Hi, Quanghao!
Did you try 6H30 valve in this board?
Yesterday I tried to change 5687 to 6H30, so, I revired all jumpers and filaments to get 6.3v, P - 90v.
This resulted in noise and tube ringing during turn on.
Could you suggest what to do?
Did you try 6H30 valve in this board?
Yesterday I tried to change 5687 to 6H30, so, I revired all jumpers and filaments to get 6.3v, P - 90v.
This resulted in noise and tube ringing during turn on.
Could you suggest what to do?
please check all Jum and the transformer for it,
filaments 6h30 need min 2A for 6.3V
60h30 will sound more balanced, and more preferably 5687.
thanks
And what should be the values for R1 and R11?
I have 240v 90 mA AC input and P voltage is only 83v.
I have 240v 90 mA AC input and P voltage is only 83v.
Hi Hao!
I still have a couple of questions concerning LL1660 board:
1. I should use LL1660 10 ma version?
2. For 6h tube - which one (6H30 or 6H6)?
3. R1 and R11 values for power supply?
Thanks!
I still have a couple of questions concerning LL1660 board:
1. I should use LL1660 10 ma version?
2. For 6h tube - which one (6H30 or 6H6)?
3. R1 and R11 values for power supply?
Thanks!
Hi, Hao!
It seems that you have reworked the SSHV supply on the latest LL1660 board, as it has 2 MJE350 instead of 1 before.
Maybe you can give a circuit scheme?
Thanks!
It seems that you have reworked the SSHV supply on the latest LL1660 board, as it has 2 MJE350 instead of 1 before.
Maybe you can give a circuit scheme?
Thanks!
Dac End
Hi,
I’ve just completed a comparison of the your Dac End and the dCS setup. I had Russian Teflon output capacitors and Jensen in Dac End and had it set up so I could switch between them. They were very similar but I think I preferred the Jensen. The other listener preferred the Russian Teflon caps.
The The dCS Verdi transport was used for both tests.
Again the sound of the dCS with Verona Master clock and Purcell Upsampler and Elgar Dac was indistinguishable from the Dac End. I may have preferred the dCS setup but the other listener preferred the Dac End. I would not have been able to pick one over the other in a blind AB comparison
The dCS setup is made in the UK but was Stereophile no 1 rated digital component for a number of years and according to them sold as new for $41000. It was superceded by later and more expensive dCS products.
Neither system sounded as good as my vinyl so even when you pay $41,000 a much less expensive vinyl setup will sound better.
I expect I will now sell my dCS system and keep the Dac End. Hopefully anyone reading this review will not be a prospective buyer.
I did the comparison using Stax headphones rather than amps and speakers as I think they are more detailed,
I would like do do a comparison using the Lundahl LL1660AM amopphous core output transformers. I would be curious to see if the Dac End would then outperform the dCS
Ronan Daly
Hi,
I’ve just completed a comparison of the your Dac End and the dCS setup. I had Russian Teflon output capacitors and Jensen in Dac End and had it set up so I could switch between them. They were very similar but I think I preferred the Jensen. The other listener preferred the Russian Teflon caps.
The The dCS Verdi transport was used for both tests.
Again the sound of the dCS with Verona Master clock and Purcell Upsampler and Elgar Dac was indistinguishable from the Dac End. I may have preferred the dCS setup but the other listener preferred the Dac End. I would not have been able to pick one over the other in a blind AB comparison
The dCS setup is made in the UK but was Stereophile no 1 rated digital component for a number of years and according to them sold as new for $41000. It was superceded by later and more expensive dCS products.
Neither system sounded as good as my vinyl so even when you pay $41,000 a much less expensive vinyl setup will sound better.
I expect I will now sell my dCS system and keep the Dac End. Hopefully anyone reading this review will not be a prospective buyer.
I did the comparison using Stax headphones rather than amps and speakers as I think they are more detailed,
I would like do do a comparison using the Lundahl LL1660AM amopphous core output transformers. I would be curious to see if the Dac End would then outperform the dCS
Ronan Daly
I just bought an AD1865 Dac-End3 kit from an other user. It is almost all assembled, configured for the 6H30 tube.
One question, Do I still need to install the 120uH inductor at the dac output, or I can feed the dac directly into the Tueb IV stage, keeping the Caddock IV resistor on the DAC PCB naturally.
Any help appreciated. Thanks.
One question, Do I still need to install the 120uH inductor at the dac output, or I can feed the dac directly into the Tueb IV stage, keeping the Caddock IV resistor on the DAC PCB naturally.
Any help appreciated. Thanks.
Attachments
Hi, Algar!
Here you can find the basic circuitry: http://audiodesignguide.com/DACend2/index.html
With your I/V stage inductors should be soldered in.
Daniil
Here you can find the basic circuitry: http://audiodesignguide.com/DACend2/index.html
With your I/V stage inductors should be soldered in.
Daniil
These are the ones on mine, from Mouser: 588-FA-T220-51E
Thanks danielkol but my pcb are the latest version, DAC and Tube IV date 31/5/2011. The DAC shunt and DAC layout are different. The IV PCB layout is different as well. I have the correct schematics, but not the exact pcb silkscreen. I should be ok. I was just wondering about these inductors. I'll post my complete Excel parts file if anyone interested, it is kind of an old thread.
Thanks danielkol but my pcb are the latest version, DAC and Tube IV date 31/5/2011. The DAC shunt and DAC layout are different. The IV PCB layout is different as well. I have the correct schematics, but not the exact pcb silkscreen. I should be ok. I was just wondering about these inductors. I'll post my complete Excel parts file if anyone interested, it is kind of an old thread.
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Try both options: without and with the inductors and decide which one sounds better to your ears. I remember I was trying that for a number of weeks until I finally decided do stay with the inductors.