Toroidal transformer for Marantz CD-6000OSE. Is it possible?

[safe1]

Hi guys,

i have a CD-6000OSE (recently got rid of the CD-R ERROR problem thanks to this forum).

There is something more that i wanted for years to do to my 6000OSE player but i couldn't find a DIY information anywhere.

I want to replace its transformer with a toroidal one.

I know that 6000 KIS version has toroidal transformer (this was one of the upgrades of the KIS over the OSE version).

Would this be possible to be done to my 6000OSE and, if so, could someone help me with some information about how to do it?

e.g.: which toroidal transformer to use, and how to connect it into the cd-player after removing the old one?

Any help appreciated !!!


Thank you in advance,
Sotiris.

[poynton]

Unless you get hold of a KI toroid, you will have to use multiple transformers or have one specially wound.

A better upgrade route would be to improve the clock, output, regulatore etc..


Andy

[safe1]

hi poynton and thanks for your response...

I have a very specific problem with my CD6000OSE that makes me want to replace its transformer.

The problem is that the cd-player causes hum and EMI to my Rega P3 turntable that is situated one shelf above it.

I investigated the problem and found out that it's cause is the cd-player and 90% sure that is its the poor shielding of its transformer.

It only happens if i power-on the CD6000OSE. If (while it is powered-on) i take away the cd-player from its rack-shelf and keep it at about 30-40cm away from the turntable the hum goes away.

That drived me to believe that CD6000OSE transformer is of a very poor design in that respect...

If i find a KI's toroidal transformem would it be easy to swap it with the 6000OSE's current transformer?
(wire connections etc.)

Thanks in advance.

[Miniwatt]

Why would it be the transformer? There's a lot of stuff going on in a cd-player..
You could try shielding the xformer and find out. Maybe the cd player case isn't grounded properly?

[safe1]

Miniwatt,

what material would you suggest for shielding the transformer?

Also, how can i check if the cd player case isn't grounded properly?


P.S.

FYI, the power cord plug of my cd-player has only poles, there is no 3rd pole for ground.

But as far as i know the player is grounded through the amplifiers ground via the interconnects (am i right?). The amplifier IS grounded to the wall AC socket.

Thanks in advance for your help.

[G40]

Originally Posted by safe1

i have a CD-6000OSE (recently got rid of the CD-R ERROR problem thanks to this forum).

Sotiris.

S.

Try this (or similar) if you do not want to make internal changes ...

I am interested in your CD/R/RW problem - what was the fix (or the thread with the fix?)

Thx++

Jerry

[amc184]

I know of a site that supplies custom wound R-core transformers at a reasonable price. I bought a standard wound model from them and was very happy with it.

R-core are a nice combination of the low radiated field and compact size of a toroid with the low interwinding capacitance of an EI core.

[jcx]

any low carbon steel sheet without big holes is a good magnetic conductor

"short out" the source (xfmr) with a iron box (but allow for heat dissipation) - I've found poor xfmr lead and rectifier cap wiring can be a problem too - you may be able to add twists

air-space for cheap "magnetic insulation" and then if necessary box up the susceptible circuit similarly in cheap iron

after the above specialized mu-metal can help but is way too expensive and subject to saturation to be the 1st line of defense