Xono current draw

Marra · 3rd December 2011, 12:20 PM

Does anyone know the maximum current draw of the Xono phono stage?
Thanks Marra

cyclotronguy · 5th December 2011, 07:51 PM

It's Class A device, power draw is constant at about 18 watts, including the losses in the powersupply.

Cyclotronguy

Marra · 5th December 2011, 08:36 PM

Thanks cyclotronguy. I was hoping someone would tell me what it uses in terms of plus and minus in milliamps so that I can build the appropriately rated Salas Bib shunt regulators to power it.

cyclotronguy · 5th December 2011, 09:02 PM

Original X-ono large PS has very little in the way of regulation. Small PS had none. Sounded pretty spectacular without.

Cyclotronguy

Marra · 6th December 2011, 07:58 AM

Quote:

Originally Posted by cyclotronguy

Original X-ono large PS has very little in the way of regulation. Small PS had none. Sounded pretty spectacular without.

Cyclotronguy

How true; but as I have bought and part stuffed the regulator boards it seems a shame not to give them a try.
I'll reread the Ono'Xono threads and see if the current draw gets mentioned in them.

cyclotronguy · 6th December 2011, 05:41 PM

As previously indicated CA 15W from the wall on production pieces, so +/- 8watts ought to cover it. BTW standard PS was +/- 44 Vdc.

Cyclotronguy

Marra · 10th December 2011, 12:47 PM

PCB Voltages & Current Measurements:

Q24 emitter
24.8V (Schematic 26V)

Q14 emitter
11.6V (Schematic 15V), Q10-Q13 are 2SK170BL Type

Q15 drain: 11.9V

Q10-Q13 Is: 4.1, 4.2, 4.2, 4.1ma (PCB #1)
Q10-Q13 Is: 4.2, 4.3, 4.4, 4.4ma (PCB #2)

D5 Anode: -27.8V

R67-R53: 1.2V = 8ma Ie Q16,Q17
R64: 0.9V = 1.9ma Is Q19

R28: 0.35V, adjusted with R25

Output FETS are warm, not too hot.

Supply Currents:
+30V, 120ma
-30V, 80ma

I knew I'd read it somewhere.

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3rd December 2011, 12:20 PM	#1
Marra diyAudio Member Join Date: Nov 2009 Location: Near Lincoln	Xono current draw Does anyone know the maximum current draw of the Xono phono stage? Thanks Marra

5th December 2011, 07:51 PM	#2
cyclotronguy diyAudio Member Join Date: Sep 2001 Location: Northern California	It's Class A device, power draw is constant at about 18 watts, including the losses in the powersupply. Cyclotronguy

5th December 2011, 08:36 PM	#3
Marra diyAudio Member Join Date: Nov 2009 Location: Near Lincoln	Thanks cyclotronguy. I was hoping someone would tell me what it uses in terms of plus and minus in milliamps so that I can build the appropriately rated Salas Bib shunt regulators to power it.

5th December 2011, 09:02 PM	#4
cyclotronguy diyAudio Member Join Date: Sep 2001 Location: Northern California	Original X-ono large PS has very little in the way of regulation. Small PS had none. Sounded pretty spectacular without. Cyclotronguy

6th December 2011, 05:41 PM	#6
cyclotronguy diyAudio Member Join Date: Sep 2001 Location: Northern California	As previously indicated CA 15W from the wall on production pieces, so +/- 8watts ought to cover it. BTW standard PS was +/- 44 Vdc. Cyclotronguy

10th December 2011, 12:47 PM	#7
Marra diyAudio Member Join Date: Nov 2009 Location: Near Lincoln	PCB Voltages & Current Measurements: Q24 emitter 24.8V (Schematic 26V) Q14 emitter 11.6V (Schematic 15V), Q10-Q13 are 2SK170BL Type Q15 drain: 11.9V Q10-Q13 Is: 4.1, 4.2, 4.2, 4.1ma (PCB #1) Q10-Q13 Is: 4.2, 4.3, 4.4, 4.4ma (PCB #2) D5 Anode: -27.8V R67-R53: 1.2V = 8ma Ie Q16,Q17 R64: 0.9V = 1.9ma Is Q19 R28: 0.35V, adjusted with R25 Output FETS are warm, not too hot. Supply Currents: +30V, 120ma -30V, 80ma I knew I'd read it somewhere.

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