MHDT Havana DAC
Apr 17, 2012 at 6:37 AM Post #1,876 of 2,680

mako44

100+ Head-Fier
Joined
Jan 16, 2012
Posts
159
Likes
10
Quote:
 Ignat(niamex) suggested to replace one of 47uF (marked on the photo) with higher value like 100uF. I will check it by the next occasion.
 

 


I should have done it sooner. I changed it for elna silmic 100uf 2 days ago, difference is welcome in my case. Before that basses were rough in many ways, now it's tighter and more balanced. I don't hear these low frequencies that were disturbing me on some recordings by trailing around where they shouldn't. Recommended
 
 
 
Apr 17, 2012 at 12:52 PM Post #1,877 of 2,680

loserica

100+ Head-Fier
Joined
Apr 14, 2009
Posts
459
Likes
22


Quote:
Nice ! It's tempting. I'm not experienced enough to do it even with the good explanations of Robert but I may find someone if needed. Looks great anyway according to you 
normal_smile%20.gif

Did you remove C5 Ioserica ? I wonder if it's not more or less the same or an easier way to approach the same results... Anyway if I put R core I guess I'll have to replace C5 back or the dac should be too clear this time.
Yes sure, it's very useful :)

 
Yes, I removed the C5 caps! and I think it was the right decision (Thank's Robert for suggestions!
smile.gif
). Sound is rich enough in highs and far from being dark by removing C5 cap. Superior texture!
Few more words: R-Core contributed greatly to improving the speed of the dac, I got a better separation on low and medium frequencies and I discover new voice inflections (of course, higher decay, as I said). Overall sound is clearer, I think they have gone some distortion that I had before the higher frequencies; superior extension on the bass, mid bass, mid and highs! in a word: natural and beautiful!
 
 
Apr 17, 2012 at 1:27 PM Post #1,878 of 2,680

mako44

100+ Head-Fier
Joined
Jan 16, 2012
Posts
159
Likes
10
Really ? I'm very surprised you can use both r-core and c5 removed together, I thought it would be too clear. Well it worthes a try to judge by myself, i'll do it if i have the opportunity. Thanks for your comments
 
By the way, to get more resolution you can try Clarity mr caps on c12 & input caps they go a tad farer than jupiter. But are more neutral too, you may not like, and I still find a lack of resolution on mine.
 
Apr 19, 2012 at 3:01 PM Post #1,879 of 2,680

niamex

100+ Head-Fier
Joined
Jun 3, 2010
Posts
102
Likes
12
 
Quote:
I should have done it sooner. I changed it for elna silmic 100uf 2 days ago, difference is welcome in my case. Before that basses were rough in many ways, now it's tighter and more balanced. I don't hear these low frequencies that were disturbing me on some recordings by trailing around where they shouldn't. Recommended
 
 

 

As a matter of fact that was suggested earlier by someone in this thread - I went further and after the good result with 100 uF Elna Silmic I have installed one Elna 47 uF in parallel /from the bottom of the first one/ - so altogether 147 uF and in my case the picture got even better - more open and articulated bass - you have to try that. Please also note I have replaced the output caps with Mundorf Silver/Oil 2.7 uF.
Cheers,
Ignat
 
Apr 19, 2012 at 8:00 PM Post #1,880 of 2,680

kendrab

New Head-Fier
Joined
Aug 7, 2011
Posts
29
Likes
10
I ordered the last of the parts for my Havana A/A convertor today. It will be fairly similar to Robeeert1's dac.
 
I decided to go a little further and replace the 5 remaining 0.1uf capacitors with Mundorf Silver Oil versions. The .22uf capacitor will be replaced with a Mundorf Silver Gold capacitor. I ordered up to Blackgate FK series 100uf25V capacitors to go beneath the C5 capacitor area of the PCB board. The two output capcitors are V-Cap 2.0uf250VDC, and they will each be bridged by a V-Cap CuTF series 0.1uf600VDC capacitor. I am upgrading to a Vampire Wire BNC, and will replace the RCA output jacks with WBT 0234 versions.
 
I have one of those R-Core 35W transformers, and will be mounting it (and everything else) in a chassis 7" wider than stock. This way, the transformer can mount directly to the chassis at the left side, and there will be 2" of extra room on the right so all the capacitors will fit.
 
I expect the parts Monday or Tuesday of next week. At that time, I will be taking it in to a well respected electronis repair shop to have the mods done. Once I get it home, I will put 500 hrs on it to break everything in before sitting down for a serious listening session.
 
When I get it back, I will post a few pictures...
 
Apr 28, 2012 at 6:23 AM Post #1,881 of 2,680

loserica

100+ Head-Fier
Joined
Apr 14, 2009
Posts
459
Likes
22
 
Quote:
To increase the resolution to maximum level (in your case) you have to replace the chips with Japanese "K" ones (but real ones, only taken out from the vintage CD player, not from ebay or not from other available stocks, only vintage ones!!!!!!!),
you will hear *slightly* more resolution (easily noticeable), but will lose texture and musicality a little. I prefer Korean "K" chips. I don't think the Oscon caps can increase the resolution, but try them.

Finally arrived Oscon capacitors (Sanyo Oscon, 4,7uF, 10V; 10 pcs. I bought from here: http://int.rsdelivers.com). Six were implemented on digital section and four on analog section of the dac. What is new about this movement? Enough to deserve. Notable differences are in terms of texture and micro details. Layering and micro details,...I'm glad because Havana is capable of its! Ambient noises, are finally present in audition. Higher frequencies, they are more present, but played very natural. I think we can speak of a slight widening of the resolution at this time! (it takes several days of burning, of course ...)
I recommend this upgrade.
smile.gif

 
and a picture:
 

 
Apr 28, 2012 at 7:47 AM Post #1,882 of 2,680

s1rrah

Headphoneus Supremus
Joined
Sep 27, 2007
Posts
2,640
Likes
181
 
Quote:
 
Finally arrived Oscon capacitors (Sanyo Oscon, 4,7uF, 10V; 10 pcs. I bought from here: http://int.rsdelivers.com). Six were implemented on digital section and four on analog section of the dac. What is new about this movement? Enough to deserve. Notable differences are in terms of texture and micro details. Layering and micro details,...I'm glad because Havana is capable of its! Ambient noises, are finally present in audition. Higher frequencies, they are more present, but played very natural. I think we can speak of a slight widening of the resolution at this time! (it takes several days of burning, of course ...)
I recommend this upgrade.
smile.gif

 
and a picture:
 

 
Awesome.
 
 
 
May 5, 2012 at 8:23 PM Post #1,884 of 2,680

Pingfloid

100+ Head-Fier
Joined
Oct 11, 2011
Posts
201
Likes
15
Hi.
 
Do you have a part-list that includes the capacitors? I want to prepare a shopping list for the upgrade, and that would make life a lot of easier. 
 
I have this one that includes the resistors and some caps. I do not remember who posted it. Thank You!!
 
 
[size=small]ID[/size] [size=small]Value[/size] [size=small]Spec /Grade[/size] [size=small]Parts[/size]
[size=small]R1[/size] [size=small]301R[/size] [size=small]0.6W, 1%[/size] [size=small]Resistor[/size]
[size=small]R2[/size] [size=small]100R[/size] [size=small]0.6W, 1%[/size] [size=small]Resistor[/size]
[size=small]R3[/size] [size=small]1K04[/size] [size=small]0.6W, 1%[/size] [size=small]Resistor[/size]
[size=small]R4[/size] [size=small]1K04[/size] [size=small]0.6W, 1%[/size] [size=small]Resistor[/size]
[size=small]R5[/size] [size=small]121R[/size] [size=small]2W, 1%[/size] [size=small]Resistor[/size]
[size=small]R6[/size] [size=small]1K0[/size] [size=small]0.6W, 1%[/size] [size=small]Resistor[/size]
[size=small]R7[/size] [size=small]1K0[/size] [size=small]0.6W, 1%[/size] [size=small]Resistor[/size]
[size=small]R8[/size] [size=small]243R[/size] [size=small]0.6W, 1%[/size] [size=small]Resistor[/size]
[size=small]R9[/size] [size=small]75R[/size] [size=small]0.6W, 1%[/size] [size=small]Resistor[/size]
[size=small]R10[/size] [size=small]270R[/size] [size=small]1W, 1%[/size] [size=small]Resistor[/size]
[size=small]R11[/size] [size=small]5K62[/size] [size=small]0.6W, 1%[/size] [size=small]Resistor[/size]
[size=small]R12[/size] [size=small]1K0[/size] [size=small]0.6W, 1%[/size] [size=small]Resistor[/size]
[size=small]R13[/size] [size=small]270R[/size] [size=small]1W, 1%[/size] [size=small]Resistor[/size]
[size=small]R14[/size] [size=small]5K62[/size] [size=small]0.6W, 1%[/size] [size=small]Resistor[/size]
[size=small]R15[/size] [size=small]1K0[/size] [size=small]0.6W, 1%[/size] [size=small]Resistor[/size]
[size=small]R16[/size] [size=small]39R2[/size] [size=small]2W, 1%[/size] [size=small]Resistor[/size]
[size=small]R17[/size] [size=small]2k26[/size] [size=small]0.6W, 1%[/size] [size=small]Resistor[/size]
[size=small]R18[/size] [size=small]1K0[/size] [size=small]0.6W, 1%[/size] [size=small]Resistor[/size]
[size=small]R19[/size] [size=small]475K[/size] [size=small]0.6W, 1%[/size] [size=small]Resistor[/size]
[size=small]R20[/size] [size=small]475K[/size] [size=small]0.6W, 1%[/size] [size=small]Resistor[/size]
[size=small]R21[/size] [size=small]475K[/size] [size=small]0.6W, 1%[/size] [size=small]Resistor[/size]
[size=small]R22[/size] [size=small]1K0[/size] [size=small]0.6W, 1%[/size] [size=small]Resistor[/size]
[size=small]R23[/size] [size=small]100R[/size] [size=small]0.6W, 1%[/size] [size=small]Resistor[/size]
[size=small]R24[/size] [size=small]402R[/size] [size=small]0.6W, 1%[/size] [size=small]Resistor[/size]
[size=small]R25[/size] [size=small]33R2[/size] [size=small]0.6W, 1%[/size] [size=small]Resistor[/size]
[size=small]R26[/size] [size=small]33R2[/size] [size=small]0.6W, 1%[/size] [size=small]Resistor[/size]
[size=small]R27[/size] [size=small]100R[/size] [size=small]1W, 1%[/size] [size=small]Resistor[/size]
[size=small]R28[/size] [size=small]100R[/size] [size=small]1W, 1%[/size] [size=small]Resistor[/size]
[size=small]R29[/size] [size=small]20K0[/size] [size=small]1W, 1%[/size] [size=small]Resistor[/size]
[size=small]R30[/size] [size=small]20K0[/size] [size=small]1W, 1%[/size] [size=small]Resistor[/size]
[size=small]R31[/size] [size=small]390K[/size] [size=small]1W, 1%[/size] [size=small]Resistor[/size]
[size=small]R32[/size] [size=small]390K[/size] [size=small]1W, 1%[/size] [size=small]Resistor[/size]
[size=small]R33[/size] [size=small]100R[/size] [size=small]1W, 1%[/size] [size=small]Resistor[/size]
[size=small]R34[/size] [size=small]100R[/size] [size=small]1W, 1%[/size] [size=small]Resistor[/size]
[size=small]RL[/size] [size=small]1K53[/size] [size=small]0.6W, 1%[/size] [size=small]Resistor[/size]
[size=small]H1[/size] [size=small]BRED[/size]   [size=small]BRED[/size]
[size=small]H2[/size] [size=small]BRED[/size]   [size=small]BRED[/size]
[size=small]D1[/size] [size=small]2A/800V[/size] [size=small]1N5062[/size] [size=small]DIODE[/size]
[size=small]D2[/size] [size=small]2A/800V[/size] [size=small]1N5062[/size] [size=small]DIODE[/size]
[size=small]D3[/size] [size=small]2A/800V[/size] [size=small]1N5062[/size] [size=small]DIODE[/size]
[size=small]D4[/size] [size=small]2A/800V[/size] [size=small]1N5062[/size] [size=small]DIODE[/size]
[size=small]D5[/size] [size=small] Led Blue[/size] [size=small]3mm[/size] [size=small]Led[/size]
[size=small]D6[/size] [size=small] Led Green[/size] [size=small]3mm[/size] [size=small]Led[/size]
[size=small]D7[/size] [size=small]Led Red[/size] [size=small]3mm[/size] [size=small]Led[/size]
[size=small]DU[/size] [size=small]Led Yellow[/size] [size=small]3mm[/size] [size=small]Led[/size]
[size=small]D8[/size] [size=small]2A/800V[/size] [size=small]1N5062[/size] [size=small]DIODE[/size]
[size=small]D9[/size] [size=small]2A/800V[/size] [size=small]1N5062[/size] [size=small]DIODE[/size]
[size=small]D10[/size] [size=small]2A/800V[/size] [size=small]1N5062[/size] [size=small]DIODE[/size]
[size=small]D11[/size] [size=small]2A/800V[/size] [size=small]1N5062[/size] [size=small]DIODE[/size]
[size=small]C1[/size] [size=small]2200U/25V[/size] [size=small]Fine Gold[/size] [size=small]CAPACITOR[/size]
[size=small]C2[/size] [size=small]2200U/25V[/size] [size=small]Fine Gold[/size] [size=small]CAPACITOR[/size]
[size=small]C3[/size] [size=small]2200U/25V[/size] [size=small]Fine Gold[/size] [size=small]CAPACITOR[/size]
[size=small]C4[/size] [size=small]2200U/25V[/size] [size=small]Fine Gold[/size] [size=small]CAPACITOR[/size]
 
