My first MS fix

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Mr. Wild
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My first MS fix

Post by Mr. Wild »

It looks like my Phoenix Gold addiction has escalated. I'm on MS now.

I scored this beaut yesterday. Pure as the driven snow.
It has been sitting in a closet for over ten years just waiting for me, never been opened up before. :clap:

On the downside, one of the speaker terminal screws has a broken thread and theres lots of very sticky glue on the bottom panel. It had two huge strips of velcro tape which I removed.

There's one curiosity inside. In the last picture I have marked one big diode which sticks out from the rest.
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Odd one out diode
Odd one out diode
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M50, MS275, MPS2500, ZX450, ZPA0.3
ttocs
the Floor Sweeping Hack with Golden Ears
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Re: My first MS fix

Post by ttocs »

should have used some super high end caps to get the most out of it but it looks good.
what else can I say I am a grumpy asshole most of the time.
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Eric D
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Re: My first MS fix

Post by Eric D »

ttocs wrote:should have used some super high end caps to get the most out of it but it looks good.
So true!
Got "schooled" by member shawn k on May 10th, 2011...
No longer really "in tune" with the audio industry, and probably have not been for some time.
Hands down the forum's most ignorant member...
Don't even know what Ohm's law is...
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Mr. Wild
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Re: My first MS fix

Post by Mr. Wild »

Here we go again..

Im going to replace the power supply caps with some super high-end Pan a Sonic caps. Im sure the soundstage will double in width.

BTW did earlier evisions of ms275 have individual silpads and screws on the big devices from factory?
I also like the green / black BJTs more than the black / black. But I can live with it because it reduces the coloration of the signal.
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M50, MS275, MPS2500, ZX450, ZPA0.3
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valeks1
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Re: My first MS fix

Post by valeks1 »

You can replace diode with 1N5401 - 1N5404
ttocs
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Re: My first MS fix

Post by ttocs »

upgrading the diodes to audiophile quality made all the difference in the amp I did it too. Suddenly the blacks were blacker, colors were brighter and everything looked better....
what else can I say I am a grumpy asshole most of the time.
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oldskoolmseriesfan
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Re: My first MS fix

Post by oldskoolmseriesfan »

ttocs wrote:upgrading the diodes to audiophile quality made all the difference in the amp I did it too. Suddenly the blacks were blacker, colors were brighter and everything looked better....
Could you hear the music in technicolor :jocolor:
Phorum PI!
Square woofers are GAY!!
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Mr. Wild
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Re: My first MS fix

Post by Mr. Wild »

Lay off the bongs for a while and settle down :D

Thanks valeks! but Im not replacing a diode PG saw fit to go in one of their amps. I assure you this amp has not been touched. I checked the bottom cover for fingerprints on the inside..
I guess they just ran out of their regular shit and put in something close enough.
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M50, MS275, MPS2500, ZX450, ZPA0.3
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nico boom
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Re: My first MS fix

Post by nico boom »

Mr. Wild wrote:Here we go again..

Im going to replace the power supply caps with some super high-end Pan a Sonic caps. Im sure the soundstage will double in width.

BTW did earlier evisions of ms275 have individual silpads and screws on the big devices from factory?
I also like the green / black BJTs more than the black / black. But I can live with it because it reduces the coloration of the signal.
Yes, the early MS amps had the individual silpads and screws. For me they are much more attractive looking than the later 10th anniversary ones.
Looks mint on the inside for sure, nice piece! Over here the MS275 was always more appreciated than the MS2125; the smaller 275 just puts out a whole lot of clean power for it's size, and can do so 24/7.
Recap it with care and it will serve you for many years... 8)
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Mr. Wild
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Re: My first MS fix

Post by Mr. Wild »

I didn't know MS275 were made as a 10th anniversary edition, thanks!
The seller said he bought it new in circa 2000-2001 so i did wonder about that.

I'm recapping for sure! There's traces of electrolytic fluid under the PS caps.
Do you think I can reuse the original silpads?
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M50, MS275, MPS2500, ZX450, ZPA0.3
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joerg
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Re: My first MS fix

Post by joerg »

Mr. Wild wrote:I didn't know MS275 were made as a 10th anniversary edition, thanks!
The seller said he bought it new in circa 2000-2001 so i did wonder about that.

I'm recapping for sure! There's traces of electrolytic fluid under the PS caps.
Do you think I can reuse the original silpads?
They never brought a 10th anniversary MS275 onto the market. Only the latest revision boards (Rev.h and Rev.i) had the bussbar in it when talking about the MS275. The last ones where build in 1996.

And no, you can´t use the old silpads anymore. You´ll most likely find out why when u took the amp apart. :wink: (U don´t have any)
Music is silver, PHOENIX is GOLD
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Mr. Wild
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Re: My first MS fix

Post by Mr. Wild »

I'm a bit confused here. I don't see any bussbars in my MS275. It's a rev H.
Do you mean the bars that press the transistors against the heat sink.

So the original silpads break up when removed, is that what u mean?
I won't take the amp apart before I have everything ready that's needed for the cap replacement.
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M50, MS275, MPS2500, ZX450, ZPA0.3
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joerg
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Re: My first MS fix

Post by joerg »

Sorry! Meant to write clamp down bars.

You don´t have any silpads in the amp pictured above. This is just an insulation plate and cooling paste.
Last edited by joerg on Tue Jan 24, 2012 9:44 am, edited 1 time in total.
Music is silver, PHOENIX is GOLD
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nico boom
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Re: My first MS fix

Post by nico boom »

You are right Joerg; about the silapds/ cooling plate and the 10th ann. series. [never made 275's as 10th ann.]
I recall beeing dissappointed after opening up one of the latest MS275's to find out that PG used the clamp-bars in there as well...I just like the early series more. :wink:
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