OLD THREAD DAC End by Andrea Ciuffoli

[Pocoyo]

AD1865n-k

Need your help about AD1865N-K

The white printing is from Digikey
The gold printing was another printing or fake ?

Please Help me

 

[housing]

I guess I may organize another group buy of AD1865N-K from Digikey some time later.

 

[Pocoyo]

Hi

Can you help me housing

The gold printing was the real IC or Fake ?

thank you before

 

[housing]

Can you help me housing

The gold printing was the real IC or Fake ?

thank you before

Sorry, I don't know. All I know is that Digikey is the only source for genuine AD1865N-K I'm confided in. Don't buy anything that you're not sure whether it's real or fake. It hurts.

 

[Pocoyo]

Sorry, I don't know. All I know is that Digikey is the only source for genuine AD1865N-K I'm confided in. Don't buy anything that you're not sure whether it's real or fake. It hurts.

Housing if you make it GB im in with 2 pcs AD 1865N-K
they will place at my wadia 12

thank you

 

[Yunick]

so! you check CS8414 and all pin of it.

I measured all pins regarding connectivity and all check out fine. Also the supply voltages are fine (4.98-5.02V).

I will get my scope tomorrow to see if I can measure the digital signals.

Thanks

 

[fredlock]

I guess I may organize another group buy of AD1865N-K from Digikey some time later.

Go Housing go! I'm sure the guys in the second batch of DAC boards will need this DAC chip and that also includes me and Ponyo. Keep us posted.

Thanks,

Fred

 

[Pocoyo]

Register Now

Im in for 2 pcs AD1865 N-K
will be 3 if i build andrea DAC

AD 1865N-K Group Buy by HOUSING
1. Pocoyo 2 pcs
2. FredLock 1 pcs
3. Housing 1 pcs
4.
5.
6.
7.
8.
9.
10.

Total GB : 4 pcs minimum order must 15
Will buy from DIGIKEY not from CHINA

 

[jims]

Hi I am in for 2

Thanks

JimS

 

[jasujonas]

Im in for 2 pcs AD1865 N-K
will be 3 if i build andrea DAC

AD 1865N-K Group Buy by HOUSING
1. Pocoyo 2 pcs
2. FredLock 1 pcs
3. Housing 1 pcs
4. jasujonas 1 pcs
5.
6.
7.
8.
9.
10.

Total GB : 4 pcs minimum order must 15
Will buy from DIGIKEY not from CHINA

 

[boudy]

Y'all are polluting this thread...

The chip GB belongs in its own thread.

 

[Pocoyo]

GB Update

AD 1865N-K Group Buy by HOUSING
1. Pocoyo 2 pcs
2. FredLock 1 pcs
3. Housing 1 pcs
4. jasujonas 1 pcs
5. jims 2 pcs
6.
7.
8.
9.
10.

Total GB : 7 pcs in view order (minimum order must 15)
Will buy from DIGIKEY not from CHINA

 

[Pocoyo]

Im very sorry
For a new Group Buy of AD 1865 N-K moved here

http://www.diyaudio.com/forums/group-buys/163183-ad-1865-n-k.html#post2118986

thank you

* Dont forget to support your AD 1865 N-K with another *

 

[torsken]

My mistake...perhaps this is the right way to load the heater to adjust the voltage to 6.3V....3 resistors in series....please correct me if i'm wrong...

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

Thank you very much for clarifying this. So what is the right way of testing the HV? If anyone can make a similar drawing I will be very thankful.

 

[mikelm]

1. Pocoyo 2 pcs
2. FredLock 1 pcs
3. Housing 1 pcs
4. jasujonas 1 pcs
5. jims 2 pcs
6. mikelm 1 pcs
7.
8.
9.
10.

 

[housing]

O.K. guys. Move your intention to buy AD1865N-K from Digikey here :

http://www.diyaudio.com/forums/group-buys/163183-ad-1865-n-k.html

Further entry in this thread will be neglected. Sorry!

Thanks to Jeff for setting up the thread for the new international group buy.

 

[apelizzo]

After comparing three DACs with some people, they all choose my old DAC with AD1865 with different tube setup.

I think in this project the I/V tube stage can be improved.

The bottom line is: this DAC costed three times the old one, it's far more complicated and it does not reach the performance of my old one.

Good lesson.

 

[CustomHT]

After comparing three DACs with some people, they all choose my old DAC with AD1865 with different tube setup.

I think in this project the I/V tube stage can be improved.

The bottom line is: this DAC costed three times the old one, it's far more complicated and it does not reach the performance of my old one.

Good lesson.

So where to now??

Are you gonna try and upgrade this dac or I/V tube stage to improve its performance?

 

[adamus]

do the led bias mod, it makes a very good impact.

cathode bypass caps to my ears sound a little confused and muddy.

Replace the anode resistors with a CSS or gyrator (the later i have not tried). 7.5ma is a little too low on the 5687's, 12ma + is a good idea to be linear.

 

[tassosk]

Hi Adamus,
Since I too have DACMagic for reference, how does it compete DACEND2 after the modification in terms of resolution of details?