>From what Ive read elsewhere their target market is often the cave dweller surrounded by 100+ other units making electronic noise and the poor owner is trying to hear something on his $59 allband Chinese toy.
Carl KM1H ----- Original Message ----- From: "W2PM" <[email protected]> To: <[email protected]> Cc: "Top Band" <[email protected]> Sent: Wednesday, April 11, 2012 3:24 PM Subject: Re: Topband: Wellbrook receive loop performance > BCB work would be good for the Wellbrook and I suspect that is their > target market. > > Sent from my iPad > > On Apr 11, 2012, at 9:14, joe <[email protected]> wrote: > >> I made some signal to noise measurements last night between my short BOG >> and LOOP. Local (100-300 miles away) cw signals. The Loop, which is >> still living in my basement, is within 3DB of the BOG. I will move it >> outside soon and see what happens to SNR. I still need to try it out on >> some weaker DX stations. >> >> The LOOP has also proved to be promising on hearing multiple AM >> broadcast stations on the same frequency due to its good nulling >> capability. I could never do this with the BOG or L. >> >> >> On Tue, 2012-04-10 at 11:04 -0400, joe wrote: >>> I built it in one evening using two pieces of scrap 1x3 lumber for >>> spreaders. I pounded in four large wire staples to hold the wire to the >>> spreaders and threaded both loops through them. The five wire and one >>> wire pickup loop are not separated. I used a variable cap of roughly >>> 150-200PF to resonate the 5 wire loop. I fed the pickup loop directly >>> with RG-58 coax. No matching transformer. The loop is roughly 32 inches >>> square. I tune the cap for maximum noise for the desired frequency. >>> The loop is tunable from about 1600 - 1850 KHZ. >>> >>> I modeled my loop after the following designs for unshielded loops. >>> >>> http://www.i1wqrlinkradio.com/antype/ch9/chiave1183.htm >>> >>> http://members.verizon.net/~vze24qhw/loop.html >>> >>> >>> On Tue, 2012-04-10 at 08:49 -0400, joe wrote: >>>> I am experimenting with a small one meter square loop. It is 5 turns >>>> of >>>> #14 wire with a one turn pickup loop. Feeding the pickup loop directly >>>> with 50 ohm coax. Using air variable cap to resonate the 5 turn loop. >>>> I have it setup in my basement on a tripod with small TV rotator and it >>>> works amazingly well. I can null stations about 3-4 S units with it >>>> and >>>> it is about 4 S units (24 DB) quieter than my inverted L. I also have >>>> a >>>> short 140 foot BOG and the loop performs nearly the same with the added >>>> ability null out noise sources. I plan to move it outside and take >>>> some >>>> more measurements. I'm pretty impressed so far. -Joe KB3KJS >>>> >>>> >>>> >>>> >>>> On Mon, 2012-04-09 at 17:17 -0700, Jim WA9YSD wrote: >>>>> How well does this antenna perform in a City environment like mine on >>>>> top of a 50 foot tower? >>>>> >>>>> Stay on course, fight a good fight, and keep the faith. Jim >>>>> K9TF/WA9YSD >>>>> _______________________________________________ >>>>> UR RST IS ... ... ..9 QSB QSB - hw? BK >>>> >>>> >>>> _______________________________________________ >>>> UR RST IS ... ... ..9 QSB QSB - hw? BK >>> >>> >>> _______________________________________________ >>> UR RST IS ... ... ..9 QSB QSB - hw? BK >> >> >> _______________________________________________ >> UR RST IS ... ... ..9 QSB QSB - hw? BK > _______________________________________________ > UR RST IS ... ... ..9 QSB QSB - hw? BK > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 10.0.1424 / Virus Database: 2411/4928 - Release Date: 04/11/12 > _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
