Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Chip Amps Amplifiers based on integrated circuits

Copy of Kore-Eda pre ?
Copy of Kore-Eda pre ?
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 April 2006, 02:31 PM   #1
sinski is offline sinski
diyAudio Member
Join Date: Sep 2004
Question Copy of Kore-Eda pre ?

They are two new products from Sakura.


Maybe it will be easy to make a copy of the preamp ?

Can anybody identify the components in the preamp ?

Copy of Kore-Eda pre ?

As far as i can see they use:

1. Small transformer from Talema/India with 2x115V input and two 2.5VA 15V AC outputs

2. Two rectifiers composed from four normal diodes

3. Two bigger caps, probably 3300/25V Panasonic TS-HA?

4. 78xx and 79xx regs with two small electrolyt caps - decoupling caps ?

5. Preamp section with adXXX opamps ?

6. Small red tantalum caps close to opamps ?

7. Around opamps they are four resistors

8. One polystyren/aluminium input? output ? cap from BC ?

Can anybody identify more details and maybe create the schematic of this small pre ?

Who knows, maybe it sounds very good.

Cheers, sinski
  Reply With Quote
Old 3rd May 2006, 03:04 PM   #2
sinski is offline sinski
diyAudio Member
Join Date: Sep 2004
This is the link for preamp picture :


I am completely electronic newbie and have no to much knowledge about electronics. In the last days i was just reading about opamp based pres and looked carefully on Kore Eda pre.

I found the SWCAD software from LT and i created a circuit, which could be the pre, but i am not sure about it.


Can anybody help and say if it is OK ?

What about


C2,C3 4.7uF

Any ideas ?

  Reply With Quote
Old 4th May 2006, 12:03 PM   #3
jaudio is offline jaudio
diyAudio Member
Join Date: Oct 2004
You need to add a .1uf caps to the supply rails. I would also go over the datasheet,there are suggests for the resistors values. It may have a min. gain requirement also.
  Reply With Quote


Copy of Kore-Eda pre ?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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Quad 606 copy proba55555 Analogue Source 4 24th September 2007 11:58 PM
Cyrus PSX-R copy dubh Solid State 3 7th February 2007 04:59 PM
DAT Copy protection richardsymes Digital Source 16 30th July 2006 05:53 PM
Sure, copy an amp. . . It'd work but I'm looking for something different. PhoenixFL Tubes / Valves 6 13th May 2004 03:12 AM
Does anyone have a copy of WinAIRR 4? M_Anker Multi-Way 2 25th December 2001 05:57 PM

New To Site? Need Help?

All times are GMT. The time now is 01:45 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio