DAC 2496 (AK4393) DAC KIT With CS8416+AK4393+5532 - Page 127 - diyAudio
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Old 25th February 2012, 11:20 PM   #1261
50AE is offline 50AE  Bulgaria
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@ggetzoff, where did you see 1k value?

About the resistors, I only changed anode and cathode resistors. 150R cathode for the Broskie and 150R cathode again for the anode follower. B+ is 220V, anode resistor 11k.
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Old 25th February 2012, 11:24 PM   #1262
hotiron is offline hotiron  Scotland
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pins 17 and 19 measure .02V (8416) surely this cant be right !? 47K should be pulling these pins high!! Duff chip??????
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Old 25th February 2012, 11:59 PM   #1263
hotiron is offline hotiron  Scotland
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Could someone measure a working DAC please, the 2 47k next to L1.
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Old 26th February 2012, 07:54 AM   #1264
hotiron is offline hotiron  Scotland
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No Worries I've got it working now. It was a Reset problem.Sounding great.
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Old 26th February 2012, 12:47 PM   #1265
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Quote:
Originally Posted by 50AE View Post
@ggetzoff, where did you see 1k value?

About the resistors, I only changed anode and cathode resistors. 150R cathode for the Broskie and 150R cathode again for the anode follower. B+ is 220V, anode resistor 11k.
The Unbalancer

Here's Broskie's schematic for VOUT usage and the link. Great article BTW.
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File Type: png Unbalancer%20DAC%20V-out%20Schematic.png (51.3 KB, 756 views)
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Last edited by ggetzoff; 26th February 2012 at 12:48 PM. Reason: content
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Old 26th February 2012, 02:15 PM   #1266
jef9200 is offline jef9200  Belgium
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Hi all,
here is my version. Modified with the BOM, and transfos output. I use Jensen JT11-P1.
4X 470r carbon resistor, 2200pf mica in // (filter 70khz), and 13k srie with 620pf between hot and cold on rca (anti-ringing, Jensen data sheet).
Sound is fine..
Before, i use caps output, but sound was no as good. No good bass.
Click the image to open in full size.
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Old 29th February 2012, 07:01 PM   #1267
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Hi there all

Ive been skim reading through this great thread over the past couple of days, theres so much information to take in though.

I have purchased a pre-built DAC of fleabay in the black and silver aluminium casing, it took just short of 4 weeks to arrive and is a great bit of kit.

I have changed the op amp to a 46xx version and it sounds really good through my Sony APM 22ES speakers and home built power amp, unfortunately it seems to be lackin a bit of bass as said previously in the thread.

As the case is a bit short of space and i can only add components to the top side of the board due to the space constraints, can i ask what would be the best (and simplest) as im a bit of a newbie mods to get a bit more oomph out of the dac.

Im comparing it to my previous digital to analogue converter built into my Sony 2400ES home cinema amp and my source is a squeezebox playin flac files.

best regards and many thanks in advance.

James H
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Old 29th February 2012, 10:24 PM   #1268
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Quote:
Originally Posted by PsychoDogBeast View Post
Hi there all

Ive been skim reading through this great thread over the past couple of days, theres so much information to take in though.

I have purchased a pre-built DAC of fleabay in the black and silver aluminium casing, it took just short of 4 weeks to arrive and is a great bit of kit.

I have changed the op amp to a 46xx version and it sounds really good through my Sony APM 22ES speakers and home built power amp, unfortunately it seems to be lackin a bit of bass as said previously in the thread.

As the case is a bit short of space and i can only add components to the top side of the board due to the space constraints, can i ask what would be the best (and simplest) as im a bit of a newbie mods to get a bit more oomph out of the dac.

Im comparing it to my previous digital to analogue converter built into my Sony 2400ES home cinema amp and my source is a squeezebox playin flac files.

best regards and many thanks in advance.

James H
Hi James

These dac chips seem to take quite a while to settle down.
I would not look to change anything untill you have between 100-300hrs on the unit (I always wait for 300hrs)
Then if you still have an issue, follow ClaveFreman's BOm staring with power supply
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Old 29th February 2012, 11:10 PM   #1269
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Originally Posted by sterlingmck View Post
Then if you still have an issue, follow ClaveFreman's BOm staring with power supply
And LPF filter caps...

They're only 2...
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Old 29th February 2012, 11:14 PM   #1270
Ryssen is offline Ryssen  Sweden
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Quote:
Originally Posted by jef9200 View Post
Before, i use caps output, but sound was no as good. No good bass.
Click the image to open in full size.
I use output cap,but Im locking for a output tranny.
Is the bass good with the JT11-P1?
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