIY the design but, although the PCB came with a schematic it did not explain how to balance the 3 chips by adjusting the 3 variable resistors. I have come up empty handed searching the web and asking the guy I bought the PCB from.
The PCB I bought is here:
http://cgi.ebay.com/lm3886-3-Parall...34.c0.m14.l1262&_trkparms=|301:1|293:2|294:30
Can anybody help me with this problem?
Thanks for all y'alls help.
Sincerely,
Jeff M.
Lawton, USA
The PCB I bought is here:
http://cgi.ebay.com/lm3886-3-Parall...34.c0.m14.l1262&_trkparms=|301:1|293:2|294:30
Can anybody help me with this problem?
Thanks for all y'alls help.
Sincerely,
Jeff M.
Lawton, USA
I purfed up a 3*3886 non inverting and balanced it by lifting the three output resistors and adjusting each chip individually to the lowest dc offset. Then I adjust the two lowest to match the highest (8 mv).
Frank
http://www7.taosnet.com/f10/
Frank
http://www7.taosnet.com/f10/
I got it, thanks! Anybody know of a source to buy similar PCB's. I have tried to email www.Shine7.com several times with no response. I would love to get a few of the PCB's found at their website!
Thanks again for all of your assistance!
Sincerely,
Jeff
Thanks again for all of your assistance!
Sincerely,
Jeff
deepthrob said:I purfed up a 3*3886 non inverting and balanced it by lifting the three output resistors and adjusting each chip individually to the lowest dc offset. Then I adjust the two lowest to match the highest (8 mv).
Frank
http://www7.taosnet.com/f10/
Sorry, but I can't understand. Could you explain how exactly you adjusted each chip individually to the lowest dc offset.
Thanks.
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