May 6, 2012 at 4:21 AM Post #1,885 of 2,680

robeeert1

100+ Head-Fier
Joined
Dec 29, 2008
Posts
396
Likes
14
        Mhdt Havana  BOM                
ID    Value    Spec /Grade    Parts             
R1    301R    0.6W, 1%     RESISTER            
R2    100R    0.6W, 1%     RESISTER            
R3    1K04    0.6W, 1%     RESISTER            
R4    1K04    0.6W, 1%     RESISTER            
R5    121R    2W, 1%    RESISTER            
R6    1K0    0.6W, 1%     RESISTER            
R7    1K0    0.6W, 1%     RESISTER            
R8    243R    0.6W, 1%     RESISTER            
R9    75R    0.6W, 1%     RESISTER            
R10    270R    1W, 1%    RESISTER            
R11    5K62    0.6W, 1%     RESISTER            
R12    1K0    0.6W, 1%     RESISTER            
R13    270R    1W, 1%    RESISTER            
R14    5K62    0.6W, 1%     RESISTER            
R15    1K0    0.6W, 1%     RESISTER            
R16    39R2    2W, 1%     RESISTER            
R17    2k26    0.6W, 1%     RESISTER            
R18    1K0    0.6W, 1%     RESISTER            
R19    475K    0.6W, 1%     RESISTER            
R20    475K    0.6W, 1%     RESISTER            
R21    475K    0.6W, 1%     RESISTER            
R22    1K0    0.6W, 1%     RESISTER            
R23    100R    0.6W, 1%     RESISTER            
R24    402R    0.6W, 1%     RESISTER            
R25    33R2    0.6W, 1%     RESISTER            
R26    33R2    0.6W, 1%     RESISTER            
R27    100R    1W, 1%     RESISTER            
R28    100R    1W, 1%     RESISTER            
R29    20K0    1W, 1%     RESISTER            
R30    20K0    1W, 1%     RESISTER            
R31    390K    1W, 1%     RESISTER            
R32    390K    1W, 1%     RESISTER            
R33    100R    1W, 1%     RESISTER            
R34    100R    1W, 1%     RESISTER            
RL    1K53    0.6W, 1%    RESISTER            
H1    BRED        BRED            
H2    BRED        BRED            
D1    2A/800V    1N5062    DIODE            
D2    2A/800V    1N5062    DIODE            
D3    2A/800V    1N5062    DIODE            
D4    2A/800V    1N5062    DIODE            
D5     Led Blue    3mm    Led            
D6     Led Green     3mm    Led            
D7    Led Red    3mm    Led            
DU    Led Yellow    3mm    Led            
D8    2A/800V    1N5062    DIODE            
D9    2A/800V    1N5062    DIODE            
D10    2A/800V    1N5062    DIODE            
D11    2A/800V    1N5062    DIODE            
C1    2200U/25V    Fine Gold    CAPACITOR            
C2    2200U/25V    Fine Gold    CAPACITOR            
C3    2200U/25V    Fine Gold    CAPACITOR            
C4    2200U/25V    Fine Gold    CAPACITOR            
C5    0.1U    FILM & FOIL    CAPACITOR            
C6    47U/25V    MUSE KZ    CAPACITOR            
C7    100U/25V    MUSE KZ    CAPACITOR            
C8    47U/25V    MUSE KZ    CAPACITOR            
C9    100U/25V    MUSE KZ    CAPACITOR            
C10    0.1U    FILM & FOIL    CAPACITOR            
C11    0.22U    FILM & FOIL    CAPACITOR            
C12    1000P    Silver Mica    CAPACITOR            
C13    0.01U    FILM & FOIL    CAPACITOR            
C14    0.01U    FILM & FOIL    CAPACITOR            
C15    470U/10V    OSCON    CAPACITOR            
C16    100U/50V    Fine Gold    CAPACITOR            
C17    0.1U    ECQ-P    CAPACITOR            
C17    100U/50V    Fine Gold    CAPACITOR            
C18    100U/50V    MUSE KZ    CAPACITOR            
C19    47U/25V    MUSE KZ    CAPACITOR            
C20    100U/25V    MUSE KZ    CAPACITOR            
C21    0.1U    FILM & FOIL    CAPACITOR            
C22    100U/50V    MUSE KZ    CAPACITOR            
C23    100U/25V    MUSE KZ    CAPACITOR            
C24    47U/25V    MUSE KZ    CAPACITOR            
C25    0.1U    FILM & FOIL    CAPACITOR            
C26    100U/25V    MUSE KZ    CAPACITOR            
C27    47U/25V    MUSE KZ    CAPACITOR            
C28    100U/25V    MUSE KZ    CAPACITOR            
C29    0.1U    FILM & FOIL    CAPACITOR            
C30    0.1U    FILM & FOIL    CAPACITOR            
C31    0.1U    ECQ-P    CAPACITOR            
C32    47U/25V    MUSE KZ    CAPACITOR            
C33    47U/25V    MUSE KZ    CAPACITOR            
C33    2.0U    FILM & FOIL    CAPACITOR            
C34    33U/16V    OSCON    CAPACITOR            
C35    2.0U    FILM & FOIL    CAPACITOR            
C37    1000U/16V    Fine Gold    CAPACITOR            
C38    47U/25V    MUSE KZ    CAPACITOR            
C39    470U/25V    Fine Gold    CAPACITOR            
C40    332P    Y2    CAPACITOR            
U1    LT317A    LT317A    IC            
U2    NJM431LA    NJM431LA    IC            
U3    NJM431LA    NJM431LA    IC            
U4    NJM431LA    NJM431LA    IC            
U5    CS8414    CS8414    IC            
U6    74ACT86    74ACT86    IC            
U9    NJM431LA    NJM431LA    IC            
U10    2N2222    2N2222    IC            
U11    2N2222    2N2222    IC            
U12    DLR1151    DLR1151    OPTIC RECIEVER            
U13    LT1085CT    LT1085CT    IC            
U14    Nais TX-2     4.5V    RELAY            
S1    Main Switch    OEM    Toggle SWITCH            
S3    90D PCB USB     OEM    Type B  USB Jack            
S4    90D PCB      OEM    RCA JACK              
S5    90D PCB      OEM    RCA JACK              
S6    90D PCB      OEM    RCA JACK              
S7    Toggle SWITCH    OEM    Toggle SWITCH            
S7    4P Molex    OEM    AC Input             
S8    3P Molex    OEM    9-0-9V AC Input            
S9    3P Molex    OEM    15-0-15V AC Input            
    9PIN CERAMIC GOLD        TUBE SOCKET            
UR1    33R2    0.6W, 1%     RESISTER            
UR2    1K50    0.6W, 1%     RESISTER            
UR3    33R2    0.6W, 1%     RESISTER            
UR4    1M    0.6W, 1%     RESISTER            
UR5    301R    0.6W, 1%     RESISTER            
UU1    0.1U    FILM & FOIL    CAPACITOR            
UU1    CM102    CM102S+    IC            
UU2    Nais TX-2     4.5V    RELAY            
UU3    12Mhz    10ppm    Crystal            
UH1    BRED        BRED            
UH2    BRED        BRED            
UC1    47U/25V    MUSE KZ    CAPACITOR            
UC2    150V/16V    OSCON    CAPACITOR            
UC3    22p    NPO    CAPACITOR            
UC4    22p    NPO    CAPACITOR            
UC5    22p    NPO    CAPACITOR            
UC6    22p    NPO    CAPACITOR            
    FUSE    500mA 5x20mm Slow    FUSE            
UGB    BRED                    

