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

eBay mono LM1875 kit
eBay mono LM1875 kit
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 24th August 2019, 02:27 PM   #41
rabbitz is offline rabbitz  Australia
diyAudio Member
 
rabbitz's Avatar
 
Join Date: Jul 2003
Location: Newcastle, Australia
Quote:
Originally Posted by blackdod View Post
Why a regulated PSU? Well, I think that as a headphones amplifier or monitors amplifier, you don't need much more than 1.5 Amp....
Understand why now.
__________________
If there are no dogs in Heaven, then when I die I want to go where they went - Will Rogers
  Reply With Quote
Old 24th August 2019, 03:31 PM   #42
blackdod is offline blackdod  Europe
diyAudio Member
 
Join Date: Jun 2011
Location: Spain
^ it looks good.
  Reply With Quote
Old 25th August 2019, 02:55 PM   #43
chermann is offline chermann  Austria
diyAudio Member
 
Join Date: Jan 2017
Location: Vienna
Thanks Rabbitz

as i read this amp requires not a big psu.....thx for your ideas.
  Reply With Quote
Old 26th August 2019, 06:52 AM   #44
rabbitz is offline rabbitz  Australia
diyAudio Member
 
rabbitz's Avatar
 
Join Date: Jul 2003
Location: Newcastle, Australia
Received my kits but are damaged so on hold until I get replacements.

Must have been run over.

Needed the PCBs but the components were going to be thrown out.
Attached Images
File Type: jpg ebay_lm1875_damage_a.jpg (182.5 KB, 168 views)
File Type: jpg ebay_lm1875_damage_d.jpg (134.8 KB, 165 views)
__________________
If there are no dogs in Heaven, then when I die I want to go where they went - Will Rogers
  Reply With Quote
Old 26th August 2019, 08:07 AM   #45
rabbitz is offline rabbitz  Australia
diyAudio Member
 
rabbitz's Avatar
 
Join Date: Jul 2003
Location: Newcastle, Australia
Default lLM1875T chips

When I received the kits I had a look at the chips and compared to the others I had.

A. An Australian supplier who does substitute when original is not in stock. This one has 2 indents on the face, one above pin 1 and the other higher above pin 5. Looks like they have a manufacturing code in them B8/14 and B9/1. Not genuine from TI for sure.

B. As supplied with the kit and the cutouts in the sides looks like that of a TDA2050 from the pic at ESP P72 so unlikely to be a LM1875T.

C. LM1875T/NOPB supplied by Digikey which would be from TI.
Attached Images
File Type: jpg LM1875_chips_3.jpg (129.8 KB, 167 views)
__________________
If there are no dogs in Heaven, then when I die I want to go where they went - Will Rogers
  Reply With Quote
Old 26th August 2019, 08:09 AM   #46
blackdod is offline blackdod  Europe
diyAudio Member
 
Join Date: Jun 2011
Location: Spain
It seems that someone has put something very heavy on your PCBs.

It is interesting: You have received the same "LM1875" with the side notches.
  Reply With Quote
Old 26th August 2019, 08:13 AM   #47
blackdod is offline blackdod  Europe
diyAudio Member
 
Join Date: Jun 2011
Location: Spain
We post at the same time.


Yes, I am sure that the one with the notches on the sides is a TDA2050.

It doesn't sound bad, maybe the bass is a bit more present than I would like.
  Reply With Quote
Old 26th August 2019, 12:16 PM   #48
chermann is offline chermann  Austria
diyAudio Member
 
Join Date: Jan 2017
Location: Vienna
As i remember the compare session by John audio tech. the TDA2050 is "stronger" but acc. to the datasheet the1875 is better in THD...

never the less we get what we get in this kits ...

chris
  Reply With Quote
Old 26th August 2019, 01:00 PM   #49
blackdod is offline blackdod  Europe
diyAudio Member
 
Join Date: Jun 2011
Location: Spain
Really what I needed was pcb .. the rest, came as a gift
  Reply With Quote
Old 26th August 2019, 06:01 PM   #50
chermann is offline chermann  Austria
diyAudio Member
 
Join Date: Jan 2017
Location: Vienna
Quote:
Originally Posted by blackdod View Post
Really what I needed was pcb .. the rest, came as a gift

  Reply With Quote

Reply


eBay mono LM1875 kitHide 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
LM1875 Ebay dual channel pcb question nenad88 Chip Amps 11 29th August 2018 11:21 PM
Chinese Mono LM1875 Board Twil Chip Amps 54 23rd April 2018 08:04 AM
ebay lm1875 pcb asuslover Chip Amps 7 27th August 2016 03:58 AM
Running two LM1875 mono amp from single psu si82 Chip Amps 21 2nd June 2014 03:32 PM
Just fired up my new dual mono lm1875 Gainclone. Shoog Chip Amps 5 19th January 2004 06:09 PM


New To Site? Need Help?

All times are GMT. The time now is 09:51 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki