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Topic: SO Radar Antenna Housing |
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David Waples
TOP BOSS
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Posted on: Jul 14, 2020 - 8:29pm
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Thats was 2012? Aye carumba! Where has the time gone?
David Waples |
Total Posts: 1679 | Joined:
Jan 2, 2007 - 9:55pm | IP
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Stearman
Advanced Member
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Posted on: Jul 15, 2020 - 8:31pm
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Reminds me how sad it is, that Photo Bucket destroyed a big chunk of the internet!
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Total Posts: 150 | Joined:
Nov 1, 2017 - 9:38pm | IP
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Jeff D
Moderator
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Posted on: Jul 16, 2020 - 6:42am
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Yes they did, and without much warning if I remember right.
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Total Posts: 2200 | Joined:
Dec 21, 2006 - 1:30am | IP
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pbudzik
New Member
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Posted on: Aug 18, 2020 - 5:48am
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Thanks again to everyone for your help. Here is what I finally came up with.
Paul
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Total Posts: 17 | Joined:
Apr 20, 2020 - 11:02am | IP
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Jeff D
Moderator
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Posted on: Aug 19, 2020 - 5:07am
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Looks good Paul.
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Total Posts: 2200 | Joined:
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Jeff D
Moderator
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Posted on: Sep 14, 2020 - 3:45am
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Nicely done video Paul, and thanks for the shout out to the forum and my website!
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Total Posts: 2200 | Joined:
Dec 21, 2006 - 1:30am | IP
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Jerry Gilmartin |
TOP BOSS
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Posted on: Sep 14, 2020 - 9:10pm
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Wow Paul! I was glad to see you took the photos I posted of the PT658 Radar mast and made such an awesome replica of it! Just FYI, this authentic radar mast was obtained on loan from the PT Boat Museum in Fall River, Mass. We believe it had been mounted on an Elco 80footer before we obtained it, due to the shape and configuration of the Mounting Brackets. Apparently the mast on an Elco would hinge down at an angle (off center) and not lay back flat like on a Higgins boat. When we mounted the mast, we had to reposition the hinge pins inside of the foot brackets so it would lay back flat. You can see these brackets have a lot of different holes in them so it may have been by design? One small detail that you may or may not want to change is the two small yardarms. On our actual mast they are attached to the outside of the mast legs with a quaint little triangular plate. This plate is screwed to the surface of the legs and holds the yardarm perpendicular to its surface. The overall effect is they are slightly tilted (or swept) upwards from the horizontal plane. I realize this is really getting nitpicky here! So to simulate this you may want to bend the yardarms upwards just a hair, so they are perpendicular to the outer surface of the leg. Also, another slight misnomer is the big box on the base is not really called a rectifier. It is properly termed the Signal Generator. It consists of a great big transformer inside and some capacitors and rectifiers, and basically creates a large pulse of RF energy. This RF is directed up to the Antenna through the hollow 2x4 shaped wave guide. It is very similar to a rain gutter downspout, except it in real life is a hollow rectangular steel tube. Anyway that is what the RF Signal Generator does. (The Radar set does indeed have a Rectifier, but it is part of the power supply and is located down below deck.) I am really amazed by your extraordinary skills and am happy to have been able to be of assistance in some small way to your masterpiece!
Thanks again and keep up the amazing work!
Jerry Gilmartin USS PT658 Crewman and Restoration Volunteer.
Jerry Gilmartin
PT658 Crewman
Portland OR |
Total Posts: 1469 | Joined:
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Jeff D
Moderator
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Posted on: Sep 15, 2020 - 2:28am
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Thank you Jerry, I've never picked up on the Higgins mast folding straight back or the slight angle of the yardarms.
I hope you're not in harm's way of amy of the monstrous fires going on out there...
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Total Posts: 2200 | Joined:
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