opa 627bp in MHZS cd33

Hi viewer,

the price is about USD62, it all in, i like the small BG cap, it cute. will up date some PIC soon...... :wink:

Thanks for sharing.

Hi viewer,

after MOD opa627, i switch on the cdp, n put in the the 1st song, sound no change(same) , after that i change to 2nd CD(ROUND UP) wau!!!!! something different, the riding horse part from left to right is was so CLEAR! (but it still NOT up to my expectation, so i let the player run for 3 hour. n play the CHAI CHEN song, OH MY GOD, it totally different,  the vocal n instrument was so real! . viewer you are right! it really REAL now(last time is CLEAR). will let it run for long to see any improvement n share again. thanks viewer!           

i still prefer the WE396A even i have use WINDWSS's BENDIX tube, it actually slightly better than WE, but i want VOCAL, for vocal BENDIX cant get close to WE, bcoz the vocal is outside of the speaker if using WE.
my 2cent, thanks for WINDWSS for the tube. :wink:

Hi superwhite,

I also replace it to Jensen 10uf/150v, sound is very good.
I think if replace to 220uf is no problem, it will be more prowful, but a litte bit affect in high notes.
I suggect to follow same value of 100uf.

I would like to know what the result the cdps meeting today.
how much of the 627au with pcb and black gate ????

Thanks for sharing.

Hi viewer & h3d,

want to ask you something, the Pic below, is using 100uf100V, but the board is writen 220uf63V :?  so which 1 need to follow? if i change to 220uf 63V, any sound changes?



Thanks :wink:

hi viewer,

yes! just put in the opa627 :wink: , wau!!!!!!! now i can know the location of each instrument... :shock: will let it run first, will update you again!

Thanks for sharing. :wink:

hi windwss,

it can be used in our cdp.

Thanks.

Hi Viewer,

According to the article in the hififever column, we can use a tung-sol 6X4 tube & IRF830 to make improvement, do u think this can be apply in our player?

[quote:cf3e7a53dd="viewer"]Hi superwhite,

I try WE396a aldy from my fried. I feel it very warm sound (tube sound) a little bit slow. like a ox wine.

But ,I am like GW5679w Jan more . very clear and detail. Like red wine.
may be later to change.


Thanks.[/quote]

I have the similar feel on WE396 like u, feel that it is lack of a bit ohmmm & excitement.... not that suit me :p  u r using GW5679w or GE5670w?

Hi viewer,,

     that why i call the WE396A, warm n sweet, if it match with silver component, like Mundorf Silver/Oil n black gate(fast cap), it will be fast too. it very depand on initial setup, once find the best tube, stick to the one, from there only Mod until suit to individual taste.

my 2cent,  :wink: stick to the tube that you feel comfortable

Thanks for sharing

Hi superwhite,

I try WE396a aldy from my fried. I feel it very warm sound (tube sound) a little bit slow. like a ox wine.

But ,I am like GW5679w Jan more . very clear and detail. Like red wine.
may be later to change.


Thanks.

Hi viewer,

Many many thanks for advice, will make sure collect only solder. :wink:

By the way, i tot you said want to find WE396A to try out? any news?

Hi superwhite,

I have one thing to remind you, when you install it in you dcp you must make sure that the direction of opa.


Thanks.

Hi superwhite,

good looking.

you will found that you cdp have 30% sound stage improvment, when you installed it.

Hope to hearing from you soon.

Thanks.

Hi.

Just get my OPA627, price abit high, but still o,k. :wink:
with 2 BG NX NI-Q 0.47 50V.



will install on this coming sat

Hi h3d,

thanks for the diagram, need more time to digest :wink:

want to try out the WE396A cryogenically treated tube , but the budget run out :cry: (damn expansive)

Hi WINDWSS,

sure, bring the tube n cd player this sat morning, we try out together, at the same time i will change all the AUDIOLAB 8000P(my friend Pamp) cap to Black Gate too, n also change the OPA627 for my cd player. will have more update pic soon......

Dear all,

I apologize on the unclear statement on tube comparison.

Actually i have 2 tungsol and 2 bendix tube all 4 tube is used tube not the new 1.
Both the tungsol tube is made on different date i guess as the logo/word written on the tube and the construction slightly different. The tungsol tube on the picture with golden word 2C51 sound slightly better than the other tungsol tube.

For Bendix, same case, both tube made in different year with different label. 1 is ~1950 another 1 is later. My comment yesterday is base on the newer bendix tube in picture (run in for 15minute only). But when i test the old bendix tube which have a red mark on the bottom lastnight i will say i love the bendix old tube very much. This old tube give music, it make people to enjoy the music and neglect to analyse its performance. I just love it's natural sounding, the pace is just right for me. Tungsol sometimes slightly harsh at high, sound lighter and not that musical compare to old bendix.

This sat i will bring it to superwhite to reconfirm the result, we will compare direct to WE396, even though i feel that the old bendix is better but the best way is to copmare on the spot. As i only listen once on WE396A last month when superwhite bring it here.

Tonight i will listen again to the newer bendix as last time i just listen to it for less than an hour, i shall run in it for more time to see whether it will behave like to old bendix afetr more run in time.....

Viewer & superwhite,
I had add a ERO KP1836 0.022uF parallel to my solen 1uF cap, result is encouraging.....

With the bendix tube and the littel mod i had made i'm temporary satisfy with result.....

Hi Superwhite

I haven't tried the WE 396A with the cryo treatment. That could be a very nice combination.

By the way I was suprised at the comparison of the Bendix, Sungsol and .. I would have thought the Bendix would win overall, but that was not the case.

Here is a drawing of the old and the new situation. Hopefully that will help.

Hi superwhite,

good news, i will waiting your good news on opa627 la!!!!!!!!!!!!!


thanks.

Hi viewer,

will get the OPA627 tomolo, n plug in to cdp on sat, hope got BIG BIG improvement, i really hope       

Hi windwss,

you can changed to SCR solen 2.2uf/400v or 2.2 uf/630v
costs around $50 each in hk.
SCR solen 70% = Mitil-cap ppfxs
because both material is tin foil.

SCR solen low costs high gain.

Thanks.

thank you viewer!!

Then i prefer Blackgate loh since i like powerful sound.....

By the way, my coupling cap for opamp is 2.2uF (Evox Rifa MMK) do u think i can use smaller uF like 0.22 or 0.33 to reduce cost?
My headache is most of my cap is using quite high uF compare to CD33 so the cost of modification is much higher... : (

hi windwss,

Blackgate N series non polarization ecap will it better than (SCR solen +0.1 wima black box)? since the cost is similar....

upto your taste.
scr solen + wima high notes and speed will better.
Blackgate will be powful.


I think use same value of original will be save.

Thanks.

Regarding the 3 tubes, i had roughly test only, my 1st impression is that 1 like both tung-sol & bendix compare to GE JAN 5670W.

Both have better transparency & better detail & faster than GE, it may not be as sweet/warm as GE but i like them.

if compare tung-sol & bendix, tungsol is lighter, faster more detail on mid to high whereas bendix more emphasis mid to low (the bass is tight & punchy).

Anyway my both bendix tube look difference- 1 is written as JAN-CEA-2C51 FOLIPSE-PIONEER or ECLIPSE-PIONEER (the word is blur) another is written as JAN-CEA-2C51 bendix. So i'm not sure it is teh same since supplier both from bendix.

hi viewer,

need ur advice, if i change the 100uF/50v Elna silmic e-cap near teh output to Blackgate N series non polarization ecap will it better than (SCR solen +0.1 wima black box)? since the cost is similar....


superwhite & viewer,

i'm a bit confuse when i check the voltage across teh 2 cap-100uf/100v rubycon ecap on power board (refer picture), voltage is <10V, if that's teh case i can use 100uF/50v blackgate ecap on this... i use the multimeter & place the probe on the 2 pin of the ecap, both cap give similar value.... as such i'm wondering whether i'm measure correctly?

Hi h3d,

did you try on the WE396A with cryogenically treated? look like sound good.

Hi WINDWSS,

Dont think got different on the Octave cap n solen cap, price almost same. :wink:  if can, then go for Mundorf loh...... :wink:

Hi h3d,

:shock:  :shock:  :shock:  :shock:  :shock:  :shock:  :shock:

no OPAMP! you are genius man!

Hi WINDWSS,

WAH, you got your new toy now, good, pls let us know the sound of each tube. :wink: .

for the h3d drawing..... eh.... i have pass back all my knowledge to my lecturer....hehehe..... : but will try my best to understand.

For the RELAY isu.... i dont think is a best way for CDP like us, because we all using TUBE , the POP sound is loud if we take out the relay, n we all know that the simplest the curcuit is still the best, bcause the more component in the CDP the more noise it can be created.   so.....
it just my 2cent :wink:

Got my new BG cap today, 100uf 160v BG NH series, good result, look like the vocal sound more loud.... :wink:  got to run in more...

hi all,

i check in internect say that by pass the muting transistor can give a more real sound anybody had try it? the best is replace the transistor with relay.

CD-player modification
Below are part of the article:

The first ......The best : costs $0.00
After the D/A converter you can find components for filtering, (to reduce ultrasonic garbage), buffering (to obtain low enough (typical 100-2k) output impedance) and muting. In almost any budget CD_player (below fl.1500 (~$900)) muting is performed with bipolar transistors. THIS REALLY SUCKS !!! More expensive players use relays for this job. Manufacturers apply muting to prevent "plopping sounds" while switching on/off. The audio circuit is temporarily short-circuited during on/off switching. When just playing music they do nothing at all! Nothing ?............., NO WAY, it alters the perceived sound. Why ? I remembered this explanation : a transistor has a small paricitic capacitance. The value is depending of the voltage from collector to emitter, i.e. your audio signal. The result : a signal dependent high-cut filter in your CD player. (ironic) Thank you so much : Marantz, Philips, Technics, Denon, Harman Kardon, Pioneer, Sony, Teac etc etc. Have they ever actually listened to their budget stuff ?! I can't imagine. Maybe they do apply muting transistors to give their more expansive one's a bigger lead and better sales. This would really suck !! (in my humble opinion)

I am not satisfied with this explanation : If you actually calculate the parasitic capacitance it is too small to hvae effect in the audio band. I hope to find a better more detalied explanation soon !

Check Audio en techniek for the source of this tweak.

The more expensive models use relays, so the manufactures are aware, but fail to pass the benefits to you.

I own a Marantz CD 52 MK2. After removing the muting transistors I noticed (warning : vague audiophile terms appear here) , a more fluently sound, less stress and more clarity, especially in female voices. Yes there are some plops to detect while switching on/off. This doesn't hurt my amp or speakers. (Unless : very high volume setting.). I am very pleased with this tweak. It is the best I ever encountered. It kept me from spending (too much) cash on audio en have left me more for music.

There has been some discusion on this bit in some newsgroups.

Goto : Deja News

and search with the keywords : muting transistors

or the keywords : CD Improvement Worked

click old

the : view thread is very usefull

Hi,

Finally i received my 2c5a tube today after waiting for > 1 months.

Attach the pic for u all, the build is so so will see the sound ok not....
from left: Bendix, united elctronic & tong-sol used tube.

Superwhite,

Eh! how the sound quality and charactheristic of octave brand film/foil cap compare to solen? thinking to go for cheap and nice 10uF tin foilcap...

SUPERWHITE,

Help me to study the diagram given by h3d since ur electronics background is bettre, i'm interested to try his way : )

i shall foillow ur advice to change to BG for the small ecap 1st.
Is the BG standard series & NH series price a lot difference?

[quote:2aa0e10216="viewer"]Hi superwhite,

It dosen't matter. I enjoy to sharing to diy friends.
I have not  idea william sir carry the RIKEN RMG resistor or not but you can ask him. 1/2w in HK cost around $10 to $15 each.

Hi windwss,

I have try parallel some caps in outup like you say.
they will made the foucs of sound not good.
I really recomment that If you used famous cap e.g Jensen, Mitil cap, Music cap, Ero, audiocap, rel-cap etc. no need to parallel other small caps. (wast money no gain).
If you used solen (lower speed caps) just parallel 0.1uf is very great.

