DIY Choke Ring Antennas?

With all the talk about choke rings, and having spent all my pennies elsewhere, I looked around to see if there were any do-it-yourself versions. I found this one: "http://www.mauve.gr/var/DIY_Choke_Ring_GPS_Antenna.htm". Is it worth the effort, other than as an experiment? Are there any other homebrew versions out there that anyone has tried? Granted, I have no real complaints about the amplified patch I have sitting on my HP stack which is right under a massive central air system, but it sounds like a project after my PLL is finished and my Rb standard is boxed up nicely.

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Smart Meter Specs | PDF | Physical Quantities | Electricity
What to Know About Quartz Crystal Oscillator CatalogThe JPL'ers are fond of the Helibowl.. A helix wound on a plastic cup,
mounted in a inexpensive mixing bowl, or those things you put under the
elements/burner in a stove. I've asked several times about specific
dimensions and they're always sort of vague: I think it depends on the
specific model of plastic cup and mixing bowl available at the local
discount store when they make the antenna.

If you look up the dimensions of the choke rings, you'll see there's a
fair amount of variability, so the "nested straight sided cake pan" is
probably not a bad strategy, as well.

The JPL'ers are fond of the Helibowl.. A helix wound on a plastic cup,mounted in a inexpensive mixing bowl, or those things you put under theelements/burner in a stove. I've asked several times about specificdimensions and they're always sort of vague: I think it depends on thespecific model of plastic cup and mixing bowl available at the localdiscount store when they make the antenna.If you look up the dimensions of the choke rings, you'll see there's afair amount of variability, so the "nested straight sided cake pan" isprobably not a bad strategy, as well.

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