Re: Topband: 160m Vertical

Such a cable has practical no attenuation on 160 meter. You can simply do all the tuning in the shack. Verzonden vanuit Mail voor Windows 10 Van: Ron WV4P Verzonden: zaterdag 16 mei 2020 23:46 Aan: Richard (Rick) Karlquist CC: Rob Atkinson; 160 Onderwerp: Re: Topband: 160m Vertical Thanks

Re: Topband: 160m Vertical

Thanks again for all the replies, it kind of jumped around on my end between on and off list replies. Hopefully I have not missed any. The Feedline will be ~300' of 7/8 CellFlex. Legal Limit on power. About 8000' of Radials, In theory, 64 @ 120' but rough terrain will necessitate some

Re: Topband: 160m Vertical

On 5/16/2020 4:31 AM, Rob Atkinson wrote: On 5/15/2020 8:27 AM, donov...@starpower.net wrote: ""A more reliable approach is a tuner in your shack. The extra coax cable loss from elevated VSWR is insignificant on topband."" Another disadvantage of a tuner at the shack end is that the match

Re: Topband: 160m Vertical

On 5/15/2020 8:27 AM, donov...@starpower.net wrote: ""A more reliable approach is a tuner in your shack. The extra coax cable loss from elevated VSWR is insignificant on topband."" We don't really have enough information to make that claim. First, you ought to get a copy of Radio-Electronic

Re: Topband: 160m Vertical

Thanks for your kind comments Ron, much appreciated. Hope to meet you in Dayton in 2021 73 Frank W3LPL - Original Message - From: "Ron WV4P" To: "Tree" Cc: "Frank Donovan" , "160" Sent: Friday, May 15, 2020 4:10:36 PM Sub

Re: Topband: 160m Vertical

-Original Message- From: Dave Cuthbert Aloha Ron. EZNEC ROHN25 model: 128' resonant at 1.796 MHz, 35 +j0 ohms 115' resonant at 2.000 MHz, 35 +j0 ohms 115', 1.800 MHz, 25 -j46 ohms 115' 1.800 MHz, 4.1 uH base series inductor, 25 +j0 ohms Dave KH6AQ

Re: Topband: 160m Vertical

EZNEC Rohn 25 top loading 115' Rohn 25 4 spoke top hat, 66" x 0.500" tubing SWR in a 30 ohm system (match 30 ohms to 50 ohms) 1.800 MHz, 2.2:1 1.900 MHz, 1.2:1 2.000 MHz, 2.2:1 KH6AQ (formerly WX7G) On Fri, May 15, 2020 at 8:13 AM Jim Brown wrote: > On 5/15/2020 8:27 AM,

Re: Topband: 160m Vertical

On 5/15/2020 8:27 AM, donov...@starpower.net wrote: A more reliable approach is a tuner in your shack. The extra coax cable loss from elevated VSWR is insignificant on topband. I strongly agree with this. Another suggestion. Do your best with what you can rig, using as much top-loading as

Re: Topband: 160m Vertical

ase of the antenna. If your TX has troubles to give its power correct to the cable, use a tuner in the shack. 73, Kees PE5T Verzonden vanuit Mail voor Windows 10 Van: fmoeves Verzonden: vrijdag 15 mei 2020 19:20 Aan: topband@contesting.com Onderwerp: Re: Topband: 160m Vertical Tree, Thank you very good i

Re: Topband: 160m Vertical

>> From: "Tree" > To: "Ron WV4P" > Cc: "160" > Sent: Friday, May 15, 2020 3:18:39 PM> Subject: Re: Topband: 160m Vertical>> Slightly shorter makes it easy to use an inductor to make up the> difference. If you make it long - you can do the sa

Re: Topband: 160m Vertical

around the band. > > > > > > 73 > > Frank > > W3LPL > > > > > > > > > > > > - Original Message - > > > > From: "Tree" > > To: "Ron WV4P" > > Cc: "160" > &

Re: Topband: 160m Vertical

; Sent: Friday, May 15, 2020 3:18:39 PM Subject: Re: Topband: 160m Vertical Slightly shorter makes it easy to use an inductor to make up the difference. If you make it long - you can do the same with a capacitor - but it's typically more trouble than the inductor. Tree N6TR On Fri, May 15, 2020 at

Re: Topband: 160m Vertical

> Use a small tapped inductor to tune it around the band. > > > 73 > Frank > W3LPL > > > > > > - Original Message - > > From: "Tree" > To: "Ron WV4P" > Cc: "160" > Sent: Friday, May 15, 2020 3:18:39 PM > S

