Harmon Kardon CDP mods please - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 29th June 2007, 08:38 AM   #1
diyAudio Member
ozziozzi's Avatar
Join Date: Jan 2006
Location: Brisbane NW region
Question Harmon Kardon CDP mods please

Can anyone point me towards a thread or website that details mods/tweaks/improvements for Harmon Kardon CD players, especially the HD 7300 that I have just acquired. I searched forum in vain.

  Reply With Quote
Old 30th June 2007, 10:32 PM   #2
diyAudio Member
Join Date: Jan 2007
Location: europe
-filtering "self"
-bigger power caps bypassed by film caps
-faster diodes
-better resistors
-better op amps...

Works for any digital source.
  Reply With Quote
Old 2nd July 2007, 12:08 AM   #3
diyAudio Member
ozziozzi's Avatar
Join Date: Jan 2006
Location: Brisbane NW region
Merci, deuginthesky, I will inquire locally about "better" quality components. I have heard that replacing switch-mode power supply with a well-regulated and filtered linear power supply is a good start--someone even suggested **battery** supplies for different parts of a CD player or increased decoupling of powersupplies on the boards themselves to prevent interaction between digital and analogue parts of circuit. I am trying to find a service manual or at least a circuit diagram for the HD7300.

Thanks again for your suggestions

Of course I need all those speakers in the garage.
  Reply With Quote
Old 7th July 2007, 07:48 PM   #4
diyAudio Member
Join Date: Jan 2007
Location: europe
For example, what I did on a Pioneer CD-player:

10 000UF 50V main capacitor filtered by a 2,4UF MKP cap.
82 00UF Panasonic FC "secondary" capacitor
1% standard metal resistors between dac and outputs
ceramic bypass/coupling caps replaced by styroflex/mil grade PIO.
Elna Silmics II before outputs
MKP hi quality caps (Clarity Cap SA range) soldered on PCB/RCAs outputs
I/V OP amp is now LT1057
analog amp is now OPA2604
MKP bypass caps

Not that expensive when you buy lots of components

With good speakers, you hear the difference.
  Reply With Quote


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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Harmon Kardon Galaxy BA-150 gfhaban Tubes / Valves 3 2nd May 2016 02:31 AM
Harmon Kardon argonrepublic Solid State 2 23rd June 2009 07:30 AM
harmon kardon T-40 jaudio Analogue Source 0 24th October 2007 11:37 AM
Harmon Kardon T40 jaudio Analogue Source 0 7th May 2005 12:04 PM
FS: Harmon Kardon HK2500 bhg41088 Swap Meet 2 29th May 2004 06:03 PM

New To Site? Need Help?

All times are GMT. The time now is 03:38 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2