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

Group Buys Members group buys

LME49600 simple headamplifier
LME49600 simple headamplifier
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 2nd March 2015, 12:39 PM   #21
scafas is offline scafas  Italy
diyAudio Member
 
Join Date: Dec 2007
Location: italia
Quote:
Originally Posted by scafas View Post
special offer :
2 pcb with tracking ship incluse for 19,50eu.
special offer : pcb with tracking ship incluse for 19,50eu
  Reply With Quote
Old 12th March 2015, 06:11 PM   #22
HOPHANTHIET is offline HOPHANTHIET  Canada
diyAudio Member
 
Join Date: Mar 2006
Location: VANCOUVER.BC.CANADA
Send a message via MSN to HOPHANTHIET
Default LME49600 pcb

Quote:
Originally Posted by scafas View Post
some pcb for sale
Received the pcb today ,Mars 11th.Can't believe it takes 3 weeks from Italy
to Canada .But the pcb is first rate .and Thank you .
__________________
SANTA
  Reply With Quote
Old 12th March 2015, 06:50 PM   #23
scafas is offline scafas  Italy
diyAudio Member
 
Join Date: Dec 2007
Location: italia
Quote:
Originally Posted by HOPHANTHIET View Post
Received the pcb today ,Mars 11th.Can't believe it takes 3 weeks from Italy
to Canada .But the pcb is first rate .and Thank you .
remember to mount the integrated lme49600 upside , the metal must be on top.

good job tks
  Reply With Quote
Old 17th March 2015, 03:18 PM   #24
scafas is offline scafas  Italy
diyAudio Member
 
Join Date: Dec 2007
Location: italia
Quote:
Originally Posted by AndrewT View Post
That's clever !!

and saves having to preheat the PCB to solder the heatsink pad to the underlying copper trace.

It's more than clever, you are brilliant.

How easy is it to bend the Buffer leadouts to face onto the reversed pads?
lme49600 special price with free ship ....8eu.!!!! only for today
  Reply With Quote
Old 3rd June 2015, 02:34 PM   #25
cameronw is offline cameronw
diyAudio Member
 
Join Date: Apr 2011
Smile PCB is fine

Hi,
I just received this PCB and it is just fine.

I agree..., the TI application engineers did a fine job.

There is no problem with the ground layout ("Fill"). it is less wasteful to fab the board and hence, more environmentally friendly.

The DC Servo is there to counter DC offsets within the circuit and does a great job at it. DC Servo's are not used for "Protection". If one is worried about "DC - Protection" they will need to add a Speaker protection ckt/pcb diy kit.

Thanks for making this fine PCB available.
  Reply With Quote
Old 16th January 2018, 05:18 PM   #26
scafas is offline scafas  Italy
diyAudio Member
 
Join Date: Dec 2007
Location: italia
Default new design pcb amplifier

the new printed circuit for the construction of the headphone amplifier with lme49600 is now available.
the design has been improved, increased power supply with more capacitors, the heat sinks are now on the pcb, the volume control is set up for the installation of a commercial alps potentiometer and finally, input capacitors have been added.
the assembly of the integrated ones is upside down to allow the installation of the heatsinks as in the old pcb.
the wiring diagram is visible in the original TI datasheet.
who is interested in receiving the pcb can contact me also with private messages.
Click the image to open in full size.
LME49600 simple headamplifier
  Reply With Quote
Old 4th February 2018, 01:10 PM   #27
scafas is offline scafas  Italy
diyAudio Member
 
Join Date: Dec 2007
Location: italia
Default pcb available

Quote:
Originally Posted by scafas View Post
the new printed circuit for the construction of the headphone amplifier with lme49600 is now available.
the design has been improved, increased power supply with more capacitors, the heat sinks are now on the pcb, the volume control is set up for the installation of a commercial alps potentiometer and finally, input capacitors have been added.
the assembly of the integrated ones is upside down to allow the installation of the heatsinks as in the old pcb.
the wiring diagram is visible in the original TI datasheet.
who is interested in receiving the pcb can contact me also with private messages.
Click the image to open in full size.
LME49600 simple headamplifier
pcb are available for 12$ incluse ship .
  Reply With Quote
Old 7th February 2018, 05:58 PM   #28
scafas is offline scafas  Italy
diyAudio Member
 
Join Date: Dec 2007
Location: italia
Quote:
Originally Posted by scafas View Post
pcb are available for 12$ incluse ship .
3pcs available
  Reply With Quote
Old 7th February 2018, 07:10 PM   #29
scafas is offline scafas  Italy
diyAudio Member
 
Join Date: Dec 2007
Location: italia
many people have asked me if I can also provide a pair of original LME49600 TI and I answer that from now I can make a package including 1pcb and two integrated lme49600 to 23eu. including shipping.
  Reply With Quote
Old 9th April 2018, 03:49 PM   #30
raoultrifan is offline raoultrifan  Romania
diyAudio Member
 
Join Date: Jan 2014
Location: Iasi, ROU
Quote:
Originally Posted by scafas View Post
no security , I trust the technology of texas Instrumens
I really think the "security" is the DC-servo already implemented: "To allow for a DC-coupled signal path and to ensure minimal output DC voltage regardless of the closed-loop gain, the other half of the U2 is configured as a DC servo. By constantly monitoring U2-As output, the servo creates a voltage that compensates for any DC voltage that may be present at the output. A correction voltage is generated and applied to the feedback node at U2-A, pin 2.", unless the input source has a DC-voltage more than the input opamp used in the voltage-amplification-stage, in our case it could be LME49720, so +/-2V more or less from the power rails +/-13V if +/-15V rail is used), based on http://www.ti.com/lit/ds/symlink/lme49720.pdf.

However, a 4.7uF could be easily added between the input source and the amplifier, but there's no need for 2 input dual-opamps anymore and entire PCB might need rework to save some costs. However, AFAIK DC-servo is considered to be an upgrade over the non-polarized caps on the input of an amplifier.

The idea with the output buffer mounted vice-versa is awesome and I was thinking many times why manufacturers are not using this in their products. I really think they think at the base price and not the heat dissipated to the PCB around the buffers.
  Reply With Quote

Reply


LME49600 simple headamplifierHide 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
Lme49600 headphone amp Dr. Popo Chip Amps 67 12th April 2013 12:55 AM
My LME49600/49610 PCB design AAK Solid State 26 5th July 2012 01:12 PM
What's the difference Between LME49600 and LME49610? bashenan4455 Chip Amps 4 20th September 2011 04:30 AM
Compound OpAmp w LME49600 jackinnj Parts 1 25th February 2010 05:36 PM
What's the difference Between LME49600 and LME49610? bashenan4455 Chip Amps 3 14th February 2010 12:22 PM


New To Site? Need Help?

All times are GMT. The time now is 03:21 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki