I tried finding the sweet spot at this qth C31XR at 90 feet 2 EL xm 240 at 70 feet. Tried every 5 feet between 40 and 70 feet over a 5 day period with no luck either
73 Chet N4FX. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Pete Smith Sent: Thursday, December 15, 2011 6:30 AM To: [email protected] Subject: Re: Topband: Some Success I would try to find that sweet spot first, because if you're like me, you never will. I have stacked tribanders, a 2-el 40-meter beam and an 80 meter lazy-v array all on one tower. I modeled the thing and found where (supposedly) the 50-ohm point would be. After about 5 trips up and down the tower, without finding anything even remotely close to 50 ohms over a +/- 15 foot range, I gave up and just left the omega match in place. 73, Pete N4ZR The World Contest Station Database, updated daily at www.conteststations.com The Reverse Beacon Network at http://reversebeacon.net, blog at reversebeacon.blogspot.com, spots at telnet.reversebeacon.net, port 7000 AND now at arcluster.reversebeacon.net port 7000 On 12/14/2011 5:26 PM, Bob Garrett wrote: > Hello Topbanders, > > > > Thanks to everyone who responded to my query for help regarding my shunt fed > tower. I did configure an Omega match. I do notice that the BW is much > narrower using the Omega match compared to the single series capacitor. > Once I get all the to antenna work completed, I will probably look for the > "sweet spot" again and use only the series cap. Until then, the Omega match > certainly seems to work. I'm also considering changing out the piece of > RG8X that I use for the shunt arm and replacing it with a 3 or 4 wire cage. > Any suggestions on spacers to use for configuring the cage? > > > > Have a great Holiday and once again, thanks for the collective wisdom. > > > > 73, Bob K3UL > > > > _______________________________________________ > UR RST IS ... ... ..9 QSB QSB - hw? BK > > _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
