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In Reply to: RE: Battery Powered Phono PreAmp Dynamics posted by Schlep on October 05, 2015 at 07:59:36
A battery tends to have a higher effective series resistance, and a little hysteresis and dropping voltage with loss of charge that has to be designed around. So just putting a battery as a supply with no considerations, could impact dynamics.
If you put in some regulation circuitry with something to make sure the rail doesn't droop with fast or deep current draws, there shouldn't be a giant difference. But ... you are building a power supply to handle the battery, and they have their own issues. In some cases it might be easier to design a quiet power supply (Sutherland seems to be moving in this direction)
Nothing is free, it's all tradeoffs!
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I doubt it.I make an SLA-powered, JFET-based MC or MM phono stage - the 'Muse'. People buy it because:
* it is very quiet
* as an SS phono stage, it has performance which equals commercial ss products 4 or 5 times the price
* but some people do prefer what a tube phono stage delivers - but JFETs deliver better resolution than those tube phono stages which it has gone up against (one buyer replaced a C-J phono stage with my Muse)But you need a cap across the batteries, for best sound. Just like you have filter caps on a mains-powered PS.
Andy
Edits: 10/07/15
According to some very good people I've spoken to, you are dead nuts on about battery supplies. Their suggestion for a simple solution is to feed low impedance capacitors from the battery supply. You still have the clean DC from the Battery and faster response from the capacitors so long as the battery supply is large enough.
what type of caps to use and how many uF! :-))
Andy
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