What LM3875 to buy? - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

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 30th December 2003, 03:06 PM   #1
diyAudio Member
 
Join Date: Jan 2003
Location: Maple Grove, MN
Send a message via AIM to AJ Bertelson
Default What LM3875 to buy?

http://www.newark.com/NewarkWebComme...LM3875&x=0&y=0

I am about to pull the trigger on getting the gainclone parts together but I witch chip should I buy?
  Reply With Quote
Old 30th December 2003, 04:12 PM   #2
diyAudio Member
 
Magnetmaz's Avatar
 
Join Date: Nov 2002
Location: Pittsburgh, PA
Send a message via AIM to Magnetmaz
when i built my gainclone i just ordered free samples from National semi.....didn't even have to pay for shipping.

http://www.national.com/pf/LM/LM3875.html

I got 10 of the LM3875TF

That was sorta cheap of me, though, and i don't highly advise it to people who make moral dilemnas out of everything

-Maz
  Reply With Quote
Old 30th December 2003, 06:31 PM   #3
diyAudio Member
 
Join Date: Jan 2003
Location: Maple Grove, MN
Send a message via AIM to AJ Bertelson
Yea I was thinking of going though NS but I remember seeing a 8-10 week lead time.
  Reply With Quote
Old 30th December 2003, 07:43 PM   #4
elizard is offline elizard  Canada
diyAudio Member
 
Join Date: Mar 2003
Location: Winnipeg, MB
Send a message via MSN to elizard
I recommend the TF
The T is a non-isolated chip, while the TF is the isolated version of the lm chip.

Gainclone doesn't run hot anyway, so you won't have much problems w/ heat dissipation, and using a non-isolated chip only adds the headache of making sure its isolated from the heatsink.
  Reply With Quote
Old 30th December 2003, 07:55 PM   #5
diyAudio Member
 
Magnetmaz's Avatar
 
Join Date: Nov 2002
Location: Pittsburgh, PA
Send a message via AIM to Magnetmaz
in regards to the lead time, NS lets you choose which of their distributors you wish to recieve the chips from. I chose arrow and got them in 1-2 weeks.

-Maz
  Reply With Quote
Old 30th December 2003, 08:17 PM   #6
elizard is offline elizard  Canada
diyAudio Member
 
Join Date: Mar 2003
Location: Winnipeg, MB
Send a message via MSN to elizard
http://www.digikey.com/scripts/DkSea...247941&Site=US

no lead time ..
  Reply With Quote
Old 31st December 2003, 06:27 AM   #7
diyAudio Member
 
neutron7's Avatar
 
Join Date: Dec 2003
Location: Toronto Canada
The "f" version is isolated, I take it that means that you can bolt (2 of them) directly to the heatsink even if it is connected to ground.
  Reply With Quote
Old 17th January 2004, 05:34 PM   #8
diyAudio Member
 
Join Date: Jan 2004
Location: malaysia
just wondering, how really good is a gaincard compared to those megabucks amp?
  Reply With Quote
Old 17th January 2004, 07:01 PM   #9
elizard is offline elizard  Canada
diyAudio Member
 
Join Date: Mar 2003
Location: Winnipeg, MB
Send a message via MSN to elizard
Quote:
Originally posted by neutron7
The "f" version is isolated, I take it that means that you can bolt (2 of them) directly to the heatsink even if it is connected to ground.
that's correct


Quote:
Originally posted by skyraider
just wondering, how really good is a gaincard compared to those megabucks amp?
Yeech, do a search through the chip amp forum and you'll find many people who argue back and forth.

All I can say is that a gainclone has a surprising sound (when you look at it you think to yourself "THIS is going to make sound???")
  Reply With Quote
Old 17th January 2004, 09:10 PM   #10
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
Blog Entries: 4
Quote:
Originally posted by neutron7
The "f" version is isolated, I take it that means that you can bolt (2 of them) directly to the heatsink even if it is connected to ground.
The look like this:
Click the image to open in full size.
__________________
/Per-Anders (my first name) or P-A as my friends call me
Tube Buffered Gainclone in work |Thread || Diamond buffer |Thread for the group buy | Wiki
  Reply With Quote

Reply


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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Lm3875 Rev C sumacSK Chip Amps 41 2nd January 2006 01:51 PM
yet one more lm3875 karma Chip Amps 8 27th July 2005 08:48 PM
WTB: LM3875 pcb vdi_nenna Swap Meet 7 27th July 2005 03:19 PM
LM3875 into 4 Ohm audioPT Chip Amps 12 7th July 2005 12:14 AM
LM3875 60W Amp juiceman Chip Amps 3 18th February 2005 06:28 PM


New To Site? Need Help?

All times are GMT. The time now is 09:11 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2