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OLD THREAD DAC End by Andrea Ciuffoli

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#746
i used a half watt bourns. it doesnt quite fit but did with a little persuasion.

got mine cased up today, horrible job cutting out the iec socket in steel. I used a rackmount case with alu front. looks good.

Just waiting on the transformers + tubes + nude foil resistors.
 
#748
I'll try and get some pics tomorrow.

The case only cost £29 delivered and i have to say its pretty nice, the only issue was the F'ing IEC socket as my usual dremel method wasnt effective in 3mm steel so i ended up drilling many holes and filing, which wasnt much fun.
 
#753
mikel_ann said:
Today I got the info for that custom transformer.

It is M85 core with primery 230V

and secondary:

1) 0 - 250, 100mA
2) 0 - 8, 3A
3) 0 - 12, 500mA
4) 0 - 12, 500mA
5) 0 - 12, 500mA

Price is 76,- EUR(simple) and 84,- EUR (covered, which i would prefer).
It is : Ausführung B, vergossen mit Haube

You can have a look at Netztrafos

I ordered there before and Gerd Reinhöfer ist doing a really good job.

If anyone interested, please let me know. I would like to order mine next week, cause the delivery time is 4 - 6 weeks.

regards Michael
Click to expand...


I'm interested also in 1 piece. Covered.
 
#756
Helping to find parts

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Power Supply for I/V Stage
========================
R1 22K 2W Try quickly any 1W carbon and find right value for right B+ 270V then buy a good one like R3
R2 100K 2W Try quickly any 1W carbon and find right value for right B+ 270V then buy a good one like R3
R3 270K 2W 500V Vishay FARNELL 896299
R4 470K 1W Dale RN60 WELBORNE
R5 10K 0.5W Dale ebay 400026898796
R6,R7 22R 2W Dale FARNELL 1277989
R8,R9 2.2R 4W Welwyn FARNELL 1219256
R10 47K 0.5W Generic Metal film
R11 1K 0.5W Dale WELBORNE
TR1 200R TRIMMER Vishay FARNELL 9608702
C1,C2,C3,C4 0.1UF 630VDC Vishay BC FARNELL 1166464
C5 150uF 450V Vishay BC FARNELL 1165371
C6 47uF 450V Panasonic FARNELL1673507
C8,C9 47+47uF 500V Jensen ebay Item 180413478642
C10,C11 4700uF 16V Vishay BC FARNELL 1165605
C12,C13,C14 270uF 16V Oscon SP ebay Item 310201286598
D1,2,3,4,6,7,8 1N5062-TR Vishay FARNELL 1612313
D5 10V ZENER
D9 Bridge rectifier
Q1 IRF840 Vishay FARNELL 8648573
Q2 2N2904 NTE FARNELL 1530749
IC1 LM338 National FARNELL 1469094
Transformer R80-36 DYICLUB.BIZ

=====================
Salas Shunt for DAC
=====================
R1,7,13 28R 2W (56R Parallel) Vishay FARNELL 1155017
R2,6,8,12,14,18 220R Dale RN55 ebay 400023718622
R4,10,16 100R 0.5W Dale RN55 ebay 400060639786
R5,11,17 10R 0.5W Dale RN55 ebay 390023280590
R3,9,15 47R 0.5W Dale RN55 ebay 390023316111
C1,7,13 4700uF 25V Elna ebay item 110477272327
C3,5,9,11,15,17 220uF 16V Elna Silmic
C2,4,6,8,10,12,14,16,18 0.1uF Vishay BC FARNELL 1215508
L1-L15 Generic Green LED
Q1,7,13 IRFP240 IR FARNELL 1463256
Q4,10,16 IRFP9240 IR FARNELL 1653670
Q3,15 BC550 Fairchild FARNELL 1467880
Q9 BC560 Fairchild FARNELL 1467886
Q5,6,11,12,17,18 2SK170 Toshiba ebay item 130351188411
D1-12 1N5062-TR Vishay FARNELL 1612313
Transformer1,2 9+9V

=======================
DAC END
=======================
R1-7 10R 1W Dale RN60 Welborne
R8-21 1K 0.5W Dale RN55 ebay 390024745931
R22 560R 0.5W Dale RN55 ebay 400025212430
R23,24 200R MK132V Caddok
R25 470R 0.5W Dale RN55 ebay 390023518699
R26(28) 75R 0.5W DaleRN55 ebay 390023320694
C1-7 270uF 16V Oscon SP ebay 310201286598
C8-12 C20,30,31 0.1uF Vishay BC FARNELL 1215508
C14,16,18,22,24 0.1uF Vishay RS 1666487
C13,15,17,19,21,23 47uF Oscon SA ebay 150414134548
C25 0.068uF Epcos FARNELL 9750860
C26,27 0.01uF Vishay RS 1666421
C28,29 0.01uF GAD-Viva ebay 260390883803
U1-7 TL431 Fairchild FARNELL 1467370
L1,L2 120uH Bourns FARNELL 1601334
SPDIF Transf. DA101C Murata FARNELL 1362398
CS8414 ebay 330360180451
AD1865NK ebay 180465366327
74HC04 FARNELL 1013912

=======================
I / V STAGE DAC END
=======================
R1,2,3,413,14,15,16 47K 2W Vishay FARNELL 9475338
R5,6,17,18 470R 1W Dale RN60 Welborne
R7,8,19,20 100K 1W Dale RN60 Welborne
R9-12, 21-24 220R 1W Dale RN60 Welborne
R30-33 2k 1W Dale RN60 Welborne
R25 220K 0.5W Generic
R26 1k 0.5W Dale RN55 ebay 390024745931
R27 5.6K 0.5W Dale RN55 ebay 400091516904
R28 4.7K 0.5W Dale RN55 ebay 390130730501
C2,6 1uF Obbligato Premium DIY HIFI
C3,6,8,11 220uF 16V Elna Silmic or Oscon 270uF 16V SP as above
C4,5,9,10 0.1uF Vishay RS 1666487
C12 100uF 50V Lelon, whatever
D1,2 1N5062-TR Vishay FARNELL 1612313
IC1 LM311 anything
Q1 BC337 anything
Relay Axcom FARNELL 9913670
V1,V2 5687 Philips Jan ebay 280219691072
 
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#757
quanghao said:
Hi hi! it is very fast, because the comments are the longest in the post that is offensive to the sender and recipient, so take about 3 weeks!

who have completed the DAC-End? You can comment on the sound of the DAC?
Click to expand...

Almost ready. Only a few parts to go.
 

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#758
apelizzo said:
Almost ready. Only a few parts to go.
Click to expand...

It is very nice!
but the tranformer near The Iv stage.
you can rotate 90 degrees transformers, power transformers and barriers between the motherboard and features a shield!

And you do not use L1, L2 so you do not use R30, R31, R32 , R34 .

R8, R9 (2.2 Ohm) in the HV supply is very hot, you can change by R 1 Ohm parallel

The Cap in put is good, i like it!
 
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