Marantz CD63 & CD67 mods list - Page 802 - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 16th October 2007, 12:31 PM   #8011
SimontY is offline SimontY  United Kingdom
diyAudio Member
 
SimontY's Avatar
 
Join Date: May 2003
Location: Sheffield, North England
Send a message via MSN to SimontY
Default Re: External tranny and other things..

Quote:
Originally posted by geoffgjones1
Time for a report.....
Large external transformer for the opamps (225VA) is a success. Loads of bass, clean mid. I am going to try an 80VA, just to compare. The 225VA is a little heavy!
I could barely tell the difference between 15va and 80va in my preamp (both toroids). I bet you hear very little difference also.

Simon
  Reply With Quote
Old 16th October 2007, 12:36 PM   #8012
diyAudio Member
 
Fidelity Audio's Avatar
 
Join Date: Dec 2005
Location: Doncaster England
Default Re: External tranny and other things..

Quote:
Originally posted by geoffgjones1
Time for a report.....
Large external transformer for the opamps (225VA) is a success. Loads of bass, clean mid. I am going to try an 80VA, just to compare. The 225VA is a little heavy! This was to replace a small 6VA tranny. 12000uF Audio Elnas used, with ultra fast diodes, feeding schulz regs in the CD63KI.

Sound now compares well with my Linn LP12 for bass, probably even more detailed, although they do obviously sound "different". Now I will try a new PSU for the preamp in my PM17KI.

As for A class amps, I have always biassed my AB class stages more towards A class for the first few watts of output power with good effect, and much less heat! YOu have to be carefull though. I have to monitor temperatures carefully for the first few hours just in case i have taken things toooo far.

Cheers,

Geoff
Excellent , are those (12000uF) the blue caps used in the pm66KI amp?

I biased my well modded PM66KI more class A and i over did it the first time and the output popped while i was still adjusting it after a rebuild. I find adjusting it to the normal then tweaking up a little at a time works well (Well only if you monitor idle current from cold). Once its done the sound is much better.

I did have to upgrade my heatsinks with some custom ones as the standard 66KI sinks were not up to the job.

My 30VA inside the 63KI made a good improvement - even better than the 15VA I used before. Same gains you talk about. Worth the effort as it pushes the quality upwards

Brent
  Reply With Quote
Old 16th October 2007, 01:09 PM   #8013
diyAudio Member
 
Join Date: Dec 2005
Location: Wales
Hi Brent,

Yes they are the same! Nice caps. Swapped them out of my sisters PM66KI for a couple of 22,000 HQ pannies that I had lying around..... with little effect.

I did exactly the same thing with my sisters PM66, blew one channel. Managed to get a few transistor spares from marantz europe. More heatsinks added now!

I will be checking out the 80VA this weekend, and report back.

Cheers,

Geoff
  Reply With Quote
Old 16th October 2007, 01:51 PM   #8014
diyAudio Member
 
Fidelity Audio's Avatar
 
Join Date: Dec 2005
Location: Doncaster England
My (coke can) Silmics made a nice difference, more solid bass and smoother mids with no loss in the treble.

Here is a piccy of mine

It will be getting some 125W transistors soon as it is now 80W into 8 ohm and the PM66 transistors are rated at 100W max.

MY AMP

Brent
  Reply With Quote
Old 16th October 2007, 01:54 PM   #8015
SimontY is offline SimontY  United Kingdom
diyAudio Member
 
SimontY's Avatar
 
Join Date: May 2003
Location: Sheffield, North England
Send a message via MSN to SimontY
Quote:
Originally posted by rowemeister
Here is a piccy of mine
Rubbish, far too small.
  Reply With Quote
Old 16th October 2007, 01:55 PM   #8016
diyAudio Member
 
Fidelity Audio's Avatar
 
Join Date: Dec 2005
Location: Doncaster England
LOL

Well it just about manages to run my ATC speakers



Brent
  Reply With Quote
Old 16th October 2007, 01:56 PM   #8017
SimontY is offline SimontY  United Kingdom
diyAudio Member
 
SimontY's Avatar
 
Join Date: May 2003
Location: Sheffield, North England
Send a message via MSN to SimontY
Yes, all 400mW of it.
  Reply With Quote
Old 16th October 2007, 01:58 PM   #8018
diyAudio Member
 
Fidelity Audio's Avatar
 
Join Date: Dec 2005
Location: Doncaster England
hehe

Noob

Brent
  Reply With Quote
Old 16th October 2007, 09:09 PM   #8019
diyAudio Member
 
Join Date: Dec 2005
Location: Wales
What value are those cans? I really do not think that my sister would really appreciate them to that extent, but maybe I need to try some in my PM17?

Anyway, I am going to replace my lazer soon, it must have aged at least a bit by now. Where could I get a unit from? Would I be better off getting a new complete drive?

cheers,

Geoff
  Reply With Quote
Old 17th October 2007, 07:04 AM   #8020
diyAudio Member
 
Fidelity Audio's Avatar
 
Join Date: Dec 2005
Location: Doncaster England
Quote:
Originally posted by geoffgjones1
What value are those cans? I really do not think that my sister would really appreciate them to that extent, but maybe I need to try some in my PM17?

Anyway, I am going to replace my lazer soon, it must have aged at least a bit by now. Where could I get a unit from? Would I be better off getting a new complete drive?

cheers,

Geoff
The caps are 56V 22000uF. They were originally 200+ each. I managed to get them on the buyers section of this forum for 60 the pair not used. I think they are too big to fit in the PM17.

I would leave the laser if it is running ok, there are a lot of badly set up ones out there to buy, avoid Grandata for sure. I get all mine from CPC now, they come with the traverse and cost less than 20

Brent
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



New To Site? Need Help?

All times are GMT. The time now is 02:26 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2