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Old 29th April 2010, 01:08 PM   #1531
adamus is offline adamus  United Kingdom
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I'd change the 33r for 27r.

Try 8ohms for r13, but make sure the fets have heatsinks
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Old 29th April 2010, 01:09 PM   #1532
Yunick is offline Yunick  Sweden
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I have 11r and my mosfet is blistering hot! Even with heatsink..
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Old 29th April 2010, 01:18 PM   #1533
adamus is offline adamus  United Kingdom
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it depends on the current through the resistor, tolerances count for a lot here.

Mine isnt that hot with 11r, i could get away with no heatsink.
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Old 29th April 2010, 01:24 PM   #1534
Yunick is offline Yunick  Sweden
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ok.
I'll measure the current through the resistor tonight..

Thanks
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Old 29th April 2010, 02:20 PM   #1535
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Now I have 8.2 27 27

The Vgs differences increased, now I have 3.9 V, but not the output voltages. Could it be that my leds are forcing a too high reference voltages ?

Davide
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Old 29th April 2010, 02:26 PM   #1536
adamus is offline adamus  United Kingdom
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it could be.

I wouldnt worry about it, once i hit about 5.3v, on the scope the output after the tl431 looks the same as those on 5.6v.
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Old 29th April 2010, 02:47 PM   #1537
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Quote:
Originally Posted by Yunick View Post
Very nice!

I see you have Wima on the output of I/V. how do you like them?

I tried RIFA PHE426 1µf and liked it very much.

You have some good time ahead trying different mods

Best Regards
David
I like them, I'm surprise how well it plays. I want to try some Russian OTK PIO caps later on. I did A-B with my Y2 DAC and found that when using terminal blocks L input channel on I/V is R and R is L. Photo on my previous post is correct.
I also had jumper set to 1-2, I changed to 2-3.
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Old 29th April 2010, 03:55 PM   #1538
tassosk is offline tassosk  Greece
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I'm planning to use a custom made 80VA toroidal trafo with 3x12V. Will it be any problem for the Sallas reg or is better to use one 2x12V trafo for the +5V,-5V and one 1x12v for the +5V?
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Old 29th April 2010, 06:29 PM   #1539
Yunick is offline Yunick  Sweden
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I thought I should post some pictures of my build.

I did as Adamus recomended and removed the inductors and added the "led-mod". I listened to the DAC standard and to me these mods made it suit my ears better.

I tried both E182CC and 5687 and prefer the E182CC. Also use Sprauge Hyrel Q 1µf output caps.

To me this DAC easily beat my old parallell tda1543 dac.

Thanks Quang hao, Andrea and Salas. Also thanks to everyone who contributed in this thread!
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Old 29th April 2010, 11:22 PM   #1540
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Default NOS E182CC Mullard

I got my DacEnd up and running yesterday. I had day off today and I'm playing music all day. I'm enjoying very much. I'm running with GE JAN 5687WB, I want to try E182CC. Where preferably in US I can get E182CC for reasonable price ?
I found on ebay:
"6N6P Double Triode, It is direct replacement of ECC99,E182CC"
but it's not, correct ?
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