Surface mount components poorly regarded - Page 2

capslock · 20th August 2002, 12:18 PM

Tiroth,

what is PSP and who makes them?

Thanks,

Eric

RADIOLEE · 20th August 2002, 01:26 PM

My reply to this post is a little off topic so I'll post a new one re: solid sate components and printed circuit boards.

Lee

peranders · 20th August 2002, 01:41 PM

Quote:

Originally posted by capslock
For SMD caps, the situation is easy. Most SMD caps are ceramic, if film caps are available, they are Mylar (polyester). I haven't come across a polypropylene or polystyrene SMD cap yet.

I know at least one plastic material but I have temporarly forgot it what is was called. Poly-something with lots of "e"'s.

peranders · 20th August 2002, 01:49 PM

SMD

Pros:
Small
Good HF performance
Cheap
Easy to get
Easy to pick with a machine

Cons:
Small! Can be hard to solder by hand and also be stressed by heat
Maybe negative properties due to it's small size

Fact

Most of our signal sources (through the whole chain) consists of SMD, (ADC, DAC etc).

I prefer to hold a low profile in this debate because I don't know at all the pros and cons when we talk the sound quality.

I suspect that many people have strong feelings in this matter but most of the negative parts comes from: Don't know anything, can't be good! Don't strangle me for this

peranders · 20th August 2002, 01:52 PM

Quote:

Originally posted by lieven

6. if you found the bad smd unsoldering is harder and require hot air devices with special mouth for each different size IC.

Just use two solering irons! One works sometimes also. It's hard to burn a SMD component.

tiroth · 20th August 2002, 02:06 PM

Quote:

what is PSP and who makes them?

Sorry, that was a typo. I meant PPS film, a plastic. Corneil-Dubiler makes the PPS SMT caps I am using; I'd provide a link but I can't seem to get to Mouser. Digikey sells the radial Panasonic ECH-S series, PPS, and according to Harry decent sounding.

Petter · 20th August 2002, 02:10 PM

SMD's are small which is good if you want to pack stuff closely together.

For resistors in particular, it may be a problem that they are small as they may in some cases be modulated by the audio signal ...

Petter

Elso Kwak · 20th August 2002, 02:45 PM

Quote:

Originally posted by lieven
I don't have an answer to quality of smd's (resistors or capacitors), but as a DIY or repair center you're confronted with:

1. little things that are harder to solder

This is typical for our society: ? don't work? trow away and buy new! It's cheaper....
This is NOT compatible with my DIY point of view.

My old eyeballs are already popping out even with +3.5 dioptrie glasses!
100 % agreed!
These SMT thingies were made and intended for machine insertion; NOT for hand soldering.
Yes repair? Repair business is almost dead here.
Buy a new one! Soldering my asynchronous reclocker with MC74VHC74 (SMT!) makes me feel making a spy beetle for the CIA.

tiroth · 20th August 2002, 02:51 PM

Actually I don't think SMT are that hard to solder if you have the flip-up style magnifier. Shrink packages are a pain, but SOIC are large enough to individually solder the pads and even 0603 are not that bad.

tvi · 20th August 2002, 03:31 PM

PPS = Polyphenylene sulphide,
Has properties fairly close to Polycarbonate.

PEN = Polyphenylene naphthalate

<a href="http://www.evox-rifa.com/n_america/film_capacitor_catalog.htm">Evox Rifa</a> make them along with many others

James

20th August 2002, 01:49 PM	#14
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	SMD Pros: Small Good HF performance Cheap Easy to get Easy to pick with a machine Cons: Small! Can be hard to solder by hand and also be stressed by heat Maybe negative properties due to it's small size Fact Most of our signal sources (through the whole chain) consists of SMD, (ADC, DAC etc). I prefer to hold a low profile in this debate because I don't know at all the pros and cons when we talk the sound quality. I suspect that many people have strong feelings in this matter but most of the negative parts comes from: Don't know anything, can't be good! Don't strangle me for this __________________ /Per-Anders (my first name) or P-A as my friends call me

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Surface mount components!	ungie	Swap Meet	12	25th September 2009 02:41 PM
Surface mount components for analogue audio... Yes or no???	Pilbromatic	Parts	26	6th August 2009 05:59 AM
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?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	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

20th August 2002, 12:18 PM	#11
capslock diyAudio Member Join Date: Feb 2002 Location: Germany	Tiroth, what is PSP and who makes them? Thanks, Eric

20th August 2002, 01:26 PM	#12
RADIOLEE diyAudio Member Join Date: Jul 2002 Location: Winona,MN	My reply to this post is a little off topic so I'll post a new one re: solid sate components and printed circuit boards. Lee

20th August 2002, 02:10 PM	#17
Petter diyAudio Member Join Date: Jan 2001 Location: Scandinavia	SMD's are small which is good if you want to pack stuff closely together. For resistors in particular, it may be a problem that they are small as they may in some cases be modulated by the audio signal ... Petter

20th August 2002, 02:51 PM	#19
tiroth diyAudio Member Join Date: Dec 2001 Location: Pittsburgh, PA, USA	Actually I don't think SMT are that hard to solder if you have the flip-up style magnifier. Shrink packages are a pain, but SOIC are large enough to individually solder the pads and even 0603 are not that bad.

20th August 2002, 03:31 PM	#20
tvi diyAudio Member Join Date: Apr 2001 Location: Moonee Ponds, Vic, Australia	PPS = Polyphenylene sulphide, Has properties fairly close to Polycarbonate. PEN = Polyphenylene naphthalate <a href="http://www.evox-rifa.com/n_america/film_capacitor_catalog.htm">Evox Rifa</a> make them along with many others James

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)