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About alexh

  • Rank
  • Birthday 28/12/1962

Personal Info

  • Location
    Hereford, , United K
  • Real Name

Wigwam Info

  • Digital Source 1
    Audionote CDT 3
  • DAC
    DDDAC 16 Stack
  • Integrated Amp
    ATC SCA2 Pre amp
  • My Speakers
  • Trade Status
    I am not in the Hi-Fi trade

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  1. I have no experience with mains regeneration or purification so cannot comment on those items. I do however have plenty of experience with balanced mains power supplies. I followed the advice from Philip Newall`s book "Recording Studio Design" and built myself a balanced mains power supply using a 4KVA transformer to power the speakers and a 2KVA transformer to power the source components. That has sorted all the mains problems out. No clicks and pops from various household appliances cycling on an off and no change in sound quality at any time during the day or night. They are perfectly safe if built correctly.
  2. Have you any news on the cables yet ? I use Van Damme quad core and have found them very good indeed and find it hard to believe that balanced cables can be improved by much, but I am open minded about the way Michael approaches the design of cables.
  3. AlexH - I will be getting a 4 deck DDDAC very shortly and at least intially will be running it with capacitor output. I have got some of the capacitors you recommended  to try out since they are very cheap. Did you put capacitors on both the pos and neg outputs - it looks like you have from the pics. Also what did you use for the resistor across the outputs - does the quality of this make much difference. I think also some peole have put a capacitor across the outputs as well. Any help on these issues greatfully accepted. If you are interested the DDAC is going to be fed via SP-DIF from an Allo Digione Signature streamer then into a homebuild very high quality valve pre - Croft Series 3 OTL poweramp and a pair of QUAD 57 ELSs. Using a Chord Mojo at the moment which sounds pretty good but really looking forward to hearing what the DDAC can do! Regards David

  4. I must admit that 5 years ago I would not have considered a NOS Dac due to the measurement side of things. I would look at the -90 Db signal and if it did not look like a sine wave I would reject the player instantly. It was only when I heard an Audionote Dac that I thought that NOS was worth exploring. We can be biased both ways unfortunately. I did not know at the time the AN Dacs were NOS so the technology did not bias me against it ...
  5. I have a multi board DDDAC and I find that CD is perfectly OK to listen to. It is NOS and has power supplies built for good PSSR. it has a single pole filter and Sowter output transformers. To great cost in time, effort and money, I have learned that the less messed about the digital signal is, the better a Dac will sound.
  6. A bit of an update to my previous post. I have just had a good listening session tonight and I thought that I would try the LEDR test again with everything warmed up and listened at a higher volume. It worked, the vertical up did exactly as noted, it went almost up to the ceiling on both channels and back down again. The up and over worked as well from left to right and then right to left. When I tried it the first time I must admit that I went upstairs, turned on the speakers and stuck the CD in without thinking about listening levels or warm up time. So if you have this test available make sure you turn on the system to get it up to its normal temperature, then make sure you listen to the test CD at what would be your normal listening level. I was quite amazed at what can be done with stereo effects, so I stand corrected
  7. I am awfully sorry for not replying to your question, I must confess to not being a regular forum reader. Anyway the answer is: I have made the test board and used the capacitors on + and - output LH and connected that to an XLR socket. I also connected the common and 1 capacitor connected to + pole and connected that to the centre pole of the RCA socket LH. I also connected the common and 1 capacitor connected to - pole and connected that to the centre pole of another RCA socket LH. It means that I can test both + and - output single ended so I know both the + and the - of the LH channels work OK. I have done the same for the RH outputs too. If you look at the picture showing the output view it should be clear now. Happy building, it`s a great Dac :-)
  8. I have a setup CD from Mains Cables R-Us and track 11 - 13 are LEDR tests. Track 11 is supposed to start a chuffing sound behind the base of the and climb vertically around 6Ft. Track 12 checks if the sound starts low outside the left speaker moving up smoothly towards the right hand speaker then repeats it from right to left. Track 13 is a lateral check going left to right then repeat right to left. On all tracks the sound is lateral only, I could not detect any height difference in any of them. However on some of my CD`s, there is some definite height information. Capercaillie Nadura is a case where the accordion player can be heard going back and forth and up and down with the violin player doing the same on the left hand side. My Pink Floyd live CD has surround sound that does go all the way around the room. I think it will depend on the recording and who does the final mastering as to wether there is height information or not.
  9. Try and listen to a DDDAC, I have 44.1 output from an Audionote CDT3 into a DDDAC and I have no desire to change to anything else. It just works so well.
  10. If you go to the " A NOS 192/24 DAC with the PCM1794 (and WaveIO USB input) " DDDAC site, go to post number: 6296. I added a link to get hold of the capacitors.
  11. The picture shown above is a DDDAC board tester, so if anyone is making a DDDAC with multiple boards and needs to know all is OK, send them over to me in Hereford as I can fairly quickly test the individual boards. I made it to test all the boards in my 16 stacker as the last thing you need is a faulty board when all wired up together ....
  12. Go over to the DIYAUDIO DDDAC site, I have discovered a simple way of running a single Tent powered Dac board using capacitors only for the output. It will give you the choice of either RCA or balanced XLR. The sound using a Farnell bench power supply if reference quality
  13. The new wam, Run by A holes for A holes Goodbye
  14. It would be if I ignored the professional advise given to me by people who know what they are doing