DAC 2496 (AK4393) DAC KIT With CS8416+AK4393+5532 - Page 215 - diyAudio
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Old 2nd October 2012, 03:32 PM   #2141
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Yes. The output voltage always is higher when the load is light.
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Old 2nd October 2012, 03:59 PM   #2142
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Jean-Paul - thanks for the quick response. I'll feel better about leaving it on for an extended period of time now. I will put a heatsink on the LM7812 though. Its really does get hot.
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Old 2nd October 2012, 04:02 PM   #2143
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Measure the voltage over the filter caps and compare with their rating. I forgot exact values but you understand that, for instance, 20 V DC on a 16 V cap won't be beneficial for longevity.

You are right about the heatsink.
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Old 2nd October 2012, 04:53 PM   #2144
rpfunk is offline rpfunk  United States
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I'll do that. Originally I was going to buy the board and components separately, but changed my mind and got the kit instead for an easy project. I think now that maybe I should have stuck with my original idea.
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Old 2nd October 2012, 06:29 PM   #2145
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My two cents

It's been my experience the starting with a complete kit offers some reassurance to builders with entry level or moderate experience like myself. Unless one has some advanced knowledge, there can be a lot of "Hunt and Peck" in parts selection. IMHO, most of the upgrades are not that expensive and each builder should decide if the safety factor is worth the extra dollars.

At the rate I going I won't be able to hang out my "Guru" shingle till around 2047. Till then I'll probably lean toward starting with kits
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Old 2nd October 2012, 09:26 PM   #2146
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The thing that swayed me on the complete kit was the fact that I have 2 other DIY audio projects that I have not completed (and I started them months ago). One a tube amp 90% done and the other a AMB input/output selector - attenuator - Display processor at about 80% done. The AMD project requires several very small connctors to be built which I have yet to complete since I don't have the correct crimping tool. The tube amp just makes me nervous. With this kit I received it in the mail and had it working the next day. I remember spending quite a bit of time on mouser doing the "Hunt and Peck" portion my other 2 projects.
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Old 4th October 2012, 07:05 PM   #2147
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May be a stupid question but I have just received my 4398 board and:

The schematic show the 'analogue' section fed from a 15-0-15 supply with the CT grounded.

But no earth is shown on the 9-12V 'digital' ac supply. Should one of these also be grounded and if so, which of the two terminals? Or is is it just left to float, or does it pick up its reference voltage from the earth on the 'analogue' supply?
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Old 5th October 2012, 07:18 PM   #2148
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Hi, I now use my pc with a USB SPDIF converter to supply my AK4396 dac.
I have just had a tinker and plugged the dac directly to my power amp.
I like the sound much better this way so would it be possible to put a volume pot in between the dac and power amp.

If this is no problem, what value would be best 50k, 100k.
My amp is the Linn LK280 which I believe has a strange input impedance. 3k ohms I believe

Last edited by j baldam; 5th October 2012 at 07:21 PM.
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Old 5th October 2012, 08:44 PM   #2149
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This is much more than is necessary, but may be helpful. Shielded Pot

Also - here is a simple diagram. SMD Pot - from eBay.

vrsteppednewwiring.jpg
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Last edited by bcmbob; 5th October 2012 at 08:55 PM.
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Old 6th October 2012, 10:59 AM   #2150
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Quote:
Originally Posted by bcmbob View Post
This is much more than is necessary, but may be helpful. Shielded Pot

Also - here is a simple diagram. SMD Pot - from eBay.

Attachment 304906
Hi Bob, would you rcommend this pot and it's value 10k over say a blue alps pot
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