Joe's Omni 15 Tallboy

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jdmrivera
Posts: 73
Joined: Sat Mar 04, 2017 12:59 am
Location: Littleton, Colorado

Re: Joe's Omni 15 Tallboy

#16 Post by jdmrivera »

Bruce Weldy wrote:Keep your fingers away from the blade? :mrgreen:
I hear you. Been woodworking a long time and never cut myself on the table saw or router table cause they scare me and I'm extra careful. Have nicked myself on the bandsaw a couple times being careless.
Built:
Omni Tallboy 15 w/3015LF (My BBQ music Machine!)
2 Lab 12 T39s 24" Wide
4 OT12s, 2 Melded Array, 2 Flat Array

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

Re: Joe's Omni 15 Tallboy

#17 Post by Bruce Weldy »

jdmrivera wrote:
Bruce Weldy wrote:Keep your fingers away from the blade? :mrgreen:
I hear you. Been woodworking a long time and never cut myself on the table saw or router table cause they scare me and I'm extra careful. Have nicked myself on the bandsaw a couple times being careless.
I built myself a really good push stick a few years back.....well worth the time and effort.

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."

jdmrivera
Posts: 73
Joined: Sat Mar 04, 2017 12:59 am
Location: Littleton, Colorado

Re: Joe's Omni 15 Tallboy

#18 Post by jdmrivera »

Well I didn't work on the mid horn tonight - I'll buy one of those fancy digital angle gauges to use on my table saw tomorrow before I tackle the horn. Instead, I decided to cut 2" and 1" strips and glue them up for the back flanges.

Good thing I have a bunch of spring clamps from my flute making hobby:
20170314_202242.jpg
I also attached the outside baffle brace.

While working, I discovered part of one of my glue joints failed. In this picture, the smeared glue is where I tried to squeeze glue into the joint. I'll probably just use screws to hold this joint and seal it well from the inside unless somebody has better advice.
20170314_210414.jpg
Unfortunately I'm working too many hours at the day job that pays the bills so I have precious time in the evenings. Last two nights as soon as I got home the overalls went on and I headed to the garage. My wife thinks I'm loco especially when she checks the bank account . :cussing: Looking forward to the weekend.
Built:
Omni Tallboy 15 w/3015LF (My BBQ music Machine!)
2 Lab 12 T39s 24" Wide
4 OT12s, 2 Melded Array, 2 Flat Array

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

Re: Joe's Omni 15 Tallboy

#19 Post by Tom Smit »

jdmrivera wrote: While working, I discovered part of one of my glue joints failed. In this picture, the smeared glue is where I tried to squeeze glue into the joint. I'll probably just use screws to hold this joint and seal it well from the inside unless somebody has better advice.
Are you using PL Premium??? That stuff shouldn't fail. You can use screws for clamping power, and once the PL has cured, you can remove the screws.
TomS

jdmrivera
Posts: 73
Joined: Sat Mar 04, 2017 12:59 am
Location: Littleton, Colorado

Re: Joe's Omni 15 Tallboy

#20 Post by jdmrivera »

Tom Smit wrote: Are you using PL Premium??? That stuff shouldn't fail. You can use screws for clamping power, and once the PL has cured, you can remove the screws.
Yes - I'm using PL premium (same stuff called for in plans). Only thing I can think of is maybe joint was not clean or maybe I applied to much clamp pressure and squeezed out too much glue.
Built:
Omni Tallboy 15 w/3015LF (My BBQ music Machine!)
2 Lab 12 T39s 24" Wide
4 OT12s, 2 Melded Array, 2 Flat Array

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Bill Fitzmaurice
Site Admin
Posts: 28619
Joined: Tue May 02, 2006 5:59 pm

Re: Joe's Omni 15 Tallboy

#21 Post by Bill Fitzmaurice »

Temperature and humidity are critical with PL. At least 60 degrees, and in dry climates spritz the joints with water.

jdmrivera
Posts: 73
Joined: Sat Mar 04, 2017 12:59 am
Location: Littleton, Colorado

Re: Joe's Omni 15 Tallboy

#22 Post by jdmrivera »

Bill Fitzmaurice wrote:Temperature and humidity are critical with PL. At least 60 degrees, and in dry climates spritz the joints with water.
Could be the problem. Temp was around 50-55 when I was working over the weekend. Always dry here in Colorado. Hopefully I don't have other failures :cry: .
Built:
Omni Tallboy 15 w/3015LF (My BBQ music Machine!)
2 Lab 12 T39s 24" Wide
4 OT12s, 2 Melded Array, 2 Flat Array

jdmrivera
Posts: 73
Joined: Sat Mar 04, 2017 12:59 am
Location: Littleton, Colorado

Re: Joe's Omni 15 Tallboy

#23 Post by jdmrivera »

Small amount of progress last two nights.

Small back and top installed.
20170316_213534.jpg
Built a small cross cut sled to help with horn parts.
20170316_214633.jpg
Trimmed up back flange pieces.
20170316_214717.jpg
With any luck I can get the horn built tomorrow. Hopefully sneak out of work early :D
Built:
Omni Tallboy 15 w/3015LF (My BBQ music Machine!)
2 Lab 12 T39s 24" Wide
4 OT12s, 2 Melded Array, 2 Flat Array

jdmrivera
Posts: 73
Joined: Sat Mar 04, 2017 12:59 am
Location: Littleton, Colorado

Re: Joe's Omni 15 Tallboy

#24 Post by jdmrivera »

Didn't make it out of work as early as I hoped but did buy a cheap harbor freight brad nailer on the way home and all I can say is "where have you been all my life?" If you don't have one, get one! It was perfect for holding parts while cutting all the horn pieces - I made enough parts to build two horns anticipating I'll build another one of these cabs later.

