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Moonraker 4 Hubs

S

sparkplug549

Guest
Anyone out there ever heard of someone replacing the original hubs that hold the elements to something different. That was the only problem with the moonraker. I know u can buy replacement hubs but they can crack so easy and once it does it is over. I would like to put my old moonraker back up on the tower but thought I would try to find a better solution for the hubs. I have a couple that are broke. Any solutions?

Thanks in advance Sparkplug549


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hello Jay, link no-workie<img src=http://www.ezboard.com/intl/aenglish/images/emoticons/happy.gif ALT=":D">





73

Jeff


CDX 339

RadioActive

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Hello Sparkplug549:



The Moonraker Hubs where a cheaply made Cast Aluminum, that even broke when tightening when brand new ones out of the box. I know I broke a bunch of them while trying to be careful while tightening them or compressing them down on the Boom.



New Hubs could be made on a CNC type Mill, but you would have to pay for set up time, material, and labor. The cost of all this could possibility be recovered if more hubs where made and sold.



New Technologies in the Casting World, can add certain addatives that will allow the aluminum to be significantly more resilient allowing the Hubs to be compressed and not break. But the tooling cost will be around $1500.oo dollars.



I have had Hubs made, but for a stronger larger Boom diameter of 2 inches. The Moonraker 4 Hubs are for 1 5/8 and the Moonraker 6 Hubs are 1 3/4 inch Boom Diameter.



These Hubs are made from solid or billet 6061-T6 Aluminum Material, and use a 3/8 SAE type bolt to compress against the Boom. And have been tested to be almost fully closed, and then opened many times over and do not have the breaking problem as do the Moonraker Cast Aluminum Hubs.



If you replaced the Moonraker Boom and Hubs, you would have a bullet proof upgrade there. But the cost may out weight the cost of a new antenna.



Here is the link to my hubs



www.a1antennas.com/r&d2.html



These Hubs where made for the "Typhoon" type Beam Antenna that uses a quad reflector and driven element, and yagi type directors. That is still being designed and built.



Jay in the Mojave



www.a1antennas.com


</p>Edited by: <A HREF=http://p067.ezboard.com/bworldwidecbradioclub.showUserPublicProfile?gid=moleculocdx363>MoleculoCDX363</A> at: 9/4/04 11:35 am
 
Hello Jay:

<blockquote>Quote:<hr>What are those two tubes there doing?<hr></blockquote>



Legal Limit <img src=http://www.ezboard.com/intl/aenglish/images/emoticons/wink.gif ALT=";)">



"Life is too short for QRP"



How`s life down the road from the gas station?

and HEY!

When are you gonna send me a I-10K mobile antenna to test???

<img src=http://users.joplin.com/dutch64804/posticon24.gif ALT=":lmao">









73

Jeff


CDX 339

RadioActive

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pa1k.jpg
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Hello Jeff:



What do do have in mind testing the mobile antenna????



I have one left, it has no coils, and is almost a full 1/4 wavelength long, and can be adjusted longer if needed.



I don't think this would be a drive around antenna tho. You may take out the local cable TV, and drag it down the road, not good.



It uses a Capacitance Hat, and a Hairpin to match it to 1.0 to 1 SWR. I had to install a heavier Top Hat pieces to that they wouldn't burn off, some people!...........



What would you install it on? I am putting a station together for a guy who is real picky about all the stuff we are getting, and he lives pretty close to you. I didn't want this job but he is paying my price so I can't complain. And he is becoming a good friend. They ask me to use the rear entrance and whip my feet before I come in the house. Most folks have me wait at the back door tho.



I might just bring it to ya;s all. It will need a significant mount, but I can make one.



Jay in the Mojave



www.a1antennas.com


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What do do have in mind testing the mobile antenna????



Screw it on the back of my old Thunderbird and use the heck out of it. Could check bandwidth,reflect Etc. I don`t think I can even come close to melting the top hat off though...have to save that one for Bobby (have to get him to drag one of his 3cx10000a`s out of the closet) , not sure about the mount tho..I am running a 1/4 wave fiberglass right now on the trunk. I am using a HD teardrop type mount/w a hustler stainless QD...i think it is at the limit by the way the metal flex`s on the trunk lid now.

Of course everything looks better after you drink a few beers, might not be a problem at all (hehehe) I can only wind-load test it to 85MPH, spedio won`t go any higher than that, unless you put it on that kph thing, and then you can really go fast LOL!

We could at least have lunch somewere! Let me know when you will be around.



73

Jeff


CDX 339

RadioActive

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Hello Jonbah:



Good post there. The MaCo U-Bolts uses 1 1/2" and 2" and 3" inch U-Bolts and clamps. be advised. I would use the 2" inch U-Bolts and clamps.



The Moonraker Boom uses 1 5/8 diameter Boom that the Hubs or clamps will have to bolt on to, so the 1 1/2" inch U-Bolts will be too small. New lengths of 5/8" OD (outside diameter) Aluminum tubing will have to be found. I suggest you use 6061 T6 or 6063 T8, aluminum tubing, with a .058" inch wall thickness.



You need to figure out the new 5/8 length that will fit into the new clamps.



Jay in the Mojave



www.a1antennas.com


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