T39: 4 x 20", 2 x 28" completed

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Bruce Weldy
Posts: 8301
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: Another Australian T39 build

#46 Post by Bruce Weldy »

biggerrigger wrote:I run all night at full war volume and my stack of 4 have never moved. They are quite stable when stacked and v-plated.
My V-plated T39s walked around some on a slick cement dance floor. Not bad, but had to re-position during breaks.

6 - T39 3012LF
4 - OT12 2512
1 - T24
1 - SLA Pro
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

Ryan A
Posts: 867
Joined: Thu Mar 01, 2012 11:19 am
Location: Minneapolis, Minnesota

Re: Another Australian T39 build

#47 Post by Ryan A »

Nothing some anti-skid pads can't fix...

biggerrigger
Posts: 560
Joined: Sun Jan 28, 2007 6:32 am
Location: ohio

Re: Another Australian T39 build

#48 Post by biggerrigger »

Bruce Weldy wrote:
biggerrigger wrote:I run all night at full war volume and my stack of 4 have never moved. They are quite stable when stacked and v-plated.
My V-plated T39s walked around some on a slick cement dance floor. Not bad, but had to re-position during breaks.
I am running 25in Lab12 loaded cabs. Maybe the extra weight of my cabs keep them from moving?
Built
4-25" Lab12 loaded T39's
2-DR250's Melded array
2-DR250's Flat array

Bruce Weldy
Posts: 8301
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: Another Australian T39 build

#49 Post by Bruce Weldy »

biggerrigger wrote:
Bruce Weldy wrote:
biggerrigger wrote:I run all night at full war volume and my stack of 4 have never moved. They are quite stable when stacked and v-plated.
My V-plated T39s walked around some on a slick cement dance floor. Not bad, but had to re-position during breaks.
I am running 25in Lab12 loaded cabs. Maybe the extra weight of my cabs keep them from moving?
Could be, but it probably has more to do with how slick the floor is that they are on....putting rubber feet on the side would fix it.

6 - T39 3012LF
4 - OT12 2512
1 - T24
1 - SLA Pro
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

Grant Bunter
Posts: 6915
Joined: Mon Nov 28, 2011 11:12 am
Location: Ilfracombe Queensland Australia
Contact:

Re: Another Australian T39 build

#50 Post by Grant Bunter »

V plates painted both sides now. So they are ready...

Did I mention I didn't use larger T nuts in the plates themselves?

Instead, I over drilled the holes I made through the V plate and cab with a 1/2" drill (in the V plate only).
Then cut 1/2" long pieces of 1/2" copper pipe. A little epoxy on the pipe pieces, hammered into the V plate. Nice firm fit, they're going nowhere...
Built:
DR 250: x 2 melded array, 2x CD horn, March 2012 plans.
T39's: 4 x 20" KL3010LF , 2 x 28" 3012LF.
WH8: x 6 with melded array wired series/parallel.
Bunter's Audio and Lighting "like"s would be most appreciated...

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Harley
Posts: 5763
Joined: Mon May 08, 2006 2:45 pm
Location: Christchurch, New Zealand - Authorised BFM Cab Builder

Re: Another Australian T39 build

#51 Post by Harley »

Grant Bunter wrote:Instead, I over drilled the holes I made through the V plate and cab with a 1/2" drill (in the V plate only).
Then cut 1/2" long pieces of 1/2" copper pipe. A little epoxy on the pipe pieces, hammered into the V plate. Nice firm fit, they're going nowhere...
Nice :clap:
ImageSemi-retired: Former Australia and New Zealand Authorised BFM cab builder.

Grant Bunter
Posts: 6915
Joined: Mon Nov 28, 2011 11:12 am
Location: Ilfracombe Queensland Australia
Contact:

Re: Another Australian T39 build

#52 Post by Grant Bunter »

Harley wrote:
Grant Bunter wrote:Instead, I over drilled the holes I made through the V plate and cab with a 1/2" drill (in the V plate only).
Then cut 1/2" long pieces of 1/2" copper pipe. A little epoxy on the pipe pieces, hammered into the V plate. Nice firm fit, they're going nowhere...
Nice :clap:
Thanks Harley
Built:
DR 250: x 2 melded array, 2x CD horn, March 2012 plans.
T39's: 4 x 20" KL3010LF , 2 x 28" 3012LF.
WH8: x 6 with melded array wired series/parallel.
Bunter's Audio and Lighting "like"s would be most appreciated...

fyah2k5
Posts: 66
Joined: Tue Mar 13, 2012 10:13 am
Location: Manchester, Jamaica

Re: Another Australian T39 build. 4 x 20" BP loaded. Complet

#53 Post by fyah2k5 »

:clap: :clap: :clap: :clap: :clap: :clap: :clap: :clap: :clap: :clap: :clap: definite motivation for me to get started. cant wait to have four of these rocking some dancehall music.

Grant Bunter
Posts: 6915
Joined: Mon Nov 28, 2011 11:12 am
Location: Ilfracombe Queensland Australia
Contact:

Re: Another Australian T39 build. Building more...

#54 Post by Grant Bunter »

Well, time to update this thread!

I've had the ply ($15AU per sheet, 8 x 4, Radiata/Arauco) for a while for more cabs.
Got 4 more BP102 drivers some time ago.
Got bundles of PL.
Pretty much all the hardware.

Then, last week, up pops on Aussie e-bay a pair of 3012lf's, unused in opened boxes.
$450AU BIN + postage. I'm assuming they were brought in, as that's less for the pair than RRP for one if buying locally.
What the heck, let's see what the fuss is about lol...

Today, began cutting up, for a build of 2 x 28" wide cabs.
2 sides, 2 x panel's 1, 2, 3, 4, anchors, 9, 11.

Since my last builds, scored a new in box Triton MK3 table saw compliments of my father (He also gave me the router table attachment, also new in box). I bought the matching saw.
Using the MK3 when I could, and my trusty hand held circular saw, all cuts to date in three hours.
That's not a record speed by any means, I had to trim and square the sheets as I went.

There's a few things I'm going to try in this build;
1. A complete panel seven. 2 cut already. If I had thought more about this (I'd already cut the anchors) I could have cut out the access panel section and had stock for the anchors.
2. Complete access panel flanges as one piece.
3. Make a handle jig.
4. Attach the driver with screws. Will add the screw retention blocks which aren't in my older plans.

Probably go angled back on the bottom of the cab too

Otherwise the build will be exactly the same as my other 4 cabs.

I'm not posting pics of the entire process. It's already well enough documented in this thread already.

Will post up pics of the variances, and the finished cabs though.

Oh, and the cabs will need to be finished with Duratex. Will see if it comes up much the same as the others with the same roller I used before.

Why? I'm finding my 4 x 20" BP loaded cabs are thumping, but about 3dB down from my Beta10a loaded DR250's. I'm finding my DR250's are getting harsh pushing up to unity on the master faders.
So, it's time to add more of those to, but that's another thread :D
Built:
DR 250: x 2 melded array, 2x CD horn, March 2012 plans.
T39's: 4 x 20" KL3010LF , 2 x 28" 3012LF.
WH8: x 6 with melded array wired series/parallel.
Bunter's Audio and Lighting "like"s would be most appreciated...

Bruce Weldy
Posts: 8301
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: Another Australian T39 build. Building more...

#55 Post by Bruce Weldy »

The fever can pop up at anytime.

Enjoy the build.

6 - T39 3012LF
4 - OT12 2512
1 - T24
1 - SLA Pro
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

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Chris_Allen
Posts: 3355
Joined: Wed Jul 11, 2007 2:43 pm
Location: Huddersfield, UK

Re: Another Australian T39 build. Building more...

#56 Post by Chris_Allen »

I also have stacks of wood and stacks of drivers 'waiting'.
Built:
6xDR200, 2xT39, 2xT48, 2xJack110, 1xOmni10.5, 1xAutotuba, 1xT18, 1xSLA Pro, 1xW8, 1xW10

howiez
Posts: 382
Joined: Sun Mar 16, 2014 5:23 pm
Location: Fox Valley, Wisconsin

Re: Another Australian T39 build. Building more...

#57 Post by howiez »

Beautiful work!

Grant Bunter
Posts: 6915
Joined: Mon Nov 28, 2011 11:12 am
Location: Ilfracombe Queensland Australia
Contact:

Re: Another Australian T39 build. Building more...

#58 Post by Grant Bunter »

I've been slack in updating this thread.

The cabs have been built, other than access panels, for a couple of months now.
Still in the process of painting, attaching corners, wheels, speakons etc.

Drivers are broken in.
I didn't end up doing a complete panel 7 or access panel flange. Reading the plans, I had to check that the driver would fit with a temporary install of the top access panel flange before attaching it permanently. I now know I could have done what I intended.

I went with 3 braces for the width of the cab for all braces except the 4-6 brace.
This not only keeps brace spacing similar to my older cabs, but positively ensures lack of panel flex...
Built:
DR 250: x 2 melded array, 2x CD horn, March 2012 plans.
T39's: 4 x 20" KL3010LF , 2 x 28" 3012LF.
WH8: x 6 with melded array wired series/parallel.
Bunter's Audio and Lighting "like"s would be most appreciated...

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Tom Smit
Posts: 7457
Joined: Sat Jan 05, 2008 1:24 pm
Location: Sarnia, Ont. Canada

Re: Another Australian T39 build. Building more...

#59 Post by Tom Smit »

Looking forward to a few photos of the finished project. :)
TomS

Grant Bunter
Posts: 6915
Joined: Mon Nov 28, 2011 11:12 am
Location: Ilfracombe Queensland Australia
Contact:

Another Australian build. T39; 4 x 20", 2 x 28" completed

#60 Post by Grant Bunter »

Updated with fresh pics, removed image hosting with Photobucket wherever possible.
Just realised I never got around to pics of the 28" wide cabs, will fix that sometime...
Built:
DR 250: x 2 melded array, 2x CD horn, March 2012 plans.
T39's: 4 x 20" KL3010LF , 2 x 28" 3012LF.
WH8: x 6 with melded array wired series/parallel.
Bunter's Audio and Lighting "like"s would be most appreciated...

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