Surface mount components for analogue audio... Yes or no??? - diyAudio
Go Back   Home > Forums > Design & Build > Parts

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

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 20th June 2009, 03:13 AM   #1
diyAudio Member
 
Join Date: Jun 2009
Default Surface mount components for analogue audio... Yes or no???

Hi.
I'm just wondering what people's thoughts are on using surface mount components for analogue preamps. Mounting them isn't an issue in this case, and because of the physically smaller footprint I'd prefer to use them (lots to pack in to the case!!!).

I'd like to go all out with surface mount - Op-amps, resistors, capacitors, etc.

What's people's thoughts on this? I don't want any loss in quality of output or componentry by using these.

Cheers!
  Reply With Quote
Old 20th June 2009, 03:33 AM   #2
diyAudio Member
 
Join Date: Apr 2009
Send a message via MSN to bacon665
If you canw ork them then go for it but keep in mind they cant take the abuse their larger kin can and that cooling can be an issue
  Reply With Quote
Old 20th June 2009, 03:45 AM   #3
Mr Evil is offline Mr Evil  United Kingdom
diyAudio Member
 
Join Date: Aug 2004
Location: Behind you
I use them quite a lot. They're great when you need to squeeze things down into the smallest possible space, and you get a wider selection of some types of components.
__________________
https://mrevil.asvachin.eu/
  Reply With Quote
Old 20th June 2009, 03:52 AM   #4
jcx is offline jcx  United States
diyAudio Member
 
Join Date: Feb 2003
Location: ..
power dissapation has to be watched

for resistors going NiCr is relatively cheaper though

there is little choice in signal path C - PPS is likely the best smt film - also hand soldering smt flim can be difficult due to melting the cap
  Reply With Quote
Old 20th June 2009, 04:01 AM   #5
diyAudio Member
 
Join Date: Jun 2009
Quote:
Originally posted by bacon665
If you canw ork them then go for it but keep in mind they cant take the abuse their larger kin can and that cooling can be an issue

Cool, thanks for that! Good point about the cooling. My prototypes will be all PDIP etc so I can see how hot things get then. I was thinking about cooling the other day, this project is going to have something like 150 op-amps in a 4U case!!! I'm thinking a proper 100 hour test may be necessary - I need these things to go the distance!!!
  Reply With Quote
Old 20th June 2009, 10:08 PM   #6
star882 is offline star882  United States
diyAudio Member
 
star882's Avatar
 
Join Date: Mar 2007
Almost every modern sound card uses surface mount components on both the digital and analog sides. In fact, some sound cards have no through hole components at all.
__________________
"Fully on MOSFET = closed switch, Fully off MOSFET = open switch, Half on MOSFET = poor imitation of Tiffany Yep." - also applies to IGBTs!
  Reply With Quote
Old 21st June 2009, 01:32 AM   #7
diyAudio Member
 
Join Date: Jun 2009
Quote:
Originally posted by star882
Almost every modern sound card uses surface mount components on both the digital and analog sides. In fact, some sound cards have no through hole components at all.

Thanks. I don't normally consider soundcards to be of great audio quality anyway, unless its a PCI M-Audio (or similar) analogue card. Even then, they're still pretty bottom range as far as the professional industry goes. Some of the better brands do PCI/PCI-E cards, but these are normally digitally based.

I'm more referring to using surface mount in professional analogue preamps - Rackmount or Home Theatre.

Thanks for your input though!
  Reply With Quote
Old 21st June 2009, 02:05 AM   #8
diyAudio Member
 
BrianDonegan's Avatar
 
Join Date: Dec 2004
Location: TPA HQ (The Basement)
There is a great range of thin-film surface mount resistors available, which will give you much lower noise than thick-film. You also get shorter pathing and tighter bypassing capabilities (caps).

If you use ceramic caps, try hard to stick to C0G/NP0 rated caps (usually available up through .1uF), falling back to X7R for larger values if needed (up to >10uF).
__________________
Twisted Pear Audio
  Reply With Quote
Old 21st June 2009, 02:15 AM   #9
diyAudio Member
 
Join Date: Jun 2009
Quote:
Originally posted by BrianDonegan
There is a great range of thin-film surface mount resistors available, which will give you much lower noise than thick-film. You also get shorter pathing and tighter bypassing capabilities (caps).

If you use ceramic caps, try hard to stick to C0G/NP0 rated caps (usually available up through .1uF), falling back to X7R for larger values if needed (up to >10uF).

Great! That's the sort of information I love to hear!!! Thanks heaps!
  Reply With Quote
Old 21st June 2009, 03:22 AM   #10
diyAudio Member
 
Join Date: Mar 2007
Location: Canandaigua, NY USA
I don't have any (mental) problem with SMT except for caps. There are times when a COG can't be had in a large enough value (or would be the size of a Buick), and only a film will do. It's assumed you'll use a properly designed multi-layer board, so cooling shouldn't be a huge issue.
__________________
I may be barking up the wrong tree, but at least I'm barking!
  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
Surface mount components poorly regarded jwb Parts 52 7th September 2010 04:27 PM
Surface mount components! ungie Swap Meet 12 25th September 2009 02:41 PM
Surface mount drive components? ak_47_boy Class D 3 10th June 2008 07:53 AM
Soldering Surface Mount Components Ulas Digital Source 2 14th April 2006 03:38 AM


New To Site? Need Help?

All times are GMT. The time now is 10:10 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