opa 627bp in MHZS cd33

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.

All is nice in Holland. Winter is setting in (10 degrees C).

I'll see what I can do about pictures. I have a electrical drawing for anyone that is interested.

My message is: get rid of opamps!

I've just made some pics. Enjoy.

Hi

Just saw your question. Here is the ebaylink: http://cgi.ebay.de/PAIR-CRYO-6N3P-DR-Hi-Fi-TUBE-VALVE-2C51-5670_W0QQitemZ280043801078QQihZ018QQcategoryZ39997QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

I'm very satisfied.

Have fun.

Look nice viewer. Sound is great i presume?

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 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 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 all,

Did anyone try the option of taking out the opamp yet?

Trust me, it's amazing.

Hi everyone,

Last week I did a comparison with a Arcam CD92. My sound was just as transparant and clear. His was a bit warmer. The differences were so small I was glad I paid a third of his price.

Yesterday a comparison with a modified Pioneer DP-S901. this one I clearly won. More clarity, better placement of the instruments, more high. I think because of the tubes.

A question to WindWWS:

You stated that eclipse pioneer tubes were the best for an acceptable price. Can you tell me where to  find them?

Hi Windwws

Do you know if there is a big difference between the Bendix 2C51 and the 6385 type?

H3d