Re: Topband: 160m Vertical

riginal Message - > > From: "Tree" > To: "Ron WV4P" > Cc: "160" > Sent: Friday, May 15, 2020 3:18:39 PM > Subject: Re: Topband: 160m Vertical > > Slightly shorter makes it easy to use an inductor to make up the > difference. If you make

Re: Topband: 160m Vertical

- Original Message - From: "Tree" To: "Ron WV4P" Cc: "160" Sent: Friday, May 15, 2020 3:18:39 PM Subject: Re: Topband: 160m Vertical Slightly shorter makes it easy to use an inductor to make up the difference. If you make it long - you can do the sam

Re: Topband: 160m Vertical

Myself I like longer, Yes gotta use a cap, But not too big a deal, I find more variable caps at hamfests than roller inductors. PLUS, longer raises the natural impedance too closer to 50 ohms. Of course NOT 50 but higher than 1/4 wave resistance. Joe WB9SBD Sig The Original Rolling Ball

Re: Topband: 160m Vertical

Slightly shorter makes it easy to use an inductor to make up the difference. If you make it long - you can do the same with a capacitor - but it's typically more trouble than the inductor. Tree N6TR On Fri, May 15, 2020 at 8:15 AM Ron WV4P wrote: > I have built an insulated base for a 1/4

Topband: 160m Vertical

I have built an insulated base for a 1/4 wave 160 antenna. The antenna will be XXX' of Rohn 25. In searching I see people using heights from 115' - 130' with a pretty high number around 124'. I do not know how I am going to match it yet, I figure I will do my research on that once it's up so I

Re: Topband: 160m vertical saltwater grounding

Rob, I considered this for my MM SSB. It doesn't work. Several published tests prove that. Ok as an AC/DC ground. Grant On 1/9/2020 01:18, Herbert Schoenbohm wrote: A very effective device called *Dynaplate* works very well as a saltwater grounding system for boats or limited areas to

Re: Topband: 160m vertical saltwater grounding

Rob, This is a good reference. Only one comment: I found recently on C6AGU that on 160 m the 2 -3 foot tidal change cause only a small change in the SWR of a tuned inverted L with its metal base standing in salt-water. I tuned the antenna to resonance with an SWR of 1.2 at mid-tide. Between

Re: Topband: 160m vertical saltwater grounding

I operated on a pier over salt water on 160m in 3 locations. Once with baloon for an inv L. KW with short antenna creates special problems. See my message yesterday. Short radials will have extremely high voltage at a KW level. Small metal plate on salt water may have water sizzling or would

Re: Topband: 160m vertical saltwater grounding

Robert, You only have to "connect" to the salt-water. Don't worry about radials or field of radials. From you coax shield, or whatever GND (common) you have, run as many wires as you can into the water. They do not have to be long: you just want about 6' of wire in the water (even at low

Re: Topband: 160m vertical saltwater grounding

Interesting information here: http://www.arrl.org/files/file/Antenna%20Book%20Supplemental%20Files/22nd%20Edition/Seawater%20Grounds%20-%20by%20N6LF.pdf Rob K5UJ _ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

Re: Topband: 160m vertical saltwater grounding

A very effective device called *Dynaplate* works very well as a saltwater grounding system for boats or limited areas to run full-sized radials. You can get one for $100 from the link below. https://www.jamestowndistributors.com/userportal/show_product.do?pid=13331 Herb, KV4FZ On Wed, Jan 8,

Re: Topband: 160m vertical saltwater grounding

I'm thinking Scarborough Reef?73,Gary K9GS Original message From: Stan Stockton Date: 1/8/20 6:25 PM (GMT-06:00) To: Robert Fanfant Cc: topband@contesting.com Subject: Re: Topband: 160m vertical saltwater grounding How big is the land area?Stan, ZF9CW> On Jan 8, 2020, a

Re: Topband: 160m vertical saltwater grounding

How big is the land area? Stan, ZF9CW > On Jan 8, 2020, at 4:30 PM, Robert Fanfant wrote: > > > Am looking to activate a location with very limited space surrounded by > ocean. Think of a small rock surrounded by saltwater/ocean. The vertical > will be a tall 60’+ fiberglass pole and made

