derek92994
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Thank you Sir, what are the quality of the capacitors like?
Comparing battery-powered phono pre-amps, from RS ($$) to ASR ($$$$) ... and beyond!
- Thread starter NeverSatisfied
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derek92994
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No model number at all on mine, top or bottom.
derek92994
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I see some wima caps in there, maybe also upgrade the electrolytics to nichicon muse.
derek92994
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With my limited knowledge, I don't fully understand what he has done with all the component changes, but there has to be a reason for them.
NeverSatisfied
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Modded board on the left, your board on the right?
mr_rye89
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I wonder if the 10uf output coupler could be eliminated by using a dual rail -/+ power supply? Just an idea….
derek92994
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Could that be achieved using 2x 9volt batteries?
mr_rye89
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I think so
J!m
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I’m pretty sure you can too. Wyn indicated his preamp could be run off a pair of 9V batteries and it uses a +/- power supply.
derek92994
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That would be handy, after about 15 hours of solid use on a stock unit. the battery went from 9.5v to 9.2v. Im curious as to what the battery life is on a standard duracell alkaline battery.
mr_rye89
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I’m contemplating a new phono stage, I like my diy EAR 834 knockoff, but it’s pretty noisy cuz toobs. I have a TCC 750 around I might play with, it can run on batteries…..
J!m
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I have a spare board for the v.1.3 Wyn Palmer preamp if you’re interested.
The BOM is at Audiokarma.
The BOM is at Audiokarma.
J!m
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I got four nice rechargeable D cells from China a while back.
The Sony D5M uses two, and regular cells don’t last too long. These last at least as long; probably longer, and have a mini YSB plug in them with an LED, so no fancy charger needed. Not expensive. eBay of course.
It started with D adapters that take three AA batteries each, since I’m already using those everywhere. But the single D has higher mwH than any three rechargeable AAs combined.
The D5 steps up from 3V to 6V so voltage isn’t an issue.
The Sony D5M uses two, and regular cells don’t last too long. These last at least as long; probably longer, and have a mini YSB plug in them with an LED, so no fancy charger needed. Not expensive. eBay of course.
It started with D adapters that take three AA batteries each, since I’m already using those everywhere. But the single D has higher mwH than any three rechargeable AAs combined.
The D5 steps up from 3V to 6V so voltage isn’t an issue.