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In Reply to: RE: LCR posted by Story on July 30, 2020 at 05:11:13
I routinely search the Asylum archives for information I'm in need of, some of it ten to fifteen years old. My intent for posting wasn't to correct you personally, but to keep the archives correct.
I'm glad you like the Lounge, as I've heard a lot of good things about it. I only wish he'd offer a model without on-board AC rectification. A power supply can almost always be improved, like using the Belleson SuperPower regulator, for example, which I had great success with in my Graham Slee Reflex. But the Lounge is much more difficult to do that with (almost no room) than it would be if it had an external DC supply.
I have the 1st production and the power supply implementation is weird. A linear DC wall wart would have been nice. The lack of proper shielding on mine was incomplete as it had a proximity problem with hum fields. Close to anything 120ac was bad. I added some copper tape to the entire enclosure and soldered it to the aluminum plane underneath. I also had no schematic to look at, only a peak inside.
The only other mod was to replace the PS diode with a Schottky. If Mr. Lounge is out there these simple mods are cheap to implement but maybe the newer ones already have them.
*"Bass is the place! The rest is filigree and lace" Doug Sax
I wouldn't imagine that adding a DC barrel jack on the back, and omitting the diodes, voltage regulators, and caps would be that difficult, but that's easy for me to say.
That's interesting that you actually had hum issues with yours because of incoming AC. A DC wall wart (while often quite poor) would at least allow the end user, or Mr. Lounge himself, to build a rock-solid DC supply using either a choke, or the aforementioned Belleson regulators. Perhaps he felt that the compromise of a mediocre DC wal-wart wasn't one he was willing to make.
I still have a McCormack Micro Phono around here somewhere, which also used an external AC wall wart transformer. My intent was to build a better DC external power supply for it, but it would have required extensive modification to the existing internal power supply.
I'm not trying to trash the Lounge in any way. It's very impressive, and I know at least one friend who's told me it sounds very good. I'd just like to see a model offered without AC in the chassis, and the option to improve the power supply.
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