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6 meter quarter wave	Reply
by N3IDG on September 22, 2008	Mail this to a friend!
hi i tried to cut a 102 inch stainless whip down for six meter i cam up with 54 inches bad match ,found another at a yard sale . I am using a L-bracket mount between fender and hood bolted on with nut and bolts.The main body ground from battery is on this fender I get good matches on 10meters and six meters with hamstick antennas; any help on a six meter quarter wave would be helpful before,.I cut this one .

RE: 6 meter quarter wave	Reply
by K5LXP on September 22, 2008	Mail this to a friend!
So where exactly does the 54" version resonate on your vehicle? The exact resonance point will depend on your grounds and counterpoise, as well as mounting location. You may also desire to use a matching stub or network depending on the feed Z at resonance. Mark K5LXP Albuquerque, NM

RE: 6 meter quarter wave	Reply
by AA4PB on September 22, 2008	Mail this to a friend!
54 inches is resonant on 52MHz. Resonance however doesn't necessarily mean 50 Ohms and a 1:1 SWR. You really need an antenna anylizer to measure R and X to determine what is going on. When X = 0 then the antenna is resonant but R can be anything. A 1/4 wave whip properly mounted will likely have an R of about 20 ohms which will give you a 2.5:1 SWR at resonance. Then you need a matching network to bring it up to 50 ohms (1:1 SWR) without affecting the resonance.

RE: 6 meter quarter wave	Reply
by W3LK on September 22, 2008	Mail this to a friend!
Just remember, the 54" is measured from the feed point, not the bottom of the whip. If you have a spring between the whip and the bracket, the length of the spring must be subtracted from the overall length. 73, Lon - W3LK Naugatuck, Connecticut

RE: 6 meter quarter wave	Reply
by K0BG on September 23, 2008	Mail this to a friend!
No one mentioned this, but I will. If you're operating FM, the vertical is fine. However, if you're operating SSB, then you want a halo which has horizontal polarization. The difference is just short of amazing. If you have local clearance, you can stack a pair of them (halos), and end up king-of-the-hill. Alan, KØBG www.k0bg.com

RE: 6 meter quarter wave	Reply
by KO1D on September 25, 2008	Mail this to a friend!
I run a simple Hustler mast on 6m. It is 54" long and works fine on FM. Alan is 100% right though for SSB. I can sit on a very high hill but due to being vertical and not horizontal it really can be a pain trying to work locals. The attenuation is a big hurdle to overcome. Dan S KO1D/3

RE: 6 meter quarter wave	Reply
by W4KVW on September 27, 2008	Mail this to a friend!
I use a 5/8 wave NMO mounted 2 meter VERTICLE on my pickup for SSB & it works GREAT & the SWR is less than 1.5.1 up to about 50.190.I did NOT recut it from where it was cut for 2 meters(146.00)I worked 6 states in my 12 mile drive home in one afternoon. Working LOCALS who are using Horizontal beams is NOT easy but when the band is open I work just as many stations as I did when running my PAR OA-50.You can work the world on 6 meters on a clothes hanger when the band is GOOD after all.I have worked as far south as Orlando(150 miles)on ground wave & Jacksonville(30 miles)while driving home on several days on a QUIET band with 100 watts from my ICOM 7000.The PAR OA-50 was MUCH larger & looked kind of strange on my pickup & the 5/8 antenna looks almost unnoticible behind the cab. }:>) Clayton W4KVW

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