rabski

Moderator
  • Content Count

    25,203
  • Joined

  • Last visited

  • Days Won

    177

rabski last won the day on January 10

rabski had the most liked content!

Community Reputation

4,337 Excellent

5 Followers

About rabski

  • Rank
    everything in moderation
  • Birthday 17/06/1956

Personal Info

  • Location
    Kettering
  • Real Name
    G. Rumpty Oldgit

Wigwam Info

  • Turn Table
    Well Tempered
  • Tone Arm & Cartridge
    Dynavector XX2/AT-F2
  • SUT / Phono Stage
    Kairsound/tube/other
  • Digital Source 1
    Stable platter
  • Digital Source 2
    Computer and HiFace
  • DAC
    AD1865/AudioSector
  • Integrated Amp
    Many, all types
  • Pre-Amp
    Various, all valve
  • Power Amp/s
    845 SET/KT88PP/other
  • My Speakers
    Living Voice
  • Headphones
    AKG
  • Trade Status
    I am not in the Hi-Fi trade

Recent Profile Visitors

4,387 profile views
  1. I agree on the second point. I've noticed the different volume levels on different albums and tracks, but I see it the same way you do. It suggests they havn't been messed about with. Just like many LPs I have need the volume level changed between them. Absolutely no doubt the library has a load of gaps, but that applies to all the alternative sources as well. The obvious answer is to sign up for everything on the basic quality free of charge, and then pick what suits your own listening. Streaming is never going to be my primary source, but Tidal does seem to have a good selection of things I like, and a good selection of things I don't know (which is more the point). Whether I'll still think it worthwhile when it reverts to full price is another matter.
  2. Whether it is a voltage divider or not, depends on the actual circuit. It can be, but is not always. The point of a voltage divider is that the resistances in line and across the circuit are fixed values, chosen to match each other and thereby avoid possible issues with impedance matching. Really, I should have called it a potential divider, rather than a voltage divider, but it's effectively the same. There is a resistor in the signal line, the fixed resistance of the pot is from signal line to ground, and the wiper of the pot is connected to ground. This is not electrically the same as putting the pot across signal to ground, and taking the 'feed' from the pot wiper.
  3. Many thanks. Rum or not, that's a perfect explanation and makes complete sense. I was looking at it on the basis of one house, not considering the common supply.
  4. I think all the points have been covered. However, I have one query in this regard, and I imagine others may ask the same. I can certainly imagine conditions under which an existing earth arrangement can result in such a problem. I have lived in, and worked on, enough old properties to have seen some real horrors. But assuming the obvious condition that existing earthing arrangements are left well alone (which I hope nobody needs to be reminded of), can you explain how adding a ground spike connection to the existing grounding/earthing could actually result in the possibility of the electrical potential of the earthing circuit being raised? I am genuinely confused by this, as I had understood that with TN-S, where the earth is provided via the supply cable, an additional 'on site' ground would not be considered any problem, though it would not be required.
  5. I don't have a clue to be honest. The DAC needed a small driver download for Windows. I've just checked, and it seems to me that the driver is telling the DAC the rate is 176.4 and the DAC is receiving this. However, it's apparent that this is not the actual output from Tidal. I've just tried changing the streaming setting in Tidal to the lowest quality rate, and the DAC still says 176.4kHz. Frankly Scarlett... It sounds damned good set up as it is and there is a serious audible difference between the lowest quality and MQA. I'll mess about later with MQA vs CD quality, which may well not be audible.
  6. Judging by some of the designs I've seen, quite a few didn't limit it to 'a bit'!
  7. By contrast to others, my system has never sounded better since I stopped drinking, and other miscellaneous chemicals. Mind you, as various Scalford attendees can testify, moderation was never something I was particularly good at. Not drinking has also saved me an awful lot. Not in terms of actual expenditure, but in terms of accidental breakages
  8. I use the Tidal desktop app, but to be honest I have no idea what it's actually outputting when set to MQA in my normal system. The desktop app says streaming is set to MQA, but I'm sending that via a HiFace USB to SPDIF converter and then into my NOS DAC, so there's no way of telling. At the moment, I've got a new toy to play with for review and that has an inbuilt DAC with USB. Using that (direct USB rather than the HiFace) it's showing a 176.4kHz signal. Frankly, all of it sounds damned fine. I'd presumed the Tidal desktop player is doing the decoding MQA decoding??
  9. As per classifieds rules, picture(s) of the actual item are required please.
  10. I understand fully what you mean, but I think we're at cross purposes here. The referencing of neutral to ground is a different matter, and should have no effect here because all the equipment we use in home audio treats neutral as referenced to live for voltage supply, and earth as a safety earth only. No domestic equipment should use neutral as anything other than the other 'half' of the effective supply, or use earth as anything other than a safety earth. I absolutely agree there is a possibility that your 'local' earth may be at a very slightly different potential to that of the earth provided by a grounding rod. However, in the use discussed here, you would connect the two earths together (at the supply pont to the hifi). Therefore, any small potential would be grounded at that point. The equipment is not going to 'see' any potential difference, because it is only going to have one earth connection. The only possible benefit I could see, mind you, is that the earth would possibly be 'quieter', but whether there would actually be any effect, I very much doubt.
  11. I don't see how that could introduce hum. If there was any difference in electrical potential, then it would be grounded by the rod anyway. There would have to be a difference in potential between two things for it to have any adverse effect, but here, everything would share the same common earth. There could be an issue if you use a gounding rod to ground only the signal return and leave this floating from safety earth, of course. For example, if you use a grounding rod to connect to the phono ground, but the rest of the system is (correctly) referenced to mains earth. It did indeed use to be common practice. In fact in many countries, it still is. Mind you, sticking your youngest up a chimney to clean it similarly used to be the done thing, but has gone out of fashion of late.
  12. The other point people tend to forget is that of efficiency. Various regulations in various countries (not to mention marketing pressure) mean that the relative electrical (energy) efficiency of SMPSs is a very valid reason for their use in a lot of equipment.
  13. There is nothing wrong with adding a 'ground' earth IN ADDITION to the mains earth. You can also use ground earth for the connection to the grounding on a turntable or the like. Under no circumstances, ever, should the mains earth be disconnected or replaced by any other arrangement. To do so is not only potentially lethal, but breaks just about every electrical regulation going.
  14. The 'quieter' argument is one I always struggle with, because everything in the house is connected together at the incoming supply and assuming a low electrical resistance (which there certainly should be) then 'noise' has to be common. I suppose it is possible that the circuit breakers provide some isolation, but I can't really see how. Cable screening for mains is primarily designed to stop stuff getting out, rather than to stop things getting in. On the assumption (a different matter) that RFI can be picked up by mains cabling, then it's going to be picked up by all the mains cabling on a common circuit (the house) and screening one part of it logically won't make any difference. As always, with boring hat on, it's your money and your house. However, any installation of electrical supplies has absolutely got to be done using materials compliant with all the relevant standards and carried out in accordance with all the relevant regulations. If you want the 'ultimate', then get a sparks to fit a separate consumer unit for the audio supply, use a radial circuit for each outlet and wire with something heavier than 2.5mm. Will it make a difference? Frankly, I doubt it. The one thing that might, is that it means (hopefully) all the connections will be fresh and tight, which is not always the case with older wiring.
  15. rabski

    Kondo

    I believe so. It was the last time I spoke to OB.