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OLD THREAD DAC End by Andrea Ciuffoli

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there is no point, each dac will sound slightly different depending on

operating point of IV
tubes
singal caps
LEd mod or not
cathode bypass cap type + size
CCS or not
filterectomy or not

so many variations and each will sound slightly different.

Warm and syrupy (what many would call 'tubey or valve sound' )? Then use the stock BOM with the filter, use bypass caps in the cathodes. Loose warm bass but lovely mids and liquid highs.

Slightly warm but clearer? use the LED cathode mod (getting rid of the cathode resistors and bypass caps) and ditch the filter. Bass tighter and better defined, mids still great (but not quite as euphonic) and the highs a little clearer (but still warm).

Accurate with even tighter bass? Then drop the B+, use a CCS as the anode load, use a the LED mod, ditch the filter.

All subjective, but thats how i heard things.

I prefer it to the cambridge audio dac magic, its more natural to my ears, but then the parts alone cost as much as the complete dacmagic, so one would expect it to perform to a similar standard.
 
Ok, thanks.
I ask you this question in another form. Please, could you give a rating for this dac with the scale from 0 to 10. Only your subjective opinion.

OK. Let me reply you this way.

I own a Pioneer PD-T09 Japanese 100V version that I bought in the mid-90s for USD1500.- (HK is tax-free) that I still use it as a CD player for digital output. The DAC-end wins in every aspect re: the DAC portion.

The DAC-end built by me is a keeper. Otherwise I'll not house it in a chassis fitted with WBT RCA inputs and Furutech FI-10(R) Rhodium-Plated IEC connector.
 
some image update Dac-end 2, with new PCB, new IV, use 6h30, or 6h6, 6dj8.
thank
 

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My friend say:

*The doctor is busy walking to project what the topic is too quiet, waiting forever do not see any medical report on the progress and results at all. After a calibration period, re-arrangement END DAC, please post some picture showing this with the doctor. Last night I went to play audio DAC reseach model (do not remember, but it bears), TEAC CDP 50, according to their personal nature, the DAC for audio END feeling smooth, easy, quiet, high to transfer, low down deep definitive solution, and solid, no holes rumble function, travel bags tiegn BASS hear his real *
 

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Originally Posted by belkoff
1. pathetic (1 set)
2. cchean ( 2 sets )
3. Lucylu (1 set)
4. Ulyses31 (1 set)
5. damohpi (1 set)
6. mikvous (3 sets)
7. gipione ( 1 set)
8. flocchini (1 6h6P if done, 1 Salas HV)
9. belkoff (full set dac end 2 + 1 6h6P if done, 1 Salas HV) + schematic for each PCB
10 klaju1955 (1 set)

Hi Guys This is the current list ok?
please add yourselves on
 
Just sharing my progress. I do not have much time to spend on the project but I am nearly there.

Yesterday I managed to run Salas Shunt. R13 = 8.9R (2x 18R in pararell). With DAC board is attached (no ICs though) I am able adjust ditigal branch up to 5.3V. If I try to go for higher voltage it locks at 5.37 (Vgs drops to zero). For both analog branches I am able to ajust up to +/- 5.6V

Also I am thinking about using Russian PIO caps for I/V. Those are really BIG BOYS (even compared tho Hyrels) 😀 😀 😀

Tomorrow I will post more pictures.
 

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1. pathetic (1 set)
2. cchean ( 2 sets )
3. Lucylu (1 set)
4. Ulyses31 (1 set)
5. damohpi (1 set)
6. mikvous (3 sets)
7. gipione ( 1 set)
8. flocchini (1 6h6P if done, 1 Salas HV)
9. belkoff (full set dac end 2 + 1 6h6P if done, 1 Salas HV) + schematic for each PCB
10. klaju1955 (1 set)
11. ben-jam-in (1 set)
 
1. pathetic (1 set)
2. cchean ( 2 sets )
3. Lucylu (1 set)
4. Ulyses31 (1 set)
5. damohpi (1 set)
6. mikvous (3 sets)
7. gipione ( 1 set)
8. flocchini (1 6h6P if done, 1 Salas HV)
9. belkoff (full set dac end 2 + 1 6h6P if done, 1 Salas HV) + schematic for each PCB
10. klaju1955 (1 set)
11. ben-jam-in (1 set)
12. morpheous 1. PCB- DAC END =15 $ and 1 PCB- Salas Shunt For DAC=15$ + schematic for each PCB.
 
Originally Posted by ben-jam-in View Post
1. pathetic (1 set)
2. cchean ( 2 sets )
3. Lucylu (1 set)
4. Ulyses31 (1 set)
5. damohpi (1 set)
6. mikvous (3 sets)
7. gipione ( 1 set)
8. flocchini (1 6h6P if done, 1 Salas HV)
9. belkoff (full set dac end 2 + 1 6h6P if done, 1 Salas HV) + schematic for each PCB
10. klaju1955 (1 set)
11. ben-jam-in (1 set)
12. morpheous
.....
 
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