 
 
May 6, 2012 at 11:44 PM Post #1,886 of 2,680

Pingfloid

100+ Head-Fier
Joined
Oct 11, 2011
Posts
201
Likes
15
Thank You for the BOM!
 
Do you know where can I find a reliable source of K-Grade PCM56's?
 
There is one seller on Ebay, and the K letter on the left corner is so obviously hand-painted!  
confused.gif

 
May 7, 2012 at 6:38 AM Post #1,888 of 2,680

Pingfloid

100+ Head-Fier
Joined
Oct 11, 2011
Posts
201
Likes
15
Quote:

Thank you GP77.
 
My chips are already labeled as PCM56PK (K letter at the end). The same at the Mouser Reference (PCM56P-K), but mine have a J at the right side of the chip (apparently indicating that they are J grade). The only difference is the dash before the K.
 
My chips look like this one. I am wondering what is the meaning of the K at PM56PK and the J on the right.

 
The data sheet does not mention the existance of a separated letter on the right, neither a PCM56PK without dash. That is confusing
 

 
May 7, 2012 at 11:26 AM Post #1,889 of 2,680

robeeert1

100+ Head-Fier
Joined
Dec 29, 2008
Posts
396
Likes
14
Quote:
Thank you GP77.
 
My chips are already labeled as PCM56PK (K letter at the end). The same at the Mouser Reference (PCM56P-K), but mine have a J at the right side of the chip (apparently indicating that they are J grade). The only difference is the dash before the K.
 
My chips look like this one. I am wondering what is the meaning of the K at PM56PK and the J on the right.

 
The data sheet does not mention the existance of a separated letter on the right, neither a PCM56PK without dash. That is confusing
 

 
I'm almost sure this one on the photo above is a fake, BB never produced chips marked "PCM56PK-J" inscription,
I bought the same from ebay seller some time ago, sounds different than PCM56P-L.
But this is not the first class sound like present real Japanese or Korean "K" chips.
On the photo below 100% originals.
 
May 7, 2012 at 2:29 PM Post #1,890 of 2,680

loserica

100+ Head-Fier
Joined
Apr 14, 2009
Posts
459
Likes
22
Quote:
Loserica, it looks nice, I'll try to decouple the chips better.

 
Robert,

After about a week of burning of Oscon's caps, the sound changes slowly to what we expect: ambient noise and micro details can make the difference!!! 
Is incredible how much improved the sound in terms of consistency... (until this time, after implementation of capacitors the sound was slightly inhibited, and only now I feel really the burning...) Listening spectrum has been greatly enriched, they do present new elements that not only I haven't heard before but even if they were, wouldn't be combined so harmoniously, so musical. This change greatly favors the layering and decay of the acoustic image: nice and smooth! If before I was outside of listening, now I feel I'm in the middle of instrumentation, I feel closely linked by the singer, audition send me more privacy! Now I decided to say without reservation: I love Havana!
smile.gif

 

Users who are viewing this thread

Top