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

Analogue Source Turntables, Tonearms, Cartridges, Phono Stages, Tuners, Tape Recorders, etc.

Which differences between Mark Levinson's "JC-1" and "JC-1DC"
Which differences between Mark Levinson's "JC-1" and "JC-1DC"
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 28th September 2013, 06:30 PM   #1
tiefbassuebertr is offline tiefbassuebertr  Germany
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
Default Which differences between Mark Levinson's "JC-1" and "JC-1DC"

Both versions are for operating without mains power supply - just two secondary D-cells are in use.
What is the difference ?

BTW - the mains supply version uses the additional term "AC"
The difference is the year of release - the suffix "DC" means a newer series (release 1976) than the older series without that suffix (release already 1974) go to
ハイファイ堂メールマガジン
Who know the difference between the gain stage circuits of this both versions ?

The schematic of the JC-1DC (potted version), which I have create some years ago, you will find here:
Mark Levinson JC-1DC_ckt[1].
Maybe there is also a schematic of the JC-1 anywhere. The last both pictures in post #12 are from a device in not worked condition at left channel - unfortunately also in a potted version. The replace of electrolytic capacitors by new ones don't provide the wanted success.

Last edited by tiefbassuebertr; 17th August 2018 at 09:52 AM.
  Reply With Quote
Old 28th September 2013, 06:36 PM   #2
tiefbassuebertr is offline tiefbassuebertr  Germany
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
pictures/images
Attached Images
File Type: jpg Mark Levinson JC-1 open-III.jpg (31.3 KB, 691 views)
File Type: jpg Mark Levinson JC-1.jpg (167.8 KB, 677 views)
File Type: jpg Mark Levinson JC-1-DC top open.jpg (160.1 KB, 665 views)
File Type: jpg Mark Levinson JC-1-DC top silver-II.jpg (488.7 KB, 656 views)
File Type: jpg Mark Levinson JC-1-DC top-black.jpg (93.4 KB, 636 views)
File Type: jpg Mark Levinson JC-1-DC top-silver.jpg (139.5 KB, 196 views)
File Type: jpg Mark Levinson JC-1-top.jpg (148.9 KB, 164 views)
  Reply With Quote
Old 28th September 2013, 08:53 PM   #3
QSerraTico_Tico is offline QSerraTico_Tico  Europe
diyAudio Member
 
QSerraTico_Tico's Avatar
 
Join Date: Oct 2004
Quote:
Originally Posted by tiefbassuebertr View Post
pictures/images
What's in the module is "secret"

Of the discrete version schematic circulates on the Net.
  Reply With Quote
Old 29th September 2013, 08:25 PM   #4
tiefbassuebertr is offline tiefbassuebertr  Germany
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
Quote:
Originally Posted by QSerraTico_Tico View Post
What's in the module is "secret"
not for me - I had create also from the potted module from "JC-1DC" the schematic and PCB-layout and upload anywhere here on diyaudio.
But this wasn't the question.
Both models JC-1 and JC-1DC uses both potted and not potted modules (i. e. with not accessible parts in one case and accessible parts - as most usual - in the other case).
Thus this can't be the difference.

Last edited by tiefbassuebertr; 29th September 2013 at 08:27 PM.
  Reply With Quote
Old 4th October 2013, 07:07 AM   #5
QSerraTico_Tico is offline QSerraTico_Tico  Europe
diyAudio Member
 
QSerraTico_Tico's Avatar
 
Join Date: Oct 2004
Why do you ask if you know the answer already?
  Reply With Quote
Old 5th October 2013, 08:07 AM   #6
tiefbassuebertr is offline tiefbassuebertr  Germany
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
Quote:
Originally Posted by QSerraTico_Tico View Post
Why do you ask if you know the answer already?
I don't know the answer.
What is to read in my first post?
Is my english so bad?
I know the module of the JC-1DC, but I don't know the module of the JC1. This means, that I also don't know the difference between both module models.

