[TowerTalk] Stepper Antennas and Shunt Feed Towers
ersmar at comcast.net
ersmar at comcast.net
Thu Feb 1 09:03:44 EST 2007
Most sources I've read regarding shunt-fed towers recommend a wider, rather than closer, spacing of the shunt wire from the tower. Keeping your wire away from the tower then threading between the TIC ring and tower might work, but you won't know for certain until you try it.
As an alternative, maybe you could tap the tower BELOW the lowest TIC ring and try the feed. You might need an omega match to give you a good match to coax, but it eliminates the need to involve the TIC rings at all.
Gene Smar AD3F
-------------- Original message ----------------------
From: "Dick Green WC1M" <wc1m at msn.com>
> I have a related question: How close to the tower can the shunt wire be?
> I'm putting up a 3-stack of 4-el SteppIRs on TIC rings (the top one is up
> already.) A shunt feed wire would have to be threaded through the TIC rings,
> giving it only a few inches of clearance from the tower and ring. Assuming I
> can fabricate standoffs that will keep the wire from touching any metal
> parts, will the proximity of the wire to the tower and/or ring cause
> problems? One person suggested spacing the wire further from the tower
> between rings, then looping in to thread through each ring. Any reason to do
> Perhaps I should consider a different type of antenna for 160m?
> 73, Dick WC1M
> > -----Original Message-----
> > From: Howard Klein [mailto:howk2 at hotmail.com]
> > Sent: Wednesday, January 31, 2007 7:14 PM
> > To: w4to at charter.net
> > Cc: TowerTalk at contesting.com
> > Subject: Re: [TowerTalk] Stepper Antennas and Shunt Feed Towers
> > Subject: [TowerTalk] Stepper Antennas and Shunt Feed Towers
> > Date: Wed, 31 Jan 2007 16:13:46 -0500
> > Has anyone used a stepper antennas mounted on a shunt feed
> > tower? What kind of experiences have you had?
> > 73...Don...W4TO
> > __Don,
> > I have had good results with a two stack of 4 element
> > SteppIR's. I find I do best when all el's are retracted. No
> > arcing noted.
> > 73,
> > Howard..K2HK
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