I got excited and rushed ahead of the plans and installed the back flanges, holding everything in place with 1 1/4" brads. Verified the 15" woofer will fit through the flanges.
Tomorrow I'll install the horn and tweeter and internal bracing. Was gonna work later tonight but the bottle of bourbon in the house was calling my name :loler:

More pictures tomorrow.
Built:
Omni Tallboy 15 w/3015LF (My BBQ music Machine!)
2 Lab 12 T39s 24" Wide
4 OT12s, 2 Melded Array, 2 Flat Array

detroitrockphily
Posts: 38
Joined: Tue Aug 31, 2010 5:19 pm
Location: Louisville, Ky
Contact:

Re: Joe's Omni 15 Tallboy

#25 Post by detroitrockphily »

jdmrivera wrote:Started on my Tallboy this weekend.

For anybody else near Denver Colorado, I found Baltic Birch at Consolidated hardwoods for a decent price. 1/2 inch 5x5 was $45 a sheet.

Here's the basic cab shell:
20170312_124140.jpg
Baffle cut was made with a jigsaw (very slowly):
20170312_155736.jpg
Baffle installed:
20170312_185103.jpg
Everything is screwed and glued which helps assembly proceed without waiting for glue to dry. I'll most likely pull the screws when finished and fill with bondo before sanding everything.

When sitting on it's base there is a very minor wobble (bottom is not totally flat) I haven't decided if I should try to force it out using bar clamps or just make up for it when I install the feet. It's only about 1/8" off but it bugs me.
Is there an update? My OT15TB plans called for a square opening in the baffle...

detroitrockphily
Posts: 38
Joined: Tue Aug 31, 2010 5:19 pm
Location: Louisville, Ky
Contact:

Re: Joe's Omni 15 Tallboy

#26 Post by detroitrockphily »

jdmrivera wrote:Started on my Tallboy this weekend.

For anybody else near Denver Colorado, I found Baltic Birch at Consolidated hardwoods for a decent price. 1/2 inch 5x5 was $45 a sheet.

Here's the basic cab shell:
20170312_124140.jpg
Baffle cut was made with a jigsaw (very slowly):
20170312_155736.jpg
Baffle installed:
20170312_185103.jpg
Everything is screwed and glued which helps assembly proceed without waiting for glue to dry. I'll most likely pull the screws when finished and fill with bondo before sanding everything.

When sitting on it's base there is a very minor wobble (bottom is not totally flat) I haven't decided if I should try to force it out using bar clamps or just make up for it when I install the feet. It's only about 1/8" off but it bugs me.
Not bursting anyone's bubble on cost of BB here, I found a wholesaler in Lou "DSI" cost for 5X5 1/2" sheet is $16.55 no min order.

NukePooch
Posts: 371
Joined: Mon Jun 30, 2014 8:07 pm
Location: Berea, Kentucky

Re: Joe's Omni 15 Tallboy

#27 Post by NukePooch »

detroitrockphily wrote: Not bursting anyone's bubble on cost of BB here, I found a wholesaler in Lou "DSI" cost for 5X5 1/2" sheet is $16.55 no min order.
Oh, wow...Just a couple weeks back I drove 10+ miles past that to buy 12 sheets of Arauco @ Menards... Sheesh. :wall:
Built:
4 Jack 112L- 3012HO, melded array
17.5 wide AutoTuba with Infinity 860w
6 Wedgehorn W6 w/ Panel Mount Piezos
2 T48 Slims (15" wide) with 3012LF
4 T48 Fattys (32" wide) with 3015LF

jdmrivera
Posts: 73
Joined: Sat Mar 04, 2017 12:59 am
Location: Littleton, Colorado

Re: Joe's Omni 15 Tallboy

#28 Post by jdmrivera »

detroitrockphily wrote: Is there an update? My OT15TB plans called for a square opening in the baffle...
There is a square opening for the baffle on the midrange driver. It's round for the large woofer.
Built:
Omni Tallboy 15 w/3015LF (My BBQ music Machine!)
2 Lab 12 T39s 24" Wide
4 OT12s, 2 Melded Array, 2 Flat Array

jdmrivera
Posts: 73
Joined: Sat Mar 04, 2017 12:59 am
Location: Littleton, Colorado

Re: Joe's Omni 15 Tallboy

#29 Post by jdmrivera »

Measure twice cut once!!
Good new is I cut out two sets of midrange horn pieces and successfully built one of them. Bad news is I then proceeded to trim it to 10" long instead of 11" :cussing:
Need a few minutes to de-compress then go build the other one. :bash:
Built:
Omni Tallboy 15 w/3015LF (My BBQ music Machine!)
2 Lab 12 T39s 24" Wide
4 OT12s, 2 Melded Array, 2 Flat Array

jdmrivera
Posts: 73
Joined: Sat Mar 04, 2017 12:59 am
Location: Littleton, Colorado

Re: Joe's Omni 15 Tallboy

#30 Post by jdmrivera »

Take two:

Second horn glued up. Will trim tomorrow...........
20170319_184451.jpg
I drew lines on both sides of the top and bottom pieces to use as a guides when shooting the brads.
Built:
Omni Tallboy 15 w/3015LF (My BBQ music Machine!)
2 Lab 12 T39s 24" Wide
4 OT12s, 2 Melded Array, 2 Flat Array

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