The JC-1DC module are also in use here:
Mc Kinnie RO III front | Flickr - Photo Sharing!
John Curl Mc Kinnie phono pre-preamplifier (post #3)
The sizes of this module are bigger than the sizes of the JC1 module (have a look to the first image of my first post).

by this version of the JC-1DC there is no module inside (maybe since series II):
JC-1DC Mark Levinson マークレビンソン 高価買取・販売 ハイファイ堂 中古オーディオ/ 中古レコード/中古CD/McIntosh/JBL/audio-technica/Jeff Rowland/Accuphase/真空管アンプ/トランス他オーディオなんでも買います 下取・通販・委託販売もやります 13-74607-88374-0
all components are easily accessible for replace.

some infos in the wrong thread (hard to find without navigation hints/post numbers):
http://www.diyaudio.com/forums/analo...t-ii-1934.html (post #19332 and #19334)
http://www.diyaudio.com/forums/analo...t-ii-4370.html (#43694)

My schematics of JC1-DC are to find on many websites over the world - e. g.
Mark Levinson JC-1DC

BTW - here a rebuild module based of the JC-2
Mark Levinson 1 - cbznob???? - Yahoo!???

Last edited by tiefbassuebertr; 5th October 2013 at 08:09 AM.
  Reply With Quote
Old 2nd March 2014, 12:35 PM   #7
tiefbassuebertr is offline tiefbassuebertr  Germany
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
any news?
  Reply With Quote
Old 27th September 2014, 10:55 AM   #8
tiefbassuebertr is offline tiefbassuebertr  Germany
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
For check I have in the moment the JC1 as to see in the first picture (post #1) but with serial number 1188.
I want to replace the electrolytics. 4 pieces are outside. How many electrolytics are inside of the module?
And in which direction is allocated the potted PCB? Is the solder site on top or at bottom?
The schematic of the JC1-DC module, which I have opened at those days, is attached as PDF-file here.
Unfortunately the JC1 module isn't the same.

Thank you for advices.
Attached Files
File Type: pdf C ...-A-Mark Levinson JC-1DC-Power Supply.ckt.pdf (44.4 KB, 156 views)
File Type: pdf C_Mark Levinson JC-1DCmod_ckt.pdf (18.2 KB, 181 views)

Last edited by tiefbassuebertr; 27th September 2014 at 10:58 AM.
  Reply With Quote
Old 28th September 2014, 11:42 AM   #9
h_a is offline h_a  Europe
diyAudio Member
 
h_a's Avatar
 
Join Date: Sep 2006
Location: Graz, Austria
Thanks for the schematics!
__________________
High Octane phono preamp Wiki
  Reply With Quote
Old 28th September 2014, 04:18 PM   #10
QSerraTico_Tico is offline QSerraTico_Tico  Europe
diyAudio Member
 
QSerraTico_Tico's Avatar
 
Join Date: Oct 2004
Lightbulb Faulty schematic

Quote:
Originally Posted by tiefbassuebertr View Post
For check I have in the moment the JC1 as to see in the first picture (post #1) but with serial number 1188.
I want to replace the electrolytics. 4 pieces are outside. How many electrolytics are inside of the module?
And in which direction is allocated the potted PCB? Is the solder site on top or at bottom?
The schematic of the JC1-DC module, which I have opened at those days, is attached as PDF-file here.
Unfortunately the JC1 module isn't the same.

Thank you for advices.
I dunno who designed the AC adapater schematic but I think it's wrong. You need a center-tapped transformer as the ground is not connected now.
Or alternatively use a virtual ground creator like TLE2426 as Jim Hagerman did here:
http://www.hagtech.com/pdf/piccolo2.pdf


Last edited by QSerraTico_Tico; 28th September 2014 at 04:21 PM.
  Reply With Quote

Reply


Which differences between Mark Levinson's "JC-1" and "JC-1DC"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
Can someone help with Mark Levinson JC-2? atlantaudiophil Solid State 31 30th July 2018 03:33 AM
Mark Levinson JC-2 problem ( broken Line driver ) ken1967 Solid State 7 8th May 2013 09:17 PM


New To Site? Need Help?

All times are GMT. The time now is 07:49 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki