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 12th February 2008, 11:26 PM   #1
diyAudio Member
 
Join Date: Nov 2007
Default Where can I buy Inductors & Capacitors?

I know radioshack has some, but getting Inductors and Capacitors of the rating I need is difficult. Anyone know of some decent stores (online) to get specificly what you need?
  Reply With Quote
Old 12th February 2008, 11:49 PM   #2
diyAudio Member
 
Join Date: Oct 2006
digikey.com
mouser.com

avnet
maplin...
  Reply With Quote
Old 12th February 2008, 11:53 PM   #3
KP11520 is offline KP11520  United States
diyAudio Member
 
KP11520's Avatar
 
Join Date: Apr 2007
Hi L_R,

It might be a good idea to describe the application(s) and values you need. That might influence some of the guys recommendations!

Good luck!

Regards//Keith
__________________
If Wile E. Coyote had enough money to buy all that ACME ****, why didn't he just buy dinner?
  Reply With Quote
Old 13th February 2008, 12:53 AM   #4
hermanv is offline hermanv  United States
diyAudio Member
 
Join Date: Apr 2004
Location: Northern California
Specializes in audiophile and crossover parts
http://www.percyaudio.com/

More of a discount and car audio, but lots of caps and inductors.
http://www.partsexpress.com/index.cf...k=part_express

Lots of parts including exotic caps.
http://www.partsconnexion.com/
  Reply With Quote
Old 13th February 2008, 01:06 AM   #5
diyAudio Member
 
Join Date: Nov 2007
TY for the replies. I plan on making crossovers/HP & LP filters. I am a newb in this department. So I havent quite figured out the difference between all of the Caps and Inductors I see. mH, uF, & ohm ratings is all I understand.
  Reply With Quote
Old 13th February 2008, 02:49 PM   #6
diyAudio Member
 
gtforme00's Avatar
 
Join Date: Oct 2004
L_R,

I hope you are enjoying your new hobby! There is alot of information (and disinformation) out there, and it can be daunting.

I highly recommend reading any of Rod Elliott's articles here:
http://sound.westhost.com/articles.htm

Particularly, read the articles on passive crossover design, and the articles dealing with capacitors and inductors individually.

A summary of the types of components and their characteristics follows:

Capacitors

For crossovers you will need bipolar (or non-polar) capacitors. Most aluminum electrolytic capacitors are polarized and therefore unsuitable. Non-polar aluminum electrolytics are available, and are usually the least expensive capacitor suitable for use in crossovers. Compared to film type capacitors, aluminum electrolytics have higher series resistance, worse tolerance, non-linear capacitance with frequency, and degrading capacitance with age. For these and other less objective reasons they are considered by most to be considerably inferior to film types. The only application where electrolytics are conditionally recommended is where very large values of capacitance are needed (say, for example greater than 20uF of capacitance).

There are many different types of film capacitors, and there is much controversy surrounding the benefits of different types. My recommendation is to stick with the components that provide the best personal value for your money (letting you decide what you value and how much money that is worth).

Inductors

Available in two basic types, air cored or ferromagnetic cored. The first having no ferromagnetic former on which the inductor is wound, the second having such a former. The reason for having a former is to increase the inductance for a given size (and usually cost) inductor. The disadvantage of ferromagnetic cores is increased distortion due to hysteresis of the core. This is more pronounced with higher frequencies than with low ones and with higher current than with low current. The usable frequency of a ferromagnetic cored inductor depends on the core type, but generally is fairly low, in the high hundreds to low thousands of Hertz. This makes air core inductors more suitable for high frequency crossovers such as midrange and tweeter crossovers.

Resistors

Available in wire-wound or metal oxide for passive crossover level power ratings. Wire-wound inductors are further separated into inductive vs. non-inductive types. A recent thread shows some measurements of resistance and inductance for some commonly available wire-wounds. The inductance of standard wire-wound resistors is not appreciably significant compared to the inductance of speaker voice coils, particularly in the woofer and midrange circuits but extensible to tweeter circuits. Non-inductive resistors may have their place in tweeter circuits where tweeters with very low inductance are used and high resistance values are needed, but this would be the exception rather than the rule.

