Mezmerize DCB1 Building Thread - Page 52 - diyAudio
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Old 25th April 2012, 11:12 PM   #511
Salas is online now Salas  Greece
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Andreas, good, shows 160mA if with 10R set resistor then. You are welcome, we will read your further news.
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Old 28th April 2012, 12:20 AM   #512
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Default finished my DCB1

Finished my DCB1. Enclosure is a BUD box painted with a ceramic, semi-gloss engine paint from O'reillys. Knob is anodized champaign from parts-connexion. Heat sinks are from a local electronics salvage outfit. Internal wiring is 26awg silver 99.99% (not five 9s thank you ). Antek 50va shielded unit. Current resistors are MP930s mounted off-board on 220 heatsinks.Power switch is a switch/fuse/IEC combo.

If it looks overbuilt, it is. Haven't measured current but it is dissapating some real power. But, who cares, because it sounds great. Rail voltages are very close and offset is very low.

I was using a pot or direct out from my BDP-95 but the DCB1 is a sonic blockbuster in comparison. Which in reality, is just due to a much better impedence match and now we aren't "throwing volume away". In short, it's an amazing non-sounding sounding piece of audio equipment. I'm definitely hearing things in tracks I haven't heard before, and that saying a lot because I listen a lot, my wife wouldn't agree, though.

I'll probably do a Makore front and lid. The only problem that I have is some hum, so I need to fix that. Otherwise it's a winner and I'm not easy to please at all when it comes to audio gear.

Cheers!
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Last edited by ggetzoff; 28th April 2012 at 12:25 AM.
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Old 28th April 2012, 01:12 AM   #513
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Happy that you are happy.

Still this is a simpler one, a Hypno, not a Mez. Regarding your hum, see about dressing closer together and distancing those trafo wires a bit further from the unshielded signal runs. Rotate the toroid a bit. It may be beneficial if your hum ain't due to a system ground loop.
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Old 28th April 2012, 02:44 AM   #514
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Quote:
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Happy that you are happy.

Still this is a simpler one, a Hypno, not a Mez. Regarding your hum, see about dressing closer together and distancing those trafo wires a bit further from the unshielded signal runs. Rotate the toroid a bit. It may be beneficial if your hum ain't due to a system ground loop.
C'mon, any DCB1 porn is good for this thread!

I'll try that. Need to see if I can measure AC anywhere in the case and maybe ground pot case.
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Old 28th April 2012, 03:05 AM   #515
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No DCB1 porn gets class X rating if the photos aren't showing the LEDS alight though.
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Old 28th April 2012, 01:36 PM   #516
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No DCB1 porn gets class X rating if the photos aren't showing the LEDS alight though.
The man wants X-Rated....heh heh, here you go.
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Old 28th April 2012, 02:18 PM   #517
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That's the real McCoy! Excellent.
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Old 28th April 2012, 03:09 PM   #518
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That's the real McCoy! Excellent.


I'm supremely impressed with the way the thing doesn't sonicaly subtract from the source. When it comes to audio, I'm like a nasty food critic, and man does this thing taste good.
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Old 28th April 2012, 03:10 PM   #519
Salas is online now Salas  Greece
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Nice. Did it drop some hum with the AC wires dressing?
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Old 28th April 2012, 03:17 PM   #520
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Nice. Did it drop some hum with the AC wires dressing?
It did, thanks. Right now my son is watching cartoons on that rig so I can't play with it. However, I've still got some probably unrelated amp hum that I need to deal with. I'm talking about very quit hum, but still, hum. I need to take my MM and look for AC in the enclosure (s).

Eventually, I'm going to attach a stepper motor to a stepped attenuator (a double entendre?) and have remote volume control. Otherwise it just need some woodworking and it'll be done.
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