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

Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

JRC2068 substitute plug & play!!
JRC2068 substitute plug & play!!
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 15th August 2018, 10:03 AM   #1
mprivitera1 is offline mprivitera1  Italy
diyAudio Member
 
Join Date: Jul 2012
Location: SICILIA
Default JRC2068 substitute plug & play!!

Hello guys,
an advice to replace JRC2068 (present on Proton AS2631) with other better, without making changes to the circuit, plug & play .. !!
Thank you
  Reply With Quote
Old 15th August 2018, 10:13 AM   #2
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
JRC2068 substitute plug & play!!
The 2068 is an excellent device and similar in many ways to the NE5532. Hard to give recommendations without seeing a circuit, and simply swapping for something like the LM4562 isn't going to give you any better/different sound quality.

If you want to go for something that might genuinely give a different type of subjective quality then you need to look at the OPA2604 (obtained from authorised distributors only) but you still need to verify the circuit is suitable.

That would be my advice fwiw
  Reply With Quote
Old 15th August 2018, 11:01 AM   #3
johnego is offline johnego  Indonesia
diyAudio Member
 
Join Date: Dec 2017
JRC2068 is very good when it is operating in its quite narrow comfort zone. I don't believe that in your preamp there is only one single opamp per channel?
  Reply With Quote
Old 15th August 2018, 10:19 PM   #4
mprivitera1 is offline mprivitera1  Italy
diyAudio Member
 
Join Date: Jul 2012
Location: SICILIA
Quote:
Originally Posted by Mooly View Post
The 2068 is an excellent device and similar in many ways to the NE5532. Hard to give recommendations without seeing a circuit, and simply swapping for something like the LM4562 isn't going to give you any better/different sound quality.

If you want to go for something that might genuinely give a different type of subjective quality then you need to look at the OPA2604 (obtained from authorised distributors only) but you still need to verify the circuit is suitable.

That would be my advice fwiw

... I appreciate your advice .... Thanks
  Reply With Quote
Old 15th August 2018, 10:27 PM   #5
mprivitera1 is offline mprivitera1  Italy
diyAudio Member
 
Join Date: Jul 2012
Location: SICILIA
Quote:
Originally Posted by johnego View Post
JRC2068 is very good when it is operating in its quite narrow comfort zone. I don't believe that in your preamp there is only one single opamp per channel?

seven jrc2068 are needed:
- The first 3 are at the exit of the DAC
- The other 3 are output, after volume adjustment
-one It is used to mix the LFE track on the central track and is used as an adder.
  Reply With Quote
Old 15th August 2018, 10:30 PM   #6
mprivitera1 is offline mprivitera1  Italy
diyAudio Member
 
Join Date: Jul 2012
Location: SICILIA
Quote:
Originally Posted by mprivitera1 View Post
seven jrc2068 are needed:
- The first 3 are at the exit of the DAC
- The other 3 are output, after volume adjustment
-one It is used to mix the LFE track on the central track and is used as an adder.

.. unfortunately not schematic electric of it, I took this information from another owner of it ...
  Reply With Quote
Old 16th August 2018, 03:04 AM   #7
johnego is offline johnego  Indonesia
diyAudio Member
 
Join Date: Dec 2017
You can probably purchase three different opamps and find the best combination. Output dac usually requires fast slew rate opamps but 2068 is only 6v/us. 2068 needs a buffer but it can be an output buffer for its other half. For input buffer it is not optimal (its a bipolar input with low input impedance, worse when it is in inverted configuration)
  Reply With Quote
Old 19th August 2018, 03:29 PM   #8
rsavas is offline rsavas  Canada
diyAudio Member
 
Join Date: Aug 2012
Location: Ontario
imo, I would just leave it alone.
what package is the 2068 in? sip dip, so? 8 or 9 pin version.
these NJM2068 are used in a yamaha T-85 tuner, i think i am leaving mine in
Ask High Quality Service Manuals Schematics Repair User Owner Operating Instructions Vintage Classic Audio Stereo PDF FREE if they have a manual.
  Reply With Quote
Old 19th August 2018, 04:37 PM   #9
mprivitera1 is offline mprivitera1  Italy
diyAudio Member
 
Join Date: Jul 2012
Location: SICILIA
Quote:
Originally Posted by rsavas View Post
imo, I would just leave it alone.
what package is the 2068 in? sip dip, so? 8 or 9 pin version.
these NJM2068 are used in a yamaha T-85 tuner, i think i am leaving mine in
Ask High Quality Service Manuals Schematics Repair User Owner Operating Instructions Vintage Classic Audio Stereo PDF FREE if they have a manual.

.. thank you, help me
  Reply With Quote

Reply


JRC2068 substitute plug & play!!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
Plug-and-play compact 50W+ amplifier? dumptruck Parts 0 6th July 2013 12:29 AM
out of the box plug and play solution? flataffect Chip Amps 0 8th August 2010 05:23 PM
Plug and Play Power Supply exeric Tubes / Valves 9 10th June 2010 04:24 AM
Plug 'N' Play B+ time delay Renron Tubes / Valves 1 5th December 2007 02:33 AM
A plug'n'play EL34/KT66/6B4 SE amp SHiFTY Tubes / Valves 6 11th May 2003 12:33 PM


New To Site? Need Help?

All times are GMT. The time now is 03:11 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki