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MHDT Havana DAC - Page 131

post #1951 of 2474

Congratulations grandpa Niamex J

 

11.jpg

 

 

If you do not remove R25/R26, I think that you are still receiving the OpAmp output signal from pins 9 and 10, unless you cut the PCB track or bend the pins 9 and 10 of the IC.

 

350x303px-LL-b44d0400_schematic_hav.jpeg

post #1952 of 2474
Quote:
Originally Posted by rocky500 View Post

Thanks everyone for a great thread.

Got some more parts today. Installed the MCaps, Clarity and changed c6 fron 47uf to 100uf for added bass.

I did this with the more afordable caps and so far with only half an hour listening I'm impressed. Hopefully will only get better.

I think I'm finished for now though.

Pic under hood.

IMG_6611b.jpg

 

I also got a MCap for the 0.22uf and might try that after a while instead of the clarity cap.(It is quite large though) But right now it is sounding great.


That clarity cap 0.22uF x 630v yes? Can any body please just confirm that for me.

post #1953 of 2474
Quote:
Originally Posted by redcat2 View Post


That clarity cap 0.22uF x 630v yes? Can any body please just confirm that for me.

 


220nF = 0,22uF

post #1954 of 2474

I did an order with Hifi Collective as follows. I aready did some other mods before as well.

 
1 x (SUP8-030) - 0.22uF 1200V M Cap Supreme polypropylene Caps £6.77
1 x (CCESA-030)- 0.22uF 630Vdc Claritycap ESA Range polypropylene £4.40
2 x (SUP8-120) - 2.2uF 600V M Cap Supreme polypropylene Caps £24.86
1 x NFG-790 - 100uF 25V FG Nichicon type, UFG1E101MPM £0.50
1 x NKZ-110 - 100uF 25V Nichicon KZ type, UKZ1E101MPM £0.33

 

I had intentions of trying both the ClarityCap and MCap. Installed the clarityCap first and liked what I heard so kept tht one in.

The 2 100uF caps I ordered were to get a matching one for the bass enhancement change. Not sure which one I actually used but it was the same brand/type as the 47uF it replaced.

 

I never noticed too much of the changes I did, as they were all over a time period and my audio memory is not very good. Also I was changing between many brands of speakers at the time.

I ended up selling my modded Havana to someone in another forum who already owned a stock Havana. Here was his coments back to me, once he recieved it.

 

"DAC is here safe and sound. 5 minutes of auditioning. WOW !!!. no small difference. I'll give you a more decent report when I work out how it is so different. First impression is that my much loved Havana sounds like its's playing through a wet sock compared to the Dolly Parton mods."

"The biggest difference between the two is  increased resolution across the frequency spectrum- whether that is because of a reduction of noise floor or whatever.

The sound stage is wider. I'll take my time to work out as well as I can what else is going on."


Edited by rocky500 - 7/3/12 at 10:41pm
post #1955 of 2474

Thanks for that, i have been putting together a parts list now for around four months the hardest things to track down where the HT Jupiter caps round 2.2uf 600v but i have now done that after going around the world.

post #1956 of 2474

I posted a photo of the original BB PCM56-K chips on the page 115 this thread... This photo was taken by me!

Now someone is using it selling pcm56p-K chips on ebay. Beware I think these are another fakes from China....

 

 

this is my picture:

 

 

http://www.ebay.com/itm/1PCS-IC-BB-TI-DIP-16-PCM56P-K-PCM56PK-Made-in-KOREA-/251096155743?pt=LH_DefaultDomain_0&hash=item3a767f465f

 

http://www.ebay.com/itm/1PCS-IC-BB-TI-DIP-16-PCM56P-K-PCM56PK-Made-in-JAPAN-/251096154815?pt=LH_DefaultDomain_0&hash=item3a767f42bf


Edited by robeeert1 - 9/9/12 at 1:00pm
post #1957 of 2474

It seem extremely cheap, ... can't be sure what is true and what fakes in electronic trading on e-bay. Original is imitated almost perfect!

post #1958 of 2474

I think you should report it to ebay.

post #1959 of 2474
Quote:
Originally Posted by rosgr63 View Post

I think you should report it to ebay.


Will do it later.

post #1960 of 2474

Thanks, this way you are protecting all of us.

post #1961 of 2474

reported
 

post #1962 of 2474

Thanks.

How can one tell if a chip is genuine or fake?

post #1963 of 2474
Quote:
Originally Posted by rosgr63 View Post

Thanks.

How can one tell if a chip is genuine or fake?

 

Genuine BB ones sound different.

Maybe they are selling genuine chips - who knows, but why do they use my private photo?

I bet these ones they are selling have different print or don't have print at all. :)


Edited by robeeert1 - 7/11/12 at 1:43pm
post #1964 of 2474

They can only use your photos with your permission, they are your property.

post #1965 of 2474

for those who are looking for genuine Japan "K" grade chips for their Havana. 4 pcs in every CD player.

 

20 pcs of PCM56P-K for sale...

 

picture of the main control board of these babies:


Edited by robeeert1 - 9/9/12 at 1:01pm
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