Re: Topband: 160m vertical saltwater grounding

Just bare copper wire with washers or lead fishing weights tied on the ends is just fine if you wish to enhance coupling between the vertical and the salt water, or 4 raised counterpoise wires in the air will also work extremely well.  The main issue is to position the vertical over the

Topband: 160m vertical saltwater grounding

Am looking to activate a location with very limited space surrounded by ocean. Think of a small rock surrounded by saltwater/ocean. The vertical will be a tall 60’+ fiberglass pole and made to resonate on 160m. I would like a way to reduce the required space of the 160m antenna radial field

Re: Topband: 160m Vertical matching Help

On 11/02/2017 11:25 PM, Wes Stewart wrote: Well, yes, the transmitter is looking into the transmission line and then the antenna load, so they are different. To be fair you need to place the analyzer at the input (TX) end of the line. Now the TX and the analyzer see the same thing. But this

Re: Topband: 160m Vertical matching Help

Well, yes, the transmitter is looking into the transmission line and then the antenna load, so they are different.  To be fair you need to place the analyzer at the input (TX) end of the line.  Now the TX and the analyzer see the same thing.  But this isn't a good way to match the antenna to

Re: Topband: 160m Vertical matching Help

Wes Attaway (N5WA)" <wesatta...@bellsouth.net> Cc: topband List <topband@contesting.com> Subject: Re: Topband: 160m Vertical matching Help Trevol, the portion of the coil between the tap and the base of the vertical determines resonance and needs to be variable unless you were

Re: Topband: 160m Vertical matching Help

: Friday, November 03, 2017 1:46 AM To: Russ Tobolic Cc: 'Wes Attaway (N5WA)' ; JC ; 'topband List' ; 'Ronald Gorski' Subject: Re: Topband: 160m Vertical matching Help I Don't think we even have any AM stations in the country never mind close enough to bother my MFJ but thanks for the info, Trevor

Re: Topband: 160m Vertical matching Help

'MR TREVOR DUNNE' <ei2...@eircom.net>, 'Wes Attaway (N5WA)' <wesatta...@bellsouth.net> Cc: 'topband List' <topband@contesting.com> Sent: Thu, 02 Nov 2017 13:19:21 -0000 (GMT) Subject: Re: Topband: 160m Vertical matching Help JC's caution is important. Check to see if you have

Re: Topband: 160m Vertical matching Help

utics.com>; 'MR TREVOR DUNNE' <ei2...@eircom.net>; 'Wes Attaway (N5WA)' <wesatta...@bellsouth.net> Cc: 'topband List' <topband@contesting.com> Sent: Wednesday, November 1, 2017 5:30 PM Subject: Re: Topband: 160m Vertical matching Help Hi guys Before anything else, don't

Re: Topband: 160m Vertical matching Help

Rick, what are the ball park figured on the coil diameter I'm guessing 5 or so inches across is a good place to start Paul. N0AH Sent with AquaMail for Android http://www.aqua-mail.com On November 1, 2017 11:25:42 AM "Richard (Rick) Karlquist" wrote: > You need

Re: Topband: 160m Vertical matching Help

E" <ei2...@eircom.net>, "topband List" > <topband@contesting.com> > Sent: Wednesday, 1 November, 2017 17:25:25 > Subject: Re: Topband: 160m Vertical matching Help > > You need +j34 ohms in parallel with your coax coming in. > This is about 3 microhenries.

Re: Topband: 160m Vertical matching Help

...@contesting.com] On Behalf Of Ronald Gorski Sent: Wednesday, November 01, 2017 2:38 PM To: MR TREVOR DUNNE <ei2...@eircom.net>; Wes Attaway (N5WA) <wesatta...@bellsouth.net> Cc: topband List <topband@contesting.com> Subject: Re: Topband: 160m Vertical matching Help Trevol, the portion o

Topband: 160m Vertical matching Help

Hi Trevor Read Joe, W4TV's answer again ! The coil should be whatever inductance you need to resonate your slightly short antenna . . . then you can use that coil as an auto-transformer to get a good match, ie once the antenna is resonant, you can feed your coax a few turns up the coil. But

Re: Topband: 160m Vertical matching Help

...@contesting.com] On Behalf Of MR TREVOR DUNNE Sent: Wednesday, November 01, 2017 12:12 PM To: Wes Attaway (N5WA) Cc: topband List Subject: Re: Topband: 160m Vertical matching Help Hi Wes Thanks for the reply I can move the point of lowest SWR by moving the tap on the coil, I need to lower

