DAC 2496 (AK4393) DAC KIT With CS8416+AK4393+5532 - Page 155 - diyAudio
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Old 8th April 2012, 09:57 PM   #1541
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Unfortunately that Jim's Audio pcb is not for a Broskie unbalancer.

Apparently just a simple preamp, with a dual valve per channel. With Jim's audio we can never know because they hide the schematics.

It would be great to a get a Broskie kit from eBay.

Sorry to disagree with you 50AE, but a pcb is always better than a point to point circuit. Designing and making one is not such a big deal, particularly today.

I just counted 26 solder points on a single channel for the Broskit, with high voltages and all, I don't think is safe to do such a thing.
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Old 9th April 2012, 07:34 AM   #1542
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Quote:
Originally Posted by carlmart View Post
Unfortunately that Jim's Audio pcb is not for a Broskie unbalancer.

Apparently just a simple preamp, with a dual valve per channel. With Jim's audio we can never know because they hide the schematics.

It would be great to a get a Broskie kit from eBay.

Sorry to disagree with you 50AE, but a pcb is always better than a point to point circuit. Designing and making one is not such a big deal, particularly today.

I just counted 26 solder points on a single channel for the Broskit, with high voltages and all, I don't think is safe to do such a thing.
it's actually the other way around. point to point should sound BETTER. there is a reason why high end tube companies prefer to make their amp point to point . but if we count the other factor, which is safety, then yes, pcb would be the wiser choice
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Old 9th April 2012, 09:08 AM   #1543
50AE is offline 50AE  Bulgaria
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While both have their pros and cons, I prefer the point to point for tubes, because:
-there is freedom and less limits of imagination for your layout
-it is more simple to realize, a properly made PCB can be tricky to make
-more simple to modify (removing components for a listening test)
-it should sound better, because the freedom in PtP you have

About safety, it's good to think about it.


A few hours ago I built another Salas 5V shunt and configured both to work. One will be for analog part of the DAC and the other for the digital part of the USB->I2S.
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Old 9th April 2012, 11:01 AM   #1544
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I think the best of both worlds can be arranged. You do need a flat surface to assemble the parts and solder p2p, right?

If you design a pcb to be used on the "component side", you can still use large pads to put solder in and then solder the other part on same solder. What you won't have is tracks, but the wires will be soldered directly to each other.

I still think, and will continue to use, that pcbs are better than p2p, except of course for experimenting. But one thing should be considered as a directive: distance between parts should be minimal.
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Old 9th April 2012, 10:24 PM   #1545
billo44 is offline billo44  United Kingdom
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Default Dead DAC

I seem to have a dead DAC on my hands....
Power, 96k, error lights come on, 96K goes off when SPDIF is plugged in, error light flickers when the CD is spooling up and goes out when the CD plays.
just no sounds...
Transformer voltages are OK.
I swapped the op-amp for the original, it being the only thing which is socketed, but same results as expected.

My principle DAC one of Peter Daniels NOS DAC (I love it) works in the same slot with all the same cabling (all other thing equal).

Can any one spot anything stupid?
Do those symptoms mean anything to anyone? (Apart from 'it's fu--ed'!)

Bill
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Old 9th April 2012, 10:32 PM   #1546
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Quote:
Originally Posted by billo44 View Post
Can any one spot anything stupid?
Do those symptoms mean anything to anyone? (Apart from 'it's fu--ed'!)
Hi Bill,

is the 15-0-15 wired correctly?

It seems wrong...

Can you post bigger pics?
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Old 9th April 2012, 10:44 PM   #1547
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hi transformer may not be wired correctly.

left to right

black black green green + yellow yellow


colours seem different on mine although it looks the same transformer, will look further

Last edited by j baldam; 9th April 2012 at 10:48 PM.
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Old 9th April 2012, 10:49 PM   #1548
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nice to see you Dario should not you sleep by now?
btw are you done with the shunt-psu for this dac you have been designing?

best regards
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Old 9th April 2012, 10:52 PM   #1549
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on my transformer black is 9v green is 15v and yellow is 15v all wired as in post above.

transfer to your colours
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Old 9th April 2012, 11:09 PM   #1550
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Originally Posted by Nosian View Post
nice to see you Dario should not you sleep by now?
btw are you done with the shunt-psu for this dac you have been designing?
Quite, here is 1:07AM...

I've just received all the needed parts (hopefully), I hope to give it a try next week end.

I've been busy with the My_Ref Fremen Edition and modding a My_Evo.
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