Topband: 80m rotatable dipole load coil questions

I am building a 90 ft, 80m rotatable dipole. I am near the point of fabricating the inductors/coils that will go about 23 ft out on the element. I am guying the element just before the inductor. I have several questions: 1. Does the size of the gap between the center element and element tip make

Re: Topband: Fw: WD-1 Wire impedance

RF measured two different batches of the Plastic covered WD-1A   wire. One was 130 ohms and the other was 150 ohms. Lot of hams use it for two wire beverages with good luck.   1. Remember postings saying Beverage wire  size  could be very small if it could be physically supported. This

Re: Topband: Topband Digest, Vol 166, Issue 5

I disagree. The inverted Vee, specifically, transmits vertically polarized RF and has about the same gain as a 1/8 wave tee top ground plane vertical, if EZNEC is to be believed. Inverted Vees can also be arranged in arrays. They are useful DX antennas; I got a 559 signal report from a Dutch

Re: Topband: phased inverted V dipoles

Well said, Guy! I should post this alongside W8JI's quotes and ON4UN's charts on http://www.w0btu.com/160_meters.html . :-) 160 is on the vertical polarization side of a dotted line somewhere between > 160 and 80 meters where there is some poorly defined and poorly understood > modal shift,

Re: Topband: phased inverted V dipoles

Yeah, I could believe that. On 80 meters I could believe that. N4AF/NY4A had a fixed Northeast 80m 4 element wire vee yagi off two towers and a 220 foot catenary suspended between. Apex of the vee's 100-120 feet. It was a killer antenna. But it was also on the horizontally polarized side of the

Re: Topband: Fw: WD-1 Wire impedance

Hi Gary, Thanks. This must be it. Hope it helps the OP. win.i1wqrlinkradio.com/archive/OH2BEN_Reversible_ Beverage_Array-20-10-2007_04d.pdf 73, Mike www.w0btu.com On Mon, Oct 10, 2016 at 5:03 PM, kd9sv wrote: > Mike, do a search for "Killu" wire from Finland...the author

Re: Topband: Fw: WD-1 Wire impedance

Sorry, that's not the correct thread. I'll have to find it later. It had to do with with a ham in Finland (?) who actually did some measurements and may have posted them online. 73, Mike www.w0btu.com On Mon, Oct 10, 2016 at 4:52 PM, Mike Waters wrote: > Here is a thread

Re: Topband: Fw: WD-1 Wire impedance

Here is a thread from 7/23/12 that may answer this question. This URL is only one post in the thread. Follow it down from there. lists.contesting.com/pipermail/topband/2012-July/038223.html 73, Mike www.w0btu.com On Mon, Oct 10, 2016 at 1:24 PM, HAROLD SMITH JR wrote: >

Topband: T31T on 160

The T31T 12 meter ssb op announced at 2145z today that they "may" be on 160 tonight. Mike W2LO _ Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: phased inverted V dipoles

Hi Guy Thanks for your detailed reply. I am building a two-phase vertical for 80 meters, 1/4wave separated. Untill now I usee 1 single vertical with around 50 or 60 radials and I have noticed that towards East the dipole works way better than the Vertical (maybe because towards NA I have a down

Re: Topband: Fw: WD-1 Wire impedance

But believe the WD1A really works well at this QTH in both forward and reverse modes. I have made many direct comparisons on extreme DX on 160 and the WD1A was the difference it too to hear the weak signal. My tests on the VK0 and VP8 Dx-peditions with a 600 foot single wire Beverage and the

Re: Topband: Fw: WD-1 Wire impedance

Hi Herb and all, When I was in the Army, 1958 to 1960,, I was a "Field Communications Crewman". It meant, I