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Why the Hate for Spades?
Why the Hate for Spades?
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Old 11th October 2017, 08:04 PM   #21
xrk971 is offline xrk971  United States
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Why the Hate for Spades?
Many high end speaker voice coils use CCAW (copper coated aluminum wire) because it conducts well and is light - to keep moving mass low.

Take for example, the ScanSpeak Illuminator midrange ($275) "uses CCAW ribbon wire on a titanium bobbin..."

Scanspeak Illuminator 12MU/4731T-00 4.5" Midrange - 4 ohm

So you can try to avoid Al all you want, in the end the sound comes out via Al wire.
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Last edited by xrk971; 11th October 2017 at 08:08 PM.
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Old 11th October 2017, 08:07 PM   #22
xrk971 is offline xrk971  United States
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Why the Hate for Spades?
Quote:
Originally Posted by radtech View Post
I service one type of equipment that uses faston type terminals for several things. I've replaced lots of them for loosening up or becoming oxidized and overheating. They have their uses, but not reliable long term.
But then there are also countless examples of where this connector, when properly spec'd and implemented, such as in HVAC systems, automotive systems, refrigerators, pro-audio amps and speaker systems, etc. where it works fine for 20+ years. For my amps, I have never had an issue. But I have had issues with flying leads.
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Last edited by xrk971; 11th October 2017 at 08:12 PM.
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Old 11th October 2017, 08:15 PM   #23
Soundhappy is offline Soundhappy  France
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Quote:
Originally Posted by xrk971 View Post
So you can try to avoid Al all you want, in the end the sound comes out via Al wire.
I like aluminium spades connectors in my coffee machine
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Old 11th October 2017, 08:16 PM   #24
Nelson Pass is offline Nelson Pass  United States
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Why the Hate for Spades?
I use spades when the thing being connected has a spade lug, and circular
connectors when has a screw. These tend to be power switches and
rectifier bridges. Never had an issue.

I solder when they don't have these - it's easier, and also always works.

Doesn't suffer audio paranoia either.

Exception is speaker driver lugs, where I prefer to solder.
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Old 11th October 2017, 08:26 PM   #25
timpert is offline timpert  Netherlands
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Quote:
I believe spade connectors are only mandatory on mains connections.
No, they're not. As long as you do it securely, you are allowed to solder mains wiring directly to the board or other parts. But a dab of glue or heatshrink to protect and secure things is always a good idea. Many mains inlets have spade connectors that are allowed to be used as solder tabs. Check the datasheet of the part though.

In household appliances it's spade connectors galore. Even more fancy looking connector blocks have spades hidden in them. Sometimes they give problems, often due to moisture and heat (dishwashers and washing machines), but those are circumstances where many other connectors also give problems. If you run into problems with them in DIY audio, check for traces of spilled beer. They're generally trouble free in dry environments.

I agree with the idea of equipping boards with generic connector types. If you don't like them, you can always solder wires directly to the board, or use the spades as solder tabs. I think it is more an issue of avoiding inconvenience during board design that they are left out. Many DIY layouts simply look unfinished to me, adding appropriate connectors sure counts as a finishing touch in my book. Even when you intend to produce thing that are intended to never be taken apart, connectors help with assembly and reduce the chance for errors. Commercial stuff with wires soldered directly to the board are usually bottom-of-the-barrel cheap thingamabobs.

Screw terminals work much better when you crimp an end sleeve over stranded wire.
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Old 11th October 2017, 08:34 PM   #26
JeffYoung is offline JeffYoung  Ireland
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Why the Hate for Spades?
Quote:
Originally Posted by scottjoplin View Post
Yeah, I should switch to those -- they have a bit more spring pressure than waves.
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Old 11th October 2017, 08:38 PM   #27
Mark Johnson is offline Mark Johnson  United States
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Why the Hate for Spades?
The Power Supply Soft Start Board V.3, sold in the diyAudio store, uses the extremely nice "Keystone 8197" connector. Picture below, link to Mouser sales page

It's rated for 30 amperes, it's got six leads, it's got a screw terminal where you can attach either bare wire (boo!), or spade lugs (meh), or ring connectors (yay!).

_
Attached Images
File Type: png keystone.png (173.0 KB, 353 views)
File Type: jpg ringy.jpg (32.3 KB, 344 views)
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Old 11th October 2017, 08:42 PM   #28
2 picoDumbs is offline 2 picoDumbs  Australia
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Quote:
Originally Posted by Zen Mod View Post
if you want to build them that way , be my guest

also - I'm my own guest , if I don't want to build in that way

so - everyone is happy

It's simple isn't it.
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Old 11th October 2017, 08:44 PM   #29
Bare is online now Bare  Canada
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Quote:
Originally Posted by JeffYoung View Post
I've had plenty of them fail. Admittedly in one of my other hobbies (old cars) where the operating conditions are considerably more dire.
Spade connectors, as found on crapped out BMC 'automobiles'... let alone 40 years on,
were poor right off the assly line. Impossible to argue that.
Note though that those were Not quite the same part nor fitted into conditions normally found in an Amp.
Personally I'm less than enamoured by those Green blocks with screw connectors one usually sees on Ebay Chi Fi contraptions.

We all have prejudices
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Old 11th October 2017, 08:46 PM   #30
2 picoDumbs is offline 2 picoDumbs  Australia
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Quote:
Originally Posted by Nelson Pass View Post

Exception is speaker driver lugs, where I prefer to solder.
Thank you Nelson.
This is what I also do.
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