OLD THREAD DAC End by Andrea Ciuffoli

[gaobingic]

I need the protel's file,thank you !

 

[habsrock93]

Is it too late to get a set of boards?

Thanks

Dave

 

[Joshua_G]

Are those PCBs still available?

 

[quanghao]

Are those PCBs still available?

Yes!

 

[quanghao]

Hi agithegreat!

Your DAC is ok???

 

[quanghao]

up update Salas shunt for CS8417 AND 74HC04

Hi all! Many recommended about the supply for CS and 74hc

yesterday I had test again about the Salas shunt for Cs8414 and 74HC04.
I show 5 x Tl431 spent many mA, so about 20 mA- one Tl 431, So i fix for Salas more mA, it is better for Dac,
last I use R13 = 27R, now you update R13 = 7-10R, and heasick for Irfp 9240 (Q13).
I'm sorry all very much.
Quanghao

Please

 

[adamus]

agreed, i have done this and the salas board looks likes its reglating better with higher currents

 

[quanghao]

agreed, i have done this and the salas board looks likes its reglating better with higher currents

Thank admus very much! your efforts to help people and I finished the installation of the Dac-end2.

Wish you happiness always!!!

 

[quanghao]

Welcome you!
Many member wrote thank for me!
Do not thank me, please!
Please say thanks to Andrea and Salas. Their design was great. ( I love them)

I only combine their design into a product for the DIY.

Thank all!
Thank Andrea and Salas! many many...
quanghao

 

[Agi]

Agreed, thats the best way with it. I use 2 x 27r now and it's great.
I'm waiting on my cs8414 and i'm ready to try it. The voltages are great elsewhere for me now, looks very clean on my scope. The heater supply works great with 2.2r (i used 2 x 2.2R 10W) i really extended them out of the board (the same height as the heatsink). They get hot, but they're rated to 10w, so shouldn't be a problem.

I get no relay chattering, i'm using lt1085 with the 2k/1k bridged, giving ~600k on R11.

Thanks guys for all your help. I'll let you know my results when i can test it.

🙂

 

[José Humberto]

Hello Quanghao
I´d like purchase 2 PCB DAC END without PS.
Please tell me if all is Ok.
I want two PCB DAC END=2X15=30$ + 5$ Shiping +3,5%1,23=36,23$
And your paypal e-mail is quanghao168@yahoo.com.vn
Please confirm all is ok for send the money
Best regards
Jose

 

[mikelm]

Hello Quanghao,

I also await your instructions for payment etc

mike

 

[ims]

Me too ...
for 2 boards of regulator.

😕

 

[ksnider1]

Hi Quanghao,

I also await for instructions payment for full set.

Thanks

 

[LuisMCP]

finished the dac. I am pleased with the front panel (schaeffer ge)

An externally hosted image should be here but it was not working when we last tested it.

please,

where did you the chassis?

 

[LuisMCP]

Hola,

I'm wondering if there are Gerber files available for these PCB's

Gracias.

 

[adamus]

chassis is just a rackmount case (2U) from Standard Rack Mounting Instrument Cases : Rack Mounting Cases : Maplin

The front panel is from Shaeffer Home - www.schaeffer-ag.de - Frontplatte, Front Panel, Face Avant, Frontplatten Designer
total cost of chassis was around £70

 

[vzs]

I plan to not use the TL431 at all on the DAC End board and replace the 10R with a 22uH or 47uH inductance on the +5V digital part.

My question is: do I need to use the 0.1uF + 220uF filtering on the DAC End or not?
Isn't the filtering on the output of the Salas shunt and the local 47uF + 0.1uF on the DAC End more than enough for this job ?

Thanks!

 

[erwincantona]

What bout DAC END 2 that was built by Andrea Ciuffoli ? I remember that he also have boards of this version (DAC END 2)

 

[quanghao]

I plan to not use the TL431 at all on the DAC End board and replace the 10R with a 22uH or 47uH inductance on the +5V digital part.

My question is: do I need to use the 0.1uF + 220uF filtering on the DAC End or not?
Isn't the filtering on the output of the Salas shunt and the local 47uF + 0.1uF on the DAC End more than enough for this job ?

Thanks!

IF you do not use TL43, keep 10R for CS8414 and 74HC04, it is better, no need 220uF and 0.1uf.
That is ok!