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#1
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Before I started on my present project I looked at the IR antenna
allband Wow I couldnt believe the price and why are hams not building it themselves. You know you could buy telescopic fishing poles and stick aluminum foil along its outside length and at particular points take off some foil and push some finger stock into the inner of the pole It is then an easy job to switch these gaps closed or open depending on the band you are using. If you are not using high power just a simple tubular solenoid inside the pole will do the trick though if you are using power I would widen the gap by having a central dowel rod placed inside the pole with a aluminum tube covering at the ideal points where they can rub the finger stock to close the gap. Pushing the dowel rod is quite easy,, just take the belt and step motor off a printing machine and fix the dowel on both sides of the element to the belt and bingo you have a cheapy all band antenna for just over a $100 Buy the telescopic fishing poles on EBay and get the aluminum foil from your kitchen or buy the adhesive foil from your hardware store. ,By the way send all your money savings to me !, have fun Cheers Art |
#2
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Brilliant! Why didn't I think aboutit?
Can you picture stupid hams paying crazy money for bunch of fiberglass fishing poles, some metal tape and stepping motors with controller that could be replaced by the strings. I was going to put up 6 stepIR, now I will save hugh money. Where do I send the money? bada BUm "art" wrote in message ups.com... Before I started on my present project I looked at the IR antenna allband Wow I couldnt believe the price and why are hams not building it themselves. You know you could buy telescopic fishing poles and stick aluminum foil along its outside length and at particular points take off some foil and push some finger stock into the inner of the pole It is then an easy job to switch these gaps closed or open depending on the band you are using. If you are not using high power just a simple tubular solenoid inside the pole will do the trick though if you are using power I would widen the gap by having a central dowel rod placed inside the pole with a aluminum tube covering at the ideal points where they can rub the finger stock to close the gap. Pushing the dowel rod is quite easy,, just take the belt and step motor off a printing machine and fix the dowel on both sides of the element to the belt and bingo you have a cheapy all band antenna for just over a $100 Buy the telescopic fishing poles on EBay and get the aluminum foil from your kitchen or buy the adhesive foil from your hardware store. ,By the way send all your money savings to me !, have fun Cheers Art |
#3
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I always looked at the SteppIR's and thought they were pretty much
exactly worth the money. By the time you worked up your own SteppIR-like control system and actually got the sliding contacts to work in a low loss, reliable fashion, you'd easily be up to the price of those antennas. Dan |
#4
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Don't really need a control box, apply the frequency as you turn the
motor and stop when the SWR meter takes a dive. YThink positive wrote: I always looked at the SteppIR's and thought they were pretty much exactly worth the money. By the time you worked up your own SteppIR-like control system and actually got the sliding contacts to work in a low loss, reliable fashion, you'd easily be up to the price of those antennas. Dan |
#5
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I've done something similar but simpler.
I took two 20' Bream poles & mounted them on a 1"x 2"x 8' with clamps. I left a 4' gap between the ends of the poles. Total extended length = 44'. I then strung #16 wire along the outside of the entire length, feed it with ladder line thru a tuner & mounted it on a 30' tower. Walla, a rotatable dipole for 40 meters thru 6 meters (75 meters is a push but it loads). It has gain & directivity on 20 - 6. Total cost - less then $40 Terry W8EJO |
#6
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Art displays his "out of the box genius" again.
Describing his "cheap" version of StepIR antenna is like comparing wheelbarrow to Mack truck. Sure is cheaper and "simpler" and you can transport one brick with both, but when it comes to loading serious load, the difference is obvious even to bl?*&% idiot. :-) Can you get that or is too complicated that it would need explanation with polarized bubbles? bada BUm "art" wrote in message oups.com... Don't really need a control box, apply the frequency as you turn the motor and stop when the SWR meter takes a dive. YThink positive wrote: I always looked at the SteppIR's and thought they were pretty much exactly worth the money. By the time you worked up your own SteppIR-like control system and actually got the sliding contacts to work in a low loss, reliable fashion, you'd easily be up to the price of those antennas. Dan |
#7
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Why are you being so abusive?
Yuri Blanarovich wrote: Art displays his "out of the box genius" again. Describing his "cheap" version of StepIR antenna is like comparing wheelbarrow to Mack truck. Sure is cheaper and "simpler" and you can transport one brick with both, but when it comes to loading serious load, the difference is obvious even to bl?*&% idiot. :-) Can you get that or is too complicated that it would need explanation with polarized bubbles? bada BUm "art" wrote in message oups.com... Don't really need a control box, apply the frequency as you turn the motor and stop when the SWR meter takes a dive. YThink positive wrote: I always looked at the SteppIR's and thought they were pretty much exactly worth the money. By the time you worked up your own SteppIR-like control system and actually got the sliding contacts to work in a low loss, reliable fashion, you'd easily be up to the price of those antennas. Dan |
#8
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ORIGINAL MESSAGE:
On 5 Dec 2006 18:59:59 -0800, "art" wrote: Before I started on my present project I looked at the IR antenna allband Wow I couldnt believe the price and why are hams not building it themselves. You know you could buy telescopic fishing poles and stick aluminum foil along its outside length and at particular points take off some foil and push some finger stock into the inner of the pole It is then an easy job to switch these gaps closed or open depending on the band you are using. ------------ REPLY FOLLOWS ------------ This has to be a troll. Nobody in their right mind would ever build such a kludge. Bill, W6WRT |
#9
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Bill Turner wrote:
This has to be a troll. Nobody in their right mind would ever build such a kludge. Bill, W6WRT Bill: I can tell, you never seen my "Beer Can Antenna." (made with REAL beer cans!--they were steel back then.) Seemed to work best the first day I built it, and had to empty the cans ... Regards, JS |
#10
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art" wrote in message
ps.com... Why are you being so abusive? Steppir Fanboy They consider everyone who doesn't pay the exorbitant prices of the steppirs NON-HAMS. |