Getting There
Nearly at the point to start drilling the chassis, but will probably move the power supplies into their own box. The (incomplete) output stage power supply (E-I transformer, blue turret board, 2x chokes & DC heater supply (6 caps on stripboard) is taken from Thorsten Loesch's design, which is optimised for the AD1865: http://www.fortunecity.com/rivendell/xentar/1179/theory/vasfda/vasfda.html
No bypass capacitors used & Black Gate PK used for all IC decoupling. Analogue power supply uses Elna Silmic and digital uses Elna Cerafine & Oscon SP. Shinkoh I/V resistors & PRP resistors everywhere else. Minimal magnetic parts are used, so even more reason to put the transformers in their own box!
Teflon sockets, 6H23n-EB tubes, 1/2 watt PRP resistors & film/oil Obbligato output caps (large as they're driving a passive preamp) for the SRPP gain stage again taken from Thorsten Loesch's design.
An externally hosted image should be here but it was not working when we last tested it.
Nearly at the point to start drilling the chassis, but will probably move the power supplies into their own box. The (incomplete) output stage power supply (E-I transformer, blue turret board, 2x chokes & DC heater supply (6 caps on stripboard) is taken from Thorsten Loesch's design, which is optimised for the AD1865: http://www.fortunecity.com/rivendell/xentar/1179/theory/vasfda/vasfda.html
An externally hosted image should be here but it was not working when we last tested it.
No bypass capacitors used & Black Gate PK used for all IC decoupling. Analogue power supply uses Elna Silmic and digital uses Elna Cerafine & Oscon SP. Shinkoh I/V resistors & PRP resistors everywhere else. Minimal magnetic parts are used, so even more reason to put the transformers in their own box!
An externally hosted image should be here but it was not working when we last tested it.
Teflon sockets, 6H23n-EB tubes, 1/2 watt PRP resistors & film/oil Obbligato output caps (large as they're driving a passive preamp) for the SRPP gain stage again taken from Thorsten Loesch's design.
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Quanghao,
Can you explain this in more detail..?
I'm using 220K and I'm using it with a DAC! Are you saying I should be using 2K?
1. if you use for DAC, that is 1K,9 2K//2K) it is one par filter for DAC
On PCB DAC, there are 0.01uF +L + 1K( but 1k I put one PCB IV)
2. If use the sample one PRE, that is 100-220K
thanks
Please go to this link, the DAC-END up dat 20011
The best PCB and excellent layout, the best sound:.
http://www.diyaudio.com/forums/quan...7-dac-end-best-dac-ad1865-updat-2011-a-5.html
In another DAC http://www.diyaudio.com/forums/digital-line-level/137976-experience-diy-dac.html
I use salas shunt and I use 15 ohms without heatsinks,works fine.
I use salas shunt and I use 15 ohms without heatsinks,works fine.
im interest of dac ash.... did you have stock of pcb mr quanghao??
please give me total cost 1set pcb dac ash n payment method..
i send u email from ermac_1982@yahoo.com
thank you
please give me total cost 1set pcb dac ash n payment method..
i send u email from ermac_1982@yahoo.com
thank you
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