夏季 DAC 原理和製作班 (AD1955) 5-SEP

Agree that seem why SONY use large R-CORE.
Sony use R-50 R-CORE for CDP-X5000

Also we use dedicated Analog power supply (R-30 R-CORE) for the DAC.

Is this your machine?

KK sir,

I am using default plan in DAC1955, may I know the default transformer spec now? how many secondary windings?

And also what is the size of the default transformer? Is it toroid?

It is one of my CD player in my home.

My gear :

SCD-1
SCD-XA777ES
CDP-XA50ES
XL-Z999 (Victor)
XL-V1 (Victor)
CDP-X5000
CDP-X3000
DCD-2560 (Denon)

Then what amp, what speaker? do you play LP?

It is a 95VA toroidal transformer.

The detail will be show to you at the assemble class.

我果塊DAC1955底板有少少彎, 我至今未焊through hole料, 辛苦咁耐撲完零件, 今晚焊SMD料時, 塊PCB平放玻璃上睇, 而家發現成塊板向一邊角慢慢彎起有2mm高, 我相信冇問題, 但係大家有冇注意到? 之前我塊PCB放書架上.

Speakers:

Victor SX-500 Spirit
Victor SX-100
Clone ProAC1SC +
KEF Reference 201mod
KEF Reference 100 Center
KEF 70S Rear speaker
KEF 1005 T Sub woofer + 5 Sat speakers for Presence speaker

Amplifier:
Tripath T2020
TI TAS 300W Class D
UCD 100
UCD 180
UCD 400+
UCD 700+
Denon 3600 AVR (1992)
Victor AX-V808GM  (1991)
Victor AX-S9 Int amp (1992)
Marantz AV9000 Preamp mod + Marantz MM9000 mod (2002)
Denon AVC-A1XV (2006)
Yamaha DSP-Z11 (2008)

一遍amp海 !  有冇位坐

AD1955 DAC PSU test result:

Power supply test only : (PASS, 2-Oct Updated)
Ronald
Kelvin Tai
R Lam
Geneltd
Joepet
Tony