New or Old DAC

I am still awaiting an answer! How is A.C. Current that has been Rectified to D.C. Current, and is Voltage Regulated, and now supplies Analog as well as Digital Stages, Analog Based? Direct Current is Direct Current regardless if it is supplying Analog or Digital Stages, perhaps at a different Voltage, but it is still Direct Current! What is your basis of, "Analog Based" in Direct Current?

Seems pretty apparent, at least to me, that all John meant is that the circuitry (or at least most of the circuitry) in most power supplies is analog circuitry utilizing analog components.

Regards,
-- Al

PettyOfficer -- I agree with at least most of your previous post, but I think that a misunderstanding may have arisen in this thread due to the term "power supply" being used by different posters to mean different things.

No one is saying that the dc current itself is "analog based." What is analog based is the circuit that generates it. The rectifying stage circuit IS the power supply, and it is an analog circuit.

The term "power supply," as used by most electrical engineers (of which I am one), and as I believe John was using the term, refers to a circuit, consisting of the rectifier, resistors, capacitors, etc., that you alluded to.

I can see how the words "power supply," in normal English usage, could be interpreted as referring to the current which is generated by that circuit, but it seems pretty clear that is not what was meant in this case.

Regards,
-- Al

I don't know. There may still be a conspiracy unfolding....at the very least, some real chain-pulling – and at worst, truly gross conceptual error…

Life IS too short for (this) type of behavior….

Huh? What are you talking about, Ben? Or are you just trying to be inflammatory?

-- Al

Almarg- what are you trying to tell me- that no DAC in existence can utilize Vacuum Tubes in its Rectifying Stage as a Power Supply to its Digital Circuits? And you agree with Jmcgrogan2 in this regard?

No, I did not say that, and you are quite correct that audio components of all kinds can and often do utilize tube-based rectifier stages/power supplies, which in some components may supply power to digital as well as analog circuits.

JMCGrogan2: Remember, no one puts tubes, fancy caps or resistors in the digital to analog convertor, these premium parts go in the analog output stage.

Pettyofficer: Sorry to disagree, my Space Tech Lab DA-64XT DAC utilizes an STR-104 Tube Rectifier. This Rectifier does have two very, very large Tubes that supply power to all of the components within the DAC.

Again, I think there is a misunderstanding here. You (PO) were referring to the DAC component in the sense of the entire component, while John was referring (I believe) to "digital to analog converter" in the sense of the dac circuit or chip within the overall component (as distinguished from the power supply within the overall component). Notice his reference to the analog output buffer stage (as distinguished from the d/a converter stage), which would seem to confirm this interpretation.

Then if the Rectifying Stage Circuit IS the Power Supply, and it utilizes Tubes, then Jmcgrogan2's claim that no-one uses Tubes-fancy Caps-or Resistors in the Power Supply for Digital Stages is completely bogus.

If that is what John meant, then yes, he was clearly wrong. But I suggest that you consider the possibility that, as I indicated immediately above, he was using the phrase "digital to analog converter" in a different sense than you interpreted it.

Regards,
-- Al

Why do you and Jmcgrogan2 insist that there is a distinction between Two Direct Current Power Supplies that come from the same source?

We don't (or at least I don't, and I don't think John does either). I suggest that you re-read my previous posts.

Need I remind anyone that these two DC Power Supplies come from the same source?

No, you needn't remind anyone. My point is that I don't think anyone has said anything to the contrary.

Regards,
-- Al

Mine is very simple, when Vacuum Tubes are used in the Rectifying Stage of a DAC, they become part of the power supply to both the Analog and Digital Stages!

Agreed 100%.

Why is this so hard for everyone to understand?

It isn't hard to understand -- in fact no one disagrees with your point. The problem is that you refuse to accept a reasonable interpretation of our posts, and continue to insist that our posts were saying something unreasonable and obviously wrong.

That is my last word on the subject.

Regards,
-- Al