'LGT' Construction Diary - Page 66

ShinOBIWAN · 3rd April 2007, 11:25 PM

Quote:

Originally posted by Vikash

Ahh, that's what I was wondering. Didn't realise they were Alu frames

Yep I wasn't really sure if they were steel or such until I started cutting. You can always tell if your dealing with steel because sparks *will* start to fly and you'll have a really tough time with a router but in comparison alu peels off in bits because its much softer.

You wouldn't believe how pleased I was when I realised it was alu and not steel.

A bit of general FYI that's some related:
Most tweeter faceplates are alu or plastic and are good for routing into if you need to get the mid-tweeter spacing as close as possible.

On the other hand, alu baskets on drivers are pretty rare because it costs more than steel. AT and Seas use alu baskets and are the ones that I know of.

terry j · 3rd April 2007, 11:28 PM

could you not use a magnet to find out whether or not it is steel prior to the routing attempt?? That way at least you will know if you need to take it super easy with the routing depth etc

ShinOBIWAN · 3rd April 2007, 11:32 PM

Quote:

Originally posted by terry j
could you not use a magnet to find out whether or not it is steel prior to the routing attempt?? That way at least you will know if you need to take it super easy with the routing depth etc

Duh, now why didn't I think of that? No seriously, when I read back you post I thought "Jesus I'm dumb". I've been putting off this little job for the past few weeks simply because I was worried about cocking things up if it was steel. Had I used a magnet... well I will if there's a next time

Cheers for that Terry.

Grumpy_Git · 4th April 2007, 09:16 AM

"if" ?

Nick.

fgroen · 4th April 2007, 09:42 AM

As far as I'm aware, die cast baskets for cone drivers (see AT website) are always aluminium (or plastic for the el-cheapo ones).

Eg. Eton, Auday, Focal, Vifa etc all have alu baskets when die cast.
Only those baskets punched out of sheet metal are iron. They are easily distinguishable from cast baskets.

A rare exception to this rule was a pair of 5" Thorolf woofers I had back in the 80's. These had cast iron baskets, and it showed. They were rough as guts.

ShinOBIWAN · 4th April 2007, 12:09 PM

Quote:

Originally posted by Grumpy_Git
"if" ?

Nick.

I meant if I decide to chop up a driver frame again.

ShinOBIWAN · 4th April 2007, 12:12 PM

Quote:

Originally posted by fgroen
As far as I'm aware, die cast baskets for cone drivers (see AT website) are always aluminium (or plastic for the el-cheapo ones).

Eg. Eton, Auday, Focal, Vifa etc all have alu baskets when die cast.
Only those baskets punched out of sheet metal are iron. They are easily distinguishable from cast baskets.

A rare exception to this rule was a pair of 5" Thorolf woofers I had back in the 80's. These had cast iron baskets, and it showed. They were rough as guts.

Ah that's fairly good news then, although I still wouldn't recommend it as whatever your cutting up has virtually zero resale value. Not good when you just 'defaced' £600 worth of mids

fgroen · 4th April 2007, 12:39 PM

Quote:

Originally posted by ShinOBIWAN

Ah that's fairly good news then, although I still wouldn't recommend it as whatever your cutting up has virtually zero resale value. Not good when you just 'defaced' £600 worth of mids

Agree. Can never be too cautious.

ShinOBIWAN · 5th April 2007, 09:54 PM

Rough spray job before final finishing:

Ray Collins · 5th April 2007, 10:02 PM

Have these been sanded any?

Ray

4th April 2007, 09:16 AM	#654
Grumpy_Git diyAudio Member Join Date: Oct 2001 Location: London, England	"if" ? Nick. __________________ Real Engineers do it on a budget.....

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

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

3rd April 2007, 11:28 PM	#652
terry j diyAudio Member Join Date: Aug 2006	could you not use a magnet to find out whether or not it is steel prior to the routing attempt?? That way at least you will know if you need to take it super easy with the routing depth etc

4th April 2007, 09:42 AM	#655
fgroen diyAudio Member Join Date: Nov 2005	As far as I'm aware, die cast baskets for cone drivers (see AT website) are always aluminium (or plastic for the el-cheapo ones). Eg. Eton, Auday, Focal, Vifa etc all have alu baskets when die cast. Only those baskets punched out of sheet metal are iron. They are easily distinguishable from cast baskets. A rare exception to this rule was a pair of 5" Thorolf woofers I had back in the 80's. These had cast iron baskets, and it showed. They were rough as guts.

5th April 2007, 09:54 PM	#659
ShinOBIWAN diyAudio Member Join Date: Feb 2004 Location: UK	Rough spray job before final finishing:

5th April 2007, 10:02 PM	#660
Ray Collins diyAudio Member Join Date: Jan 2006 Location: Mobile, Al.	Have these been sanded any? Ray

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