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#1
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My Quad is all built and I'm waiting or FedEx to deliver
my rotor. I built the quad out of wood, with a 1-1/4" dia pine boom and 4' mast plus 1/4"x48" spruce dowels for spreaders. I used insulated 16g stranded wire for the elements. All the wood is either painted or treated with sealer. Problem is I just broke a spreader moving the antenna and I'm worried about how fragile the whole design is. Would the performance change much if I used 1/4" aluminum rods instead? Maybe I should just get some fiberglass resin and paint the spreaders with several coats? How about wrapping them in re-enforced boxers tape (the good stuff with fibers in the tape)? Thanks for the help, guys.... -- 73's de Ken KG0WX - Kadiddlehopper #11808, Flying Pigs #-1055, Grid EM17io, FT-857D, AL-84, Elecraft XG2, 4SQRP Tenna Dipper, Heath GD-1B |
#2
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![]() Ken Bessler wrote: My Quad is all built and I'm waiting or FedEx to deliver my rotor. I built the quad out of wood, with a 1-1/4" dia pine boom and 4' mast plus 1/4"x48" spruce dowels for spreaders. I used insulated 16g stranded wire for the elements. All the wood is either painted or treated with sealer. Problem is I just broke a spreader moving the antenna and I'm worried about how fragile the whole design is. Would the performance change much if I used 1/4" aluminum rods instead? Maybe I should just get some fiberglass resin and paint the spreaders with several coats? How about wrapping them in re-enforced boxers tape (the good stuff with fibers in the tape)? Thanks for the help, guys.... -- 73's de Ken KG0WX - Kadiddlehopper #11808, Flying Pigs #-1055, Grid EM17io, FT-857D, AL-84, Elecraft XG2, 4SQRP Tenna Dipper, Heath GD-1B Dunno...1/4 inch dowels sound kind of thin.. I don't know about metal spreaders. I've never tried it. Might work ok, as long as they were not a resonant length, or overly coupling to the loop wires. The resin probably would help stiffen them up a bit. "wood" Might help, as long as the dowels don't flex enough to shatter the glass coating, and cause it to crack away. These problems are a large reason why I don't mess with quads much. Lots more work, and design considerations with a 3d object vs a 2d like a yagi. So being the lazy ******* I basically am, I use almost all yagi's vs quads. So much easier to deal with, being most of my yagi's are basically one piece with the elements grounded to the boom. Not much to break or go wrong, unless something falls on it... :/ On 6m, I use a 3 el yagi , made completely of copper tubing. It's all one piece, plumbers delight , with the elements brazed directly to a copper boom. Even the gamma match tube is 3/8 copper tube. MK |
#3
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![]() "Ken Bessler" wrote in message news:jXDhg.37830$4H.24271@dukeread03... My Quad is all built and I'm waiting or FedEx to deliver my rotor. I built the quad out of wood, with a 1-1/4" dia pine boom and 4' mast plus 1/4"x48" spruce dowels for spreaders. I used insulated 16g stranded wire for the elements. All the wood is either painted or treated with sealer. Problem is I just broke a spreader moving the antenna and I'm worried about how fragile the whole design is. Would the performance change much if I used 1/4" aluminum rods instead? Maybe I should just get some fiberglass resin and paint the spreaders with several coats? How about wrapping them in re-enforced boxers tape (the good stuff with fibers in the tape)? Thanks for the help, guys.... -- 73's de Ken KG0WX - Kadiddlehopper #11808, Flying Pigs #-1055, Grid EM17io, FT-857D, AL-84, Elecraft XG2, 4SQRP Tenna Dipper, Heath GD-1B I found 1/4 inch fiberglass a little flimsy for a 6 meter quad but workable, 3/8ths was much better. next time I build one it will probably be 1/2 inch fiberglass. |
#4
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![]() "Jimmie D" wrote in message ... "Ken Bessler" wrote in message news:jXDhg.37830$4H.24271@dukeread03... My Quad is all built and I'm waiting or FedEx to deliver my rotor. I built the quad out of wood, with a 1-1/4" dia pine boom and 4' mast plus 1/4"x48" spruce dowels for spreaders. I used insulated 16g stranded wire for the elements. All the wood is either painted or treated with sealer. Problem is I just broke a spreader moving the antenna and I'm worried about how fragile the whole design is. Would the performance change much if I used 1/4" aluminum rods instead? Maybe I should just get some fiberglass resin and paint the spreaders with several coats? How about wrapping them in re-enforced boxers tape (the good stuff with fibers in the tape)? Thanks for the help, guys.... -- 73's de Ken KG0WX - Kadiddlehopper #11808, Flying Pigs #-1055, Grid EM17io, FT-857D, AL-84, Elecraft XG2, 4SQRP Tenna Dipper, Heath GD-1B I found 1/4 inch fiberglass a little flimsy for a 6 meter quad but workable, 3/8ths was much better. next time I build one it will probably be 1/2 inch fiberglass. Be careful when working with fiberglass - after a while it tends to flake and you could get the fiberglass in your hands, etc. - wear gloves. 73's Howard W3CQH |
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