Re: Topband: 160m Vertical matching Help

karlquist.com> To: "MR TREVOR DUNNE" <ei2...@eircom.net>, "topband List" <topband@contesting.com> Sent: Wednesday, 1 November, 2017 17:25:25 Subject: Re: Topband: 160m Vertical matching Help You need +j34 ohms in parallel with your coax coming in. This is about 3 mic

Re: Topband: 160m Vertical matching Help

Start by disconnecting the feedline. Connect a jumper to the junction of the vertical wire and the coil. Now use a grid dip meter and tap down the coil until the antenna is resonant (dip occurs) at the desired frequency. Now connect the feed line (shield to ground) and tap up the coil until

Re: Topband: 160m Vertical matching Help

Trevor, You haven't really provided enough information to solve your problem.  If you want to use a shunt coil then I suggest that you consider measuring the R-jX at your frequency of interest and then designing an L-network using purposeful shortening of the antenna to create a capacitive

Re: Topband: 160m Vertical matching Help

You need +j34 ohms in parallel with your coax coming in. This is about 3 microhenries. This would be around 6 turns on your coil if the turns are spaced a wire diameter. IOW, tap the coax 6 turns from the grounded end. Then tap the antenna to whatever tunes to 1.83 MHz. Rick N6RK On 11/1/2017

Re: Topband: 160m Vertical matching Help

; <wesatta...@bellsouth.net> To: "MR TREVOR DUNNE" <ei2...@eircom.net>, "topband List" <topband@contesting.com> Sent: Wednesday, 1 November, 2017 17:02:55 Subject: RE: Topband: 160m Vertical matching Help Without doing any modeling, an off the top of the he

Re: Topband: 160m Vertical matching Help

) 393-3289 - Shreveport, LA Computer/Cellphone Forensics AttawayForensics.com --- -Original Message- From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of MR TREVOR DUNNE Sent: Wednesday, November 01, 2017 11:54 AM To: topband List Subject: Topband: 160m

Topband: 160m Vertical matching Help

Hi All I finally got the vertical up and running, problem I have now is I can't find a low SWR on the coil, the best I can get is about 2.8:1 no matter where I tap the coil that's the best SWR, I can move that point up and down the band by moving the tap but the SWR stays the same, My

Re: Topband: 160m Vertical Ideas?

to one side at about 45 degrees. It will make the whole system work. You might have to cut or lengthen the 1/4 wave wire to resonance. Subject: Topband: 160m Vertical Ideas? Message-ID: <fb9704b7-ca35-486a-b585-aca26c200...@yahoo.com> Content-Type: text/plain; charset=utf-8 Greetings!

Topband: 160m Vertical Ideas?

or lengthen the 1/4 wave wire to resonance. Subject: Topband: 160m Vertical Ideas? Message-ID: <fb9704b7-ca35-486a-b585-aca26c200...@yahoo.com> Content-Type: text/plain; charset=utf-8 Greetings! Trying to figure out my scheme for 160m. I currently have three crank up towers about 35? apart fr

Topband: 160m Vertical Ideas?

Greetings! Trying to figure out my scheme for 160m. I currently have three crank up towers about 35’ apart from one another. One cranks up to 106’, the next to 70’ and third, to 89’. I figured I could shunt feed one of the taller towers and call it good but I’m concerned about interaction

Topband: 160M vertical on sloping land

At KP2M we have a FCP inv-L for 160M. This has improved our signal from the sloping dipole we originally had up. The land has a steep downward slope towards the north, about 45 degrees. The vertical is about 30’ above an elevated feed about 10’ above the ground. The L portion goes up the hill to a

Topband: 160M Vertical

Hello all, Plan on working at getting back on 160 after a few years of being off the air.  I last used an Inv.L and beverage.  A meager configuration but served me well.  I've been looking for a decent substitute for the inv.L since the nice tall tree I used has been cut down.  Has anyone tried

Re: Topband: 160m vertical with top loading

Not sure what you mean by fictional parts... I thought that I explained the problem with some historical development in my article. The main difference in understanding the efficiency of loaded antenna is that we are not dealing with DC currents and voltages (W8JI argument) but RF currents

Re: Topband: 160m vertical with top loading

I usea top loaded 90 ft vertical with 4 off 36ft top load wires at 45 degrees which also be come the 4 guy wires to support the top.. Other guy are at 40 es 60 ft levels.. I have 60 x 1/4 wave gnd radials, es use a multi tap toroid transformer set at approx 18 ohm point.. In 10 months have wked