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In Reply to: RE: Speculation posted by Tony Lauck on November 26, 2015 at 08:47:22
I agree and this is good practice.
To categorically say that no additional bypassing should be done when powering a usb chip thru a battery is theoretically and practically unsustainable. And to add that trickle charging by a power supply at the same time does not affect the operation or SQ is suspicious. All other battery power devices I have come across disconnect the charging power source when playing audio.
I actually get a big improvement in SQ powering the Regen with a 7.4V LiPO battery that should last for a long time.
In the days to come I shall directly power the Regen with a 3.3V LiFePO4 battery and a 3.3V Jung type regulator with preregulator, and compare/post sonic impressions.
My recent encounter with a major dealer's dead LiPO nano powered devices was a reminder that battery supplies do not last.
Follow Ups:
Anybody with half a brain cell left intact would know that there are bypass caps at the load i.e. at all the power pins of the USB Hub chip & on the PS input pin of the clock.In this thread, I am giving my long experience in using these batteries with chargers - you can be suspicious all you like about this but experience counts for a lot more than uninformed speculation.
I'm sure the people who try this will be able to report on the other thread who is correct & who is uninformed.
Edits: 11/27/15
Is 20 years longer than 5 years? What education and training in electronics do you have?A small capacitor next to the usb chip serves only as local hf bypass. Half a brain should know this.
You are advising everyone to bypass any of the protection afforded by the power supply chip in the Regen, and run an unrestrained high current dc supply into someone's expensive usb dac with no caution at all.
From a manufacturer, this is unacceptable advice.
Edits: 11/27/15
Are you trying to say you have 20 years experience using these LiFePo4 batteries - that would be some claim as the technology wasn't available to the public, 20 years ago.Why not plague some other thread with your BS or has everybody already cottoned onto you & ignores you?
It would seem that is the prudent thing to do - bye!
Edit: I see you edited your post since I replied. Yes local HF bypass is all that's needed. The battery itself acts as a very large capacitor with very low internal impedance & capability of delivering gobs of current as fast as required. The move of digital to lower voltages has resulted in higher current spikes & these batteries answer most, if not all of the requirements required for a good digital PS.
But then I expect you will come up with more BS speculative issues & snide remarks which will be ignored
Edits: 11/27/15 11/27/15 11/27/15 11/27/15
The issue I have with trickle charging the battery while listening to music is that there remains a potential coupling path for power line noise. This may or may not be a factor in any given environment, but it is at least a potential confounding variable and source of frustration.
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
Sure, Tony, I had the same thoughts when I first started on this journey with batteries - until I tried it :) They seem to also act as very large capacitors - capacitance in the Farads. The distinction between capacitors & batteries is becoming hazy - with Lithium capacitors 40F to 270F - the new term for these are energy storage devicesOthers have found no audible difference between charger connected or not in various configurations with various chargers & at least one poster here has reported the same - theob, on the other thread.
Edits: 11/27/15 11/27/15 11/27/15 11/27/15
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