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Old 11th April 2007, 01:37 PM   #1701
DeanP is offline DeanP  Canada
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Vorpal,
I built a six channel last year using three chips and three ps with two transformers.(23 +23,400va from Antek). I am going to rebuild again this year adding two parallel channels plus two active x-overs.
These chipamps are excellent with great clarity and power! I upgraded from a Rotel amp and noticed a big difference!
I have aproblem with a ground loop but it is because I used two ps for one trannie, When I rebuild,I will use only one ps per trannie and it should take care of the ground loop issue. Check out the chipamp threads, there are plenty of threads on this issue with a recent one definitely showing that one ps per trannie will stop ground loops.
So all in all, I highly recommend Peter's kits! Easy to follow instructions. I bought my trannies from Antek from e-bay though I noticed Peter sells Plitrons.
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Old 11th April 2007, 07:31 PM   #1702
vorpal is offline vorpal  Canada
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Great! Thanks for the quick reply man!

What do you use to turn the amp on? Is it auto-sensing?

Would you recommend buying 5 kits and bridging them? Would that be an option?

Just trying to figure out what the best would be. Would I be anywhere close to 150w/channel?

Thank you.
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Old 11th April 2007, 08:08 PM   #1703
DeanP is offline DeanP  Canada
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To turn the amp on,I have a 120vac relay which is plugged into my reciever, so when the reciever turns on it trips the relay, turning the amp on.
Depending on what "ohm" speakers you have will depend on what configuation you can do. Use on chip for two channels for 8 ohm speakers and use one chip in parallel for 4 ohm speakers.
So you would need anywhere from 1 1/2 kits to 3 full kits.
As for watts/channel, my amp delivers an unknown amount of watts(maybe 60-70) but compared to my old Rotel @ 150w/channel, this chipamp is no slouch!It goes louder with less distortion!
If you go to HTGuide.com and search out gainclone, you will find my 6 ch amp there. I go by the same name there.
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Old 12th April 2007, 06:00 AM   #1704
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I finally got my two ALL-In-One DACs put in cases....one black, one Alodine Clear. I retrofitted Tent Labs XO-DACs at 2.8224MHz, added power switches and power indicator LEDs. I've left room for Peter's USB adapter board and a selector switch.

I powered the XO-DAC from one leg of the on-board PSU and the LED from the other....seems not to cause a problem....what do you think Peter? Should I add another PSU? Also, when the USB board is added, can it run off the same PSU?
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Old 12th April 2007, 06:24 AM   #1705
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How were you able to connect an "external" clock to the board ?
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Old 12th April 2007, 08:08 AM   #1706
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Quote:
Originally posted by rjkdivin
....what do you think Peter?
Looks good. I would run the XO-DAC from the same supply as CS8412, same for the LED, but connected directly to the first cap (C3). That will provide some filtering and separation between DAC and the additonal circuit. I understand XO-DAC comes with on board regulators, so it should work fine this way.
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Old 12th April 2007, 11:47 AM   #1707
hayena is offline hayena  Czech Republic
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Hi,
recently, i constructed another chipamp using Peter's boards and with similar connection as the Patek (with cheaper parts) ...

Unfortunately, there is no sond comming out of speakres except significant buzz in th eright speaker - the left channel is totally silent. I also noticed that the chip on buzzing channel is getting very very hot...

any idea what the trouble might be?

Thanks.
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Old 12th April 2007, 11:50 AM   #1708
hayena is offline hayena  Czech Republic
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...and the view from above
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Old 12th April 2007, 02:04 PM   #1709
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Quote:
Originally posted by lordvader
How were you able to connect an "external" clock to the board ?
The trace from pin 12 of the CS8412 is cut on the back of the PCB. The XO-DAC input wire is taken from the CS-8412, and its output is taken to pin 1 of the TDA1543. This replaces the clock output of the CS0412 with the clock from the XO-DAC. The grounds for the input and output of the XO-DAC are taken together to the ground trace in the signal circuit of the AllInOne....I used the ground pad for the analog out RCA jacks. Guido Tent's documentation for the XO-DAC is quite good.
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Old 16th April 2007, 09:19 PM   #1710
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Default LM4780 Mute resistor

This being my first experience with a SMD ...

I dropped one on my black floor and it is limpossible to find (so far).

Is it important for this SMD component to be used or could one use a CADDOCK (I am sure this is overkill in the extreme, but, at least, the pins are easier to fit the pad)?

Thanks,
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