I will now deviate from what could be considered (or construed as) general consensus and offer my personal list of suppliers:

www.madisound.com
Bennic brand of non-polar electrolytics and film capacitors. Good quality, good value for me. If MCM does not have them on sale, I buy them here.
Madisound brand of 15W and 25W resistors.
Madisound brand of inductors; well made but a little expensive.

www.mcminone.com
Bennic brand of film capacitors. They have a sale on these this month (February 2008) but are normally more expensive than madisound. They do not have good prices on non-polar electrolytic capacitors. If you have a lot of Bennic capacitors to order when they are on sale, it can be worth it to pay the reasonable shipping.
AMS inductors are fairly priced, sometimes on sale or clearance.

www.partsexpress.com
Dayton brand of capacitors. These look identical to Bennic and are claimed by most to be made by Bennic for Dayton.
Non-branded non-polar electrolytics are much physically smaller than Bennic non-polars for the same value, but don't measure appreciably worse. Inductors are over-priced IMO. (Compare their Erse prices to Zalytron and you will see what I mean). They have a good selection of inexpensive 5W, 10W, and 20W wire-wound resistors.

www.zalytron.com
Not the easiest to order from (have to phone in orders), but have excellent prices on Erse inductors. I consider Erse inductors to be of excellent quality. I personally shop here first for inductors, you can save a lot of money doing so.

I hope that this helps.

Regards,
David
  Reply With Quote
Old 13th February 2008, 03:07 PM   #7
KP11520 is offline KP11520  United States
diyAudio Member
 
KP11520's Avatar
 
Join Date: Apr 2007
Hi David,

Thanks for teaching some of us other progressing new guys too!

That is the kind of response they all should be!

Regards//Keith
__________________
If Wile E. Coyote had enough money to buy all that ACME ****, why didn't he just buy dinner?
  Reply With Quote
Old 13th February 2008, 09:16 PM   #8
diyAudio Member
 
Join Date: Dec 2007
Location: Vermont
www.newark.com

www.alliedelec.com

Here's a couple more websites to try.

Good luck and enjoy!

Dave
  Reply With Quote
Old 14th February 2008, 01:42 AM   #9
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
for crossover inductors and capacitors I use Madisound and PartsExpress.

I will echo the comments with respect to Mouser, Digikey, Allied, Avnet, Future for other stuff. Mouser and Future carry WIMA polypropylene caps which are great for audio. I order from Madisound and Digikey probably once a week.
  Reply With Quote
Old 14th February 2008, 05:47 AM   #10
diyAudio Member
 
Join Date: Nov 2007
THANKS A LOT GT! That will save me a few headaches in the future. I knew to get nonpolar, but very glad you mentioned it due to I may not have remembered when ordering. I will save this thread for future reference.


Digikey was the only place I knew of to get the components. But when I went searching I realized quickly that I didnt know enough to start buying stuff.

(PS: It is more of a new department of an old hobby. I am just slowly needing to dig deeper to get what I want. )
  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
Trade your crossover parts. Capacitors, inductors and resistors. owdi Swap Meet 0 21st August 2007 10:27 PM
Inductors & Capacitors Mutley666 Swap Meet 6 21st June 2005 06:39 PM
Resistors, capacitors, inductors! Im about to throw the towel in. Xristo Multi-Way 6 1st March 2005 02:34 PM
Types of capacitors / inductors mark.carline Multi-Way 2 20th April 2004 06:28 PM
Guidelines on inductors, resistors, capacitors Dave Bullet Multi-Way 7 21st May 2003 09:15 AM


New To Site? Need Help?

All times are GMT. The time now is 09:13 PM.


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