opa 627bp in MHZS cd33

Hi,

I have a question of my upgrade it for replacing of outup caps from SCR 0.22uf/630v to Jensen al oil cap 0.22uf/630v.
opa 2604 changed to opa 627bp. Result is very good.
But i found that the working voltage of IC is 28.9v so the 627bp is 18v  so it is quite hot. It played around 0ne hour, no problem was found just quit hot.

I also check the IC data of 627bp working max voltage is 18v.
Is it ok for that cd????????????????????????

be save now I change IC from opa2604 to opa2132 much impovement, it save, no heat found, because the max voltage of opa2132 is 35v.
opa2604 max voltage is 25v.

So suggest  member who have MHZS cd33 or cd66 to change the IC must becare.

Thank you for sharing.

thank you so much,
i have changed tube to GE5670w old stock (new) ,changed digtal outup from RCA to BNC style and also chenged solen cap to ERO MKP 1852 0.22uf/1000v blue colour.
finally changed outup wire.
the result is great.
Thank you for sharing.

Hi superwhite,

I have no expreience on tube 369A, but some  reports said  that is the best tube . But this is around HK$350 each.
GE5670 just $110 both. Thia is very good lor!!!!!!!!!
Can you give the feeling of  listen for 386a to me.

Thank you

hi superwhite,

The ERO cap is Germany company the quality same to EOR cap and wimma. It is better than wimma for high notes. (clear and smooth) I make this in power filter of MHZS  CD33 only. Sound outup changed Jensen alum Paper oil 0.22uf/630 these cheaper than copper much. then the mid bass is better. (I feel)
I also replaced the 4 rubycon caps before Elna to Nichcion (Muse) 4,700uf/25v Real product not china product (Green with bule cloue words.) buy it in 凱韻 (油麻地) HK$25 each.

Thanks

I have upgrade my mhzs cd33 as follow photos.

Hi,

how to post the photos

thanks.

hi,

my upgraded Mhzs cd 33's photos as follow for sharing.
The sound great than CD66 much.

One more photo.

Hi, Superwhite,

IC is opa627am the white cap value is 0.1uf/630v UCC cap (Taiwan). ths sound better than wimma box just $9.00 each in this web site.
the function  is filter caps for OPA627am. Can maked the sound body shap.

Thanks.

Hi superwhite,

The cap at the back is Jensen cap of 100uf/150v.

Thanks.

Hi, superwhite;

If changed to black gate, the sound will be HI FI sound than Jensen.
Jensen cap can provide muscial sound.

up to you to use.

thanks.

Hi windwss,

the original ecap is 100uf/100v. So use ecap >or =100v is ok.


Thanks.

Hi superwhite,

It doesn't matter.
I will wait for hearing from you.
A much different when dio it.


Thanks.

Good morning, Superwhite,


You can buy the jensen cap from William.

Hi superwhite,

This cap is supply power for tubes, so very import for sound quality.

When i changed it from M-cap, the sound become detail, smooth and powerful and very balance, win too much.  M-cap's sound just clear only. I also found that have  broken at the bottom of M-caps and other solen caps also. Because they to close  the pcb broad, it were burn by the solder with  the worker.

So i remind all MHZS's cdp owner of this.

Thank you fro sharing.

Hi winwss,

The two caps in front of the tubes as a filter of opa 2604's outup, so affect of the sound two much.

both are important, if change boths, that the sound will be closed to prefect.

Have you upgraded you cdp also?

thank you for sharing.

Hi superwhite,

I have some suggection to you CDP33 in as follow:

Try to replace 4  Rubycon ecaps which are beside of 4 Elna slim ecaps,
because these ecap are not suitable for audio.
I suggect to use elna audio grade ecap same value (costs HK$100.00), The bass will be solid and stronge than original very much (lower costs high gain). and try to replace the clock to 1ppm (costs HK$100.00)). It will be great.

Thank you for sharing.

hi superwhite,

Is it really cap solder shorting?????
Is it fine, when you re-solder the m-cap? if just this problem, i think you solder the m-cap not good before.

0.22uf/1000v not better than 0.22uf/630v. becuase the voltage just 220v. I said in hk. I don't know what voltage of your country.

Thanks for sharing.

Hi superwhite,

Long time no hearing from you,
what are you doing on you cdp ??????

I have upgraded my MHZS cd33 in finial stage as follow:
1. replaced the power filter caps to Jensen 0.22uf/6320v (alu tube).
2. replaced the outup caps to Jensen 0.22/630v pure copper foil.
The reslut is very great.  all range are impoved much.
enclosed the it's photo for your sharing.

Photo:

photo 2.

photo 1

photo 3

photo 4.

Hi  WINDWSS,

Total cost for jensen cap around $700 because has discount in hong kong shop.
I used MF A400A class A amp.  and Mission bookself speaker (add DC current on cross caps.).
Total costs of upgrade around HK$1000 but the sound is better HK$10,000.00's cdp.

Diy not base on money. just fun. That is the interestof Diy.
do you agreed.

Thanks.

sorry, that is Muscial Fidelity A500A class amp.

the cost for jensen is $900 (HK)

hi, superwhite,
sorry i am late to reply you, because out for dinner.

