Be aware, Googling "helibowl" at work may take you to websites selling glassware used for "recreational purpose"s that may not be appreciated by the IT police ;-) Robert G8RPI.
________________________________ From: Jim Lux <[email protected]> To: [email protected] Sent: Tuesday, 17 September 2013, 5:31 Subject: Re: [time-nuts] DIY Choke Ring Antennas? On 9/16/13 6:51 PM, Bob Stewart wrote: > 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. > 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 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. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
