Soekris Dam Dac

[nige2000]

my guess is the filters need fixing
then when thats sorted feed dac with +/- 5v and 3.3v lifepo4
bypass 5v regs and 3.3v ldo
replace caps

thats about it any more were at great risk of dead dac

putting this build more or less on hold till there's better filters or there bypassed

There are new filters to try. Sounds like they can still be tweaked, but its a start.

Randy

yea designing filters aint my thing

ill let a few of them gather up before i try em
sort the wheat from the chaff

i wouldn't be prepared to surrender detail for smoothness, seems some of the guys are trying to smooth it out
not sure thats the right way
but i dont really understand these things:)

need to practice some serial updates, has dimdim the only tutorial?

[rickmcinnis]

HIFIARDUINO talks about it but I think dimdim is more easily understood by someone like me.

I see the folks writing about the filter files but have not figured out where they are OR how to install those.

Can you point me in the right direction?

[nige2000]

this is new to me too

[nige2000]

Anyone try the filter's yet?

[nige2000]

ive tested nos no digital filter
made a hell of a difference
actually worth boxing up as is

lots of hassle with serial connection
but i didnt know what i was doing so.....

[randytsuch]

ive tested nos no digital filter
made a hell of a difference
actually worth boxing up as is

lots of hassle with serial connection
but i didnt know what i was doing so.....

Guess you liked nos. I was going to try to get the serial working this weekend but was too lazy.
Sorry I haven't really done anything yet, it will happen one of these days.

[rickmcinnis]

Finally got mine playing.

No firmware update nor filter changes.

Instead I used dBPoweramp to upsample to 24/256 and I thought the thing sounded pretty good. Nothing to compare to but my turntable set-up which is no slouch.

Having to use Jplay since I cannot get MQn to work with my NTLite Win 10 (2.5bG c:folder). Will try the new beta tonight but wonder if it is going to need some of the junk I left out.

Very different from records which is something I like. Change can be good.

Have not listened long enough to hear the bad stuff - it will come out just as it does with anything. At this point I have analogue fatigue.

Will get the firmware in tonight along with the the filters.

Paul has also produced a 256 filter which should make for an interesting comparison.

Just using transformers, no batteries at this point (other than for isolation chips). Will get a feel for what this set-up sounds like and make the transition to battery this weekend.

So nige2000 - have you reconsidered using the alternate power input? One wonders if those PCB traces are a little too skimpy. Thinking about removing that rectifier but not sure of the configuration. With only four pads I figure it must be dual - full wave (not a bridge). Do you concur?

[nige2000]

It's just a regular diode bridge
it doesn't take in gnd from transformers so it just outputs + and -
gnd is the center voltage point

yea will end up taking off the diode bridge and bridging across the pads

fair idea how I'm gonna power it so I'm gonna put it in some sort of case to hardwire it with power, serial port etc

[rickmcinnis]

Didn't think anyone did rectifiers like that anymore but now that I bother to think about it if it was full wave there would be a need for a center tap input. (duh...)

Yes, that rectifier will be coming off this weekend.

Thanks,

[nige2000]

batteries arrived from reichelt




thought they were generic but they kinda look genuine a123