New Jack 112 build

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Bruce Weldy
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Re: New Jack 112 build

#16 Post by Bruce Weldy »

"I love the smell of BB in the morning..."

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"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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Rickyvt
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Re: New Jack 112 build

#17 Post by Rickyvt »

I got some black cab paint from Blue Aran, but I'm in doubt, they also sell transparent paint... That might look very nice. Do you need a special spray gun or will the usual stuff suffice? I painted my Tallboy with a paint roller but would like to try a spray gun to paint these Jacks...

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Rickyvt
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Re: New Jack 112 build

#18 Post by Rickyvt »

Bruce Weldy wrote: Mon Jun 15, 2020 4:42 pm "I love the smell of BB in the morning..."
My grandad was a carpenter and builded houses too. I remember his workshop which was quit large, and the lovely smell of all kinds of woods he used. A pile of wood shavings a few feet tall and some big belt driven machines that predated World War II
Great memories...

Bruce Weldy
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Re: New Jack 112 build

#19 Post by Bruce Weldy »

Rickyvt wrote: Tue Jun 16, 2020 2:46 pm
Bruce Weldy wrote: Mon Jun 15, 2020 4:42 pm "I love the smell of BB in the morning..."
My grandad was a carpenter and builded houses too. I remember his workshop which was quit large, and the lovely smell of all kinds of woods he used. A pile of wood shavings a few feet tall and some big belt driven machines that predated World War II
Great memories...
Yep, a wood shop does smell good......but, I was actually paraphrasing the line from "Apocalypse Now". :mrgreen:



image.jpg

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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Rickyvt
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Re: New Jack 112 build

#20 Post by Rickyvt »

It has been a while since I saw that film. Good soundtrack as I recall...

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Bill Fitzmaurice
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Re: New Jack 112 build

#21 Post by Bill Fitzmaurice »

Yeah, there's nothing like Wagner to get you in the mood for death and destruction. But the scene was pure bullshit. You could hear even one Huey approaching from at least five miles off, let alone a squadron. There was no such thing as surprise attacks with UH-1s.

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Rickyvt
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Re: New Jack 112 build

#22 Post by Rickyvt »

The bigger the budget the bigger the BS I’d say...

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Re: New Jack 112 build

#23 Post by Rickyvt »

Got some info on the spray gun stuff from Wagner and Tuff Cab here in Europe, got speaker grills but there's one thing missing:

Time...

Too busy after the lockdown here, so the Jacks will have to be patient...

Rich4349
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Re: New Jack 112 build

#24 Post by Rich4349 »

Bill Fitzmaurice wrote: Tue Jun 16, 2020 4:01 pm ...You could hear even one Huey approaching from at least five miles off...
ESPECIALLY if they're playing Ride of the Valkeries through compression driver DR250s through the side doors!
2 DR250s, 2 27" Lab15 T-60s, 2 30" Neo Titan 39s, 1 Autotuba...and looking for more!

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Rickyvt
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Re: New Jack 112 build

#25 Post by Rickyvt »

Funny how a brand of spray guns and a German composer come together in this thread :D

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Rickyvt
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Re: New Jack 112 build

#26 Post by Rickyvt »

Is it safe to just glue the phase plug.or do I screw it to the baffle to be sure?

Bruce Weldy
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Re: New Jack 112 build

#27 Post by Bruce Weldy »

Rickyvt wrote: Sat Jul 11, 2020 10:41 am Is it safe to just glue the phase plug.or do I screw it to the baffle to be sure?
I screwed it on just so I wouldn't have to futz with lining it up with the glue slipping all over the place. That lines it up correctly while the glues dries and you can just leave the screws in since they can be seen.

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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Rickyvt
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Re: New Jack 112 build

#28 Post by Rickyvt »

Glued three 5” discs together first, painted the sides and glued it to the baffle. I’ll use one screw in the center to be sure but I got a feeling it is not really necessary. Haven’t tried it but I think I can lift the cab by the phase plug. Speaking of which, never investigated the reason for a phase plug. It seems that a lot of (commercial) cabs don’t have one...
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Bill Fitzmaurice
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Re: New Jack 112 build

#29 Post by Bill Fitzmaurice »

Rickyvt wrote: Sun Jul 12, 2020 6:16 am It seems that a lot of (commercial) cabs don’t have one...
There's the right way to do things, and there's the cheap way. We do it the right way. :wink:

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Rickyvt
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Re: New Jack 112 build

#30 Post by Rickyvt »

I found this on Wikipedia: Woofers[edit]

Horn-loaded woofer showing a phase plug in black
Phase plugs may be placed in front of woofer cones, especially in horn-loaded loudspeaker designs. In the same fashion as compression driver phase plugs, the intent is to minimize higher-frequency wave interference near the driver. In this case, "high frequency" is relative to the intended bandpass; for example, a 12-inch (300 mm) cone woofer might be expected to reproduce 550 Hz energy near the top of its intended range, however, the wavelength of 550 Hz is approximately twice the diameter of the woofer, so wave energy at that frequency traveling laterally from one side to the other will be out of phase and will cancel. With a phase plug in the center, such lateral wave energy bounces off of the obstruction and is reflected outward toward the listener. Phase plugs for woofer cones are typically solid plugs positioned over the woofer's central dust cap, or in the center of the woofer, replacing the dust cap.[16][17]

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