50v replace 25v is ok it will be better than 25v.
advantage can accept votage up to 50V and lower lost on singal.
disadvantage is the sound speed will be lower.
audionote caps is same as jensen cap, because jensen is oem for audionote.
but the price is lower than audionote.

You said replace siliver cableand inter connect, I think in you cpd will to fast, the sound will be to clear. This is my mind. copper is better.

Thank you for sharing.

hi superwhite,

In my point, if you change copper oil the speed will slow a little, but very match you cdp 33 Map cap outup supreme siliver oil (speed and clear)
copper oil will add a warm and more bass. It must be run 300 hours.

Thank you for sharing.

Hi WINDWSS,

If your solder skill is not good, I suggest you learn more on it first,
because the PCB broad and the material are easy broken or shorting with other.

thank for sharing.

Hi, superwhite,

I hope to see you modified cdp soon.

Thanks.

Hi superwhite,

I would like to let me know, which brand of cap you prefer ??

I am using Elna Ra3 and Nichicon Muse. these quit good for bass.

hi, superwhite,

Is it  panasonic cap FK or FC series. (audio grade) ? It is musical.
The costs of it is not expensive. go head

Thanks.

hi, superwhite,

FK's size is tall than FC is standard acuatlly as same.
Of cours, BG standard is better than panasonic cap FX and FC. but BG std also very expensive.

If you diy shop provide the  Pureism and X-Pro series Capacitor is made by Panasonic Electronic specially for Audio, that the sound quality same sd BG std, it is cheap than BG std.
up to you.

reference web site :
http://eshop.diyclub.biz/product_info.php?products_id=265

Hi, superwhite.
ref web sit http://www.panasonic.com/industrial/components/pdf/ABA0000CE22.pdf

Thanks.

hi superwhite,

Have you drop the cap today.

I enclosed the photo of panasonic cap FC for your reference.


Thanks.

hi, ceci,

Opa 627 am is the best. don't waste the money to change other opa.

I also have Opa 627ap, 627bp, 627am, Opa 134, AD797AH, 5534 Philip
,5534 bis S.

AD797 natural sound.
OPA627AM Hi Fi sound.
5534 bis S not clear.



Thank you for sharing.

Hi superwhite,

How feeling of tube Western Electric W396A ???
Is it are using in you cd33 ???
have you used RCA 5670 before and the felling ????
because in other web site is on sale around HK$120.00 pair.


Thanks you very much.

Hi superwhite,

Thank you yor advise.
I will try it later.


Thanks.

Hi superwhite,

The Jensen authorized dealer in Hong Kong as follow web site:
http://www.soundexplorer.com/home/home.htm
Or you can buy it in http://www.Hififever.com

The other web sit for roe caps as follows in Taiwan:
http://www.tubefan.com.tw/capacitor-2.htm
http://www.thlaudio.com/

Hope to help you.

Hi superwhit,

A other web site you can find the caps as follow:
http://www.partsconnexion.com/catalog/CapacitorsFilm.html


My friend have buy Mit Rtx cap , tubs base and wire from this web sit, the good quality is very great. and some goods are cheap than HK.

Hi superwhite,
first photo look for audio but  like not real goods. colour not clear.
second photo for computer use not for audio.
third  photo just for ditigal eg. IC DAC only.

THANKS.

hi superwhite,

RIFA PEH124 cap is very suitable. it si good cap.


Thank.

hi, superwhite,

Thank you for you information.

I have suprise toyou. I made a black colour picture paper on the CD. (Same size with CD) the sound from my speaker should be solid, clear, 3D.improved much.
costs = no costs.
You can try it or give comment.

Thanks you.

Hi Superwhite,

vishay or vishay BC Component for ecap are good (euro sound) warm and sweet.

Hi Windwss,

My Das is using a lot of RIFA PHE 428 caps, the high notes is clear (good).
I have no use Wima MKC4 before, so no comment on it.
But I used Wima MKP10 and Wima Black Box before. RIFA PHE 428 same of Wima MKP10.
Since Wima MKP10 is high grade than MKC4 so RIFA PHE 428 may be better than MKC4. I think.


Thanks for sharing.

Hi superwhite,

Please let me the result and photo of you upgrade.

I think you will like the sound much after replaced the ecaps.

Thank you.

Hi superwhite,

Over 0.5w is no problem, I also replace the resistors behind the tubs, to 1w.
If you want changed to 0.1% tolorence resistors sometime be good but price is high.
e.g Vishay box style (black colour) 0.1% tolorence resistors but very expensive = HK$170 each. (Very good).
Your present  resistors is very good la !!!!!!!
Is the KIWAME resistors are 1w??????

I suggest you don"t upgrade many times. because the IC will be esay shorted or locked. becare !!!!!!!!!!!!!!!!!!!!!!!
Your present cdp is very good la!!!!!!!!!!!!!!!!!!!!
If you changed opa to 627am that the sound have great improve.

Thanks.

Hi superwhite,

Normally resistor for cdp 1/2w is enough.
higher no problem.

Thanks.

Hi superwhite,

Any comment on RCA 5670 tube compare with GE5670, WE 396A or others.

Thanks

Hi superwhite,

because CD33 is tube cdp so I think use 1W is better. because CD33 is original 1W. in outup and power supply.  or ask the diy shop.

Now i have no mod my cd33 now, I enjoy its music. because its soun is suitable for me.

thanks.