Recent content by Atmasphere

  1. Atmasphere

    A Ground Isn't Just Rods

    Again, that's only if the internal grounding scheme of your equipment is compromised in some fashion. The fact you hear that is telling you something!
  2. Atmasphere

    A Ground Isn't Just Rods

    @Kingrex The real issue here is how the audio system is affected. If the components in the system are designed properly (IOW how well their internal grounding scheme is designed) then the house grounding system really won't have any effect other than safety and storm issues. Remember that amp...
  3. Atmasphere

    Do Mobile Fidelity Vinyl Re-issues Have a Digital Step in the Process?

    This statement isn't correct. Spend any time around a mastering lathe and you'll see why. It takes some time to get to know the ropes. If you don't know what you are doing, you will blow up the cutter head which is unpleasant at best. Put another way there's no algorithm- its still an art.
  4. Atmasphere

    Any cyclists here?

    Reynolds stainless 953? Of course that's steel... 953 allows the frame to use traditional tubing diameters but go even lighter.
  5. Atmasphere

    What A Neat Idea

    Power amps usually don't have regulated power supplies. But if they were they would be immune to AC wall power issues as long as pesky ground problems were not in the mix.
  6. Atmasphere

    Any cyclists here?

    Buffalo Valley?
  7. Atmasphere

    Phono cables - the most sensitive and critical cable in your system

    The LOMC cartridge has an inductance which is in parallel with a capacitance of the tonearm cable. An inductance in parallel with a capacitance is how radios tune stations... This creates a high Q electrical resonance, usually between 100KHz and 5MHz. It can go into excitation, activated by...
  8. Atmasphere

    Phono cables - the most sensitive and critical cable in your system

    That's because SUTs block the RFI generated by a LOMC and the capacitance of the tonearm cable. If the phono preamp is sensitive to RFI, the user very well might prefer the SUT because the phono preamp will perform better. But if the phono section is immune to RFI the SUT can easily be seen as...
  9. Atmasphere

    A Bright Shining Lie…Why ignoring an inconvenient truth is stifling system performance a blog from Roy Gregory

    No. The input is direct-coupled to the balanced differential voltage amplifier. Its output is capacitivily coupled to the driver circuit, which in turn is direct coupled to the power tubes which drive the speaker load directly. The caps are thus a smaller value (typically 0.1uF) but still...
  10. Atmasphere

    Phono cables - the most sensitive and critical cable in your system

    Usually the ground wire is tied to the arm tube since that is a shield for the cartridge wires. Its unusual to say the least (I've worked on thousands of turntables as I put myself through college repairing consumer electronics and never seen that done) to tie it to the hardware that holds the...
  11. Atmasphere

    A Bright Shining Lie…Why ignoring an inconvenient truth is stifling system performance a blog from Roy Gregory

    :D Sorry- that might be the story but that isn't what you find! There's nothing military or classified in there...
  12. Atmasphere

    Phono cables - the most sensitive and critical cable in your system

    It seems unlikely to me that the phono cable is a source of hum (which is different in my book from buzz), unless the cable isn't shielded. If routed past an AC motor though all bets are off! More likely is that the phono preamp itself is sitting in a hum field, for example near a power...
  13. Atmasphere

    A Bright Shining Lie…Why ignoring an inconvenient truth is stifling system performance a blog from Roy Gregory

    I hope you don't have to service that preamp. They are a bit tricky to disassemble. Its old enough now that changing out filter caps might not be a bad idea.
  14. Atmasphere

    A Bright Shining Lie…Why ignoring an inconvenient truth is stifling system performance a blog from Roy Gregory

    We've been building 'direct coupled' tube amps for nearly half a century. A bit more direct-coupling than the Whammerdyne... I do agree direct-coupling can really help with transparency, as long as you pay attention to your power supply issues. Anything made by Dale Pitcher has to be a bit...
  15. Atmasphere

    A Bright Shining Lie…Why ignoring an inconvenient truth is stifling system performance a blog from Roy Gregory

    I've heard plenty that sound flat- I know exactly what you're talking about. We've got one in the shop and its really boring IMO. When I first heard a class D amp 20 years ago I was wondering if it was a joke. A lot I've head since didn't seem much better so I don't think we're talking past each...

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