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12-27-2008, 04:14 PM
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100+ Head-Fi'er
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Join Date: May 2008
Posts: 323
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There is this power cap 47uF 25V just right beside the power supply socket. That cap gives the supply to the 3 units of DAC power supply cap (which is +5V).
For me, I bypass that 47uF25V cap with green sausage.
Remember the DAC power supply cap is very critical in the signal supply path.
I used Nover for the DAC power supply cap.
__________________
HTPC -> [BlueJeans Fiber Optic] -> DAC-19MK3 -> [ CAST] -> CIA-400 -> [ VDH Goldwater ]-> KEF-CRESTA10 modded
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12-29-2008, 05:28 PM
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Head-Fi'er
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Join Date: Oct 2008
Posts: 54
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did someone measured the voltage on the 2200/4700uf CAPS ?
I have 4700uf supported only 10v and i'm not sure if i can put them on my zero.
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12-30-2008, 12:27 AM
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100+ Head-Fi'er
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Join Date: May 2008
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Please dont put that in.
The voltage across that cap is about 25~27 volt.
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HTPC -> [BlueJeans Fiber Optic] -> DAC-19MK3 -> [ CAST] -> CIA-400 -> [ VDH Goldwater ]-> KEF-CRESTA10 modded
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12-30-2008, 12:59 AM
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Head-Fi'er
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Join Date: Oct 2008
Posts: 54
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thank You for the answer, i'm surelly not gonna put these caps in this case  , so i will look around for a 25v/35v caps.
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12-31-2008, 12:54 AM
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100+ Head-Fi'er
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Join Date: May 2008
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U cant use 25V either.
In HIFI, there is no point trying to save a penny which later can lead to problems.
__________________
HTPC -> [BlueJeans Fiber Optic] -> DAC-19MK3 -> [ CAST] -> CIA-400 -> [ VDH Goldwater ]-> KEF-CRESTA10 modded
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12-31-2008, 04:12 PM
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Head-Fi'er
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Join Date: Oct 2008
Posts: 54
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so why on first picture in this topic ( phase1 power supply section ) is written: "replace with 4700uf Nichicon 25v, than bypass..."
?
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12-31-2008, 10:00 PM
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Headphoneus Supremus
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Join Date: Feb 2008
Location: GreaterTorontoArea in Sub-Urbaine hell
Posts: 3,113
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I measured 21V across the bank of diodes on mine and my line V is rather high at 127V 60 hz AC. 25V cap in that spot is perfectly OK. All Zeros use 25V (2200uf) rated mains filter caps... If it makes anyone feel better than 35V is also fine but once you get above that they get too large in size. A general rule of thumb is to not exceed 50% of nominal V rating for a targeted location for upgrade...either match the V rating of the cap you replace or go a little higher...not go crazy at 100-200% more.........other issues arise when you go down that road...one mentioned previously the other you can look up online.
Happy New Year everyone !!!!!!
I have to go get ready for this evenings events....
Peete.
__________________
Cans :HD650, AKG 240M (HD650 DIY cables SE and Balanced)
Desktop amps : LD MK III (6H30P-i DR's + DIY mods, Jaycar DIY kit amp (major DIY mods), 2 X Audio-gd Compass (test prototype,final version), Audio-gd C-2C W/ Stepped pot Upgrade, Audio-gd Phoenix SS balanced preamp/headamp.
Transports: Auzen Prelude PCI 7.1 SC/ASIO native driver using Media Monkey (all EAC ripped FLAC/Wav), Vanguard CDM12 Pro (BNC mod), HK HD720 (completely upgraded), Audio-gd CD7 Transport.
Sources: FrankenDAC DIY 24/192 dac (HDAMs/Teflon/PIO cap mod), Compass DAC, See Corp Vintage UK TT(Mission arm/Ortofon OM20S MM cart), Yaqin MS12B tube phono preamp, TEAC V530X Tape deck, Audio-gd Reference 1 DAC. C2C DIY pot mod http://www.head-fi.org/forums/f6/ste...1/#post5846722
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01-01-2009, 12:48 AM
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100+ Head-Fi'er
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Join Date: May 2008
Posts: 323
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Hi PP
Happy new year to you. Have u remove the bypass cap to the silmic II ? Please try and see.
