Quanghao,
Can you give me the link for the PCB and the parts to build this DAC
Or where I can buy your PCB
tks
Can you give me the link for the PCB and the parts to build this DAC
Or where I can buy your PCB
tks
Some friend bil test DAC -END 2, and they said:
*Hi all
So far I do not care to DAC-2 End of QH proud because I had heard DAC3 Bel canto is stable.
This afternoon, the brothers on the board support bel canto em DAC3 shoulder exam with DAC-2 End of Uncle pride in Uncle Masterbordy on the same system are:
Tandberg Studio Monitor Speakers
Power Quad 50E
CD Esound E-5 Signature
McIntosh C42 Pre
Audio Art Cable Wire Signatune sierie
The results were unexpected because they held him blind test for objective standards is quite fair.
Only regret that the DAC-END 2 hours is not sufficient version is missing the audio filter something I did not understand the technical and the DAC-5687 END 2 using the new tube is not running clearance is completed.
In Bel Canto DAC3 not well plugged into the ports and unused Aes Bal gateway should not develop its full potential.
But both are using port port BNC input signal and the RAC interconnect and speaker cables alike.
Today there are seven players participating in the evaluation of high sound levels can be said is a very high level of competence. Analyzing the strengths weaknesses of each test.
The result is surprising END DAC-2 has votes equal Bel canto DAC3 17/17 points.
Everyone recognized by Uncle masterbody CDP hearing or Bel canto one or more DAC-End 2 DAC3 and this is the biggest surprise.
but it must be said DAC-END 2 successful as compared to the Bel canto DAC3 price is $ 2,999 list price I bought second hand on oudiogon on the U.S. is $ 1,400.
Congratulations Quang Hao
*Hi all
So far I do not care to DAC-2 End of QH proud because I had heard DAC3 Bel canto is stable.
This afternoon, the brothers on the board support bel canto em DAC3 shoulder exam with DAC-2 End of Uncle pride in Uncle Masterbordy on the same system are:
Tandberg Studio Monitor Speakers
Power Quad 50E
CD Esound E-5 Signature
McIntosh C42 Pre
Audio Art Cable Wire Signatune sierie
The results were unexpected because they held him blind test for objective standards is quite fair.
Only regret that the DAC-END 2 hours is not sufficient version is missing the audio filter something I did not understand the technical and the DAC-5687 END 2 using the new tube is not running clearance is completed.
In Bel Canto DAC3 not well plugged into the ports and unused Aes Bal gateway should not develop its full potential.
But both are using port port BNC input signal and the RAC interconnect and speaker cables alike.
Today there are seven players participating in the evaluation of high sound levels can be said is a very high level of competence. Analyzing the strengths weaknesses of each test.
The result is surprising END DAC-2 has votes equal Bel canto DAC3 17/17 points.
Everyone recognized by Uncle masterbody CDP hearing or Bel canto one or more DAC-End 2 DAC3 and this is the biggest surprise.
but it must be said DAC-END 2 successful as compared to the Bel canto DAC3 price is $ 2,999 list price I bought second hand on oudiogon on the U.S. is $ 1,400.
Congratulations Quang Hao
You got email
Also pls let me know if possible to buy the transformer and chassis from u
I understand many of you use Caddok resitor as I/V stage.But there are many variants of the caddok resistors.
Exact vad resistor did you use?
Exact vad resistor did you use?
The Texas TX2575 resistors seem to be even better than the Caddock MK-132, they are available at partsconnexion.
BTW the most important thing with this dac is the output stage. Everything else is more or less cosmetics...I ended up with a C3g (fantastic tubes) in triode mode and a Lundahl LL1660 as output transformer. Wonderful sound, and much much much better than the former E182cc with capacitor output. Last step would be a Sowter I/V transformer, but they are not cheap.
And I much prefer a choke in the HV-powersupply instead the 470R resistor. I liked it so much, I even put 2 chokes in...and a decent 100µf film cap as last PS cap.
have fun,
Juergen
BTW the most important thing with this dac is the output stage. Everything else is more or less cosmetics...I ended up with a C3g (fantastic tubes) in triode mode and a Lundahl LL1660 as output transformer. Wonderful sound, and much much much better than the former E182cc with capacitor output. Last step would be a Sowter I/V transformer, but they are not cheap.
And I much prefer a choke in the HV-powersupply instead the 470R resistor. I liked it so much, I even put 2 chokes in...and a decent 100µf film cap as last PS cap.
have fun,
Juergen
So has anyone really heard difference with the Caddok or the Texan resisotors
is it worth uppgrading?
I do now use Lundahls trafo at the output but don´t like the sound thats why I am building the tubestage.Will use the 6H30.
is it worth uppgrading?
I do now use Lundahls trafo at the output but don´t like the sound thats why I am building the tubestage.Will use the 6H30.
I don't know. These are from an old tube radio, and have a resistance of about 300ohms. I guess around 15hy, 10 would be also fine. Each has a voltage drop of about 20V, and I also use a 6X4 tube rectifier, so another 20V drop. Transformer is 250-0-250, but at the last PS-cap there is only 200V DC left, which is perfectly fine for the C3g ande shunt running with 70mA.
For trying out a choke I would take just what you have in the box, or get some old radio stuff, its good quality from the 50ies...
For trying out a choke I would take just what you have in the box, or get some old radio stuff, its good quality from the 50ies...
Isn't C3G a high gain tube (even used as triode strapped)? What value of Rk and Ra which you use to reduce the gain?
Tyo
Yes, it is high gain, but the Lundahl is connected 4,5:1 as stepdown to lower the output impedance. So there is no Ra, Rk I took 150 Ohm to get about 14-15 mA. More could be better, but the Lundahl is normally only up to 10mA. Voltage at the anode is 160 Volt.
And preamp is DCB1, so no gain in the there...So there is even not enough gain, I am really thinking about Sowter I/V transformers, as these have some step up.
cheers,
Juergen
And preamp is DCB1, so no gain in the there...So there is even not enough gain, I am really thinking about Sowter I/V transformers, as these have some step up.
cheers,
Juergen
... C3g in triode mode and a Lundahl LL1660 as output transformer ?
It is possible see my Phono End
Hi-end phono preamplifier
a single C3g per channel with LL1660/10mA 4.5:4 or 4,5:2 will be ok but much more expensive
It is possible see my Phono End
Hi-end phono preamplifier
a single C3g per channel with LL1660/10mA 4.5:4 or 4,5:2 will be ok but much more expensive