You can try for diy fun. and let me the result.
Thanks.[/quote]

viewer,
u r right! i had test to use 3 cap parallel, elna 100uf, efd 01.uf & ERO KP1836, 0.22uF---> result not so good, high detail slightly more but too bright, sound stage slightlyblur/compress less open...

Hi Superwhite,

To be sure I'll say it again: I don't use any opamp in de cdp. Try it in an old CDP and check it out!

Hi Windwws and others

Indeed I bypassed the opamp. No need to cut it out all together.

:

I'm posting the drawing. It's the drawing of one chanel. A friend of mine will make a drawing showing the old and new electrical circuit.

Hi WINDWSS,

The best still Black Gate, no need to think about other ecap, bcoz you cant find any other audio grade cap over here.... . But it good that you no need to think alot, just think about Black Gate enough.....  :wink: , now just think about black gate........ , will get some BG cap tomolo to start MOD..... :wink:

Hi windwss,

For nichicon ecap, muse and kz is for audio.
Top is KZ second is muse.


Thanks.

thanks viewer,

For nichicon ecap, which series is consider audio grade? VX? PF??

hi windwss,

normally, e-cp has +- 20% of value so 2300uf replace is no problem.
don't replace a double value of original e-cap.


thanks.

Dear all,

Just to check if the original cap is 2200uF, can i replace with 2300uF? any bad consequences?

[quote:6ab75f107a="h3d"]About 8 months ago I took a change on buying a CD33 as well. Nobody overhere (Holland) knew the player, so that is always very exiting.

After some tuberolling (CBS5670, GE5670, some Russian 6n3P and WE396a) I got the player modified. The only part we modified was the endtrap. Actually everyting from the DAC onwards.

Of course we replaced some elko's and so on, but the most important change was taking out the OPAMP all together. Over here is a modifier that has very good results with taking out OPAMPs. You just replace it with a few resistances (not the right word I think) of 5 and 50 K. With this mod. the player sounded very open, wide, deep and balanced.

After this I also bought some Russian tubes that were Cryogenically treated. All together I'm very happy now.[/quote]

h3d,
U mean u will remove the opamp right? but your photo still have the opamp on it, do u bypass it or?

[quote:f3941c9ade="viewer"]hi superwhite,

all e-cap have extral 10% to 15% votlage. So it is no problem.
so the pcb broad is marked 10uf/50v.
Is it really 52.8v.


Thanks.[/quote]

Hi viewer,

yes, yesterday i find out using digital multimeter, but you can try it out, maybe you got different reading? :wink:  since the cap have 10% extra should be o.k lah, dont worry :wink:

hi superwhite,

all e-cap have extral 10% to 15% votlage. So it is no problem.
so the pcb broad is marked 10uf/50v.
Is it really 52.8v.


Thanks.

[quote:cbd5443327="viewer"]hi superwhite,

I think that is the opq2604 problem, because bass of 2604 is not clear.
when replace to opq627 will be ok !!!!!!!!!!!!!!!!!!!!!!!!


Thanks.[/quote]

Hi viewer,

Great!    hope can try opa627 soon, bcoz the bass now strong, but blur(cant know the bass location) have to call the diyshop for the stock arrived.....

I have check on the Voltage for the 10uf 100V cap that you ask me to change to BG N 10uf 50V, the reading on the multimeter is 52.8V, is this o.k for BG N cap?

Thanks.

hi superwhite,

I think that is the opq2604 problem, because bass of 2604 is not clear.
when replace to opq627 will be ok !!!!!!!!!!!!!!!!!!!!!!!!


Thanks.

Hi viewer,

Thanks, now my CDP improve on midrange n bass alot! now another problem coming, too booming from the speaker.....   but still acceptable. :wink:

hi superwhite,

very nice. sound must very good now.


thanks

Hi WINDWSS,

will call you once confirm, dont worry, will ask you to bring CDP also :wink:

Hi h3d,

Wah! vantage vitaminQ, good stuff , but why you make a bridge? what is your opamp no.?

Hi viewer,

wah! also nice!

here so update picture....




more to come next month...... :wink:

Thanks for sharing.

Hi h3d,
you say you have a electrical drawing, would you mind to post it for sharing.

Thank you so much.

Look nice viewer. Sound is great i presume?