__________________
HTPC -> [BlueJeans Fiber Optic] -> DAC-19MK3 -> [ CAST] -> CIA-400 -> [ VDH Goldwater ]-> KEF-CRESTA10 modded
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01-02-2009, 02:50 PM
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Junior Head-Fi'er
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Join Date: Feb 2008
Location: France
Posts: 15
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Hi PP,
I'm new to this forum, but owning a Zero since feb 2008, left aside as not completely satisfactory...
I would be interested with your upgrade kit if still available ...
Has someone found a simple and satisfactory way to hook the Zero to a USB PC outlet ? (presently using an EMU 0404 USB DAC box, very satisfactory, but I need a second system...)
Thank you !
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01-03-2009, 01:43 AM
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Headphoneus Supremus
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Join Date: Feb 2008
Location: GreaterTorontoArea in Sub-Urbaine hell
Posts: 3,113
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sadhill PM me about the kits.
Peete.
PS CC...nope I haven't pulled the bypass caps from the Silmic II's. You are talking about the 4 coupling caps right ? I haven't touched my Frankie for quite sometime now...(LOL...sounds kinda funny).
__________________
Cans :HD650, AKG 240M (HD650 DIY cables SE and Balanced)
Desktop amps : LD MK III (6H30P-i DR's + DIY mods, Jaycar DIY kit amp (major DIY mods), 2 X Audio-gd Compass (test prototype,final version), Audio-gd C-2C W/ Stepped pot Upgrade, Audio-gd Phoenix SS balanced preamp/headamp.
Transports: Auzen Prelude PCI 7.1 SC/ASIO native driver using Media Monkey (all EAC ripped FLAC/Wav), Vanguard CDM12 Pro (BNC mod), HK HD720 (completely upgraded), Audio-gd CD7 Transport.
Sources: FrankenDAC DIY 24/192 dac (HDAMs/Teflon/PIO cap mod), Compass DAC, See Corp Vintage UK TT(Mission arm/Ortofon OM20S MM cart), Yaqin MS12B tube phono preamp, TEAC V530X Tape deck, Audio-gd Reference 1 DAC. C2C DIY pot mod http://www.head-fi.org/forums/f6/ste...1/#post5846722
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01-03-2009, 01:50 AM
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Headphoneus Supremus
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Join Date: Nov 2008
Location: S. FLorida
Posts: 3,265
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Quote:
Originally Posted by Pricklely Peete
PS CC...nope I haven't pulled the bypass caps from the Silmic II's. You are talking about the 4 coupling caps right ? I haven't touched my Frankie for quite sometime now...(LOL...sounds kinda funny).
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If it ain't broke, don't fix it!
Ohhh, forgot what thread I was in !!
Nevermind!
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<<<Les Garten>>> Leave the gun, take the cannoli -- Fat Clemenza circa 1950
Conversation with future Nobel Prize winner Doris Lessing in 1969: Lessing: "You do still have gangsters [in Chicago], don't you?" Studs Terkel: "Yes, but these days they're mostly in business, or politics."
"We hang the petty thieves and appoint the great ones to public office" Aesop
Ich Bin Ein Europeaner!
JOIN TEAM Snake Oil
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01-03-2009, 01:52 PM
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100+ Head-Fi'er
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Join Date: May 2008
Posts: 323
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The 4 coupling cap (two of them actually ) serves to block DC and so the connection is in series. Oops. I need to confirm the green sausage in series mode. I was thinking mundorf 0.1uF .
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HTPC -> [BlueJeans Fiber Optic] -> DAC-19MK3 -> [ CAST] -> CIA-400 -> [ VDH Goldwater ]-> KEF-CRESTA10 modded
Last edited by ccschua; 01-05-2009 at 02:14 PM.
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01-10-2009, 06:41 PM
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Head-Fi'er
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Join Date: Oct 2008
Posts: 54
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does the direction of PIO's legs matters?
None of them is signed as + or -.
Im asking because on underside PCB i saw different soldering between Peet's and someone else photo.
i've marked differences in blue circle
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01-10-2009, 11:35 PM
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100+ Head-Fi'er
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Join Date: Sep 2008
Location: Minneapolis
Posts: 214
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It doesn't matter, film caps and PIO caps like the k42y-2 are non polar.
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Cans - AKG K702, Senn HD580, Stax SR-30
Sources- PC, Frankenzero, Marantz DV4001, Pioneer PL-15R, Rega P2
Amps - 24V Aikido, Cavalli CTH, Millet SS
Buffalo 24 in the works
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01-10-2009, 11:55 PM
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Head-Fi'er
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Join Date: Oct 2008
Posts: 54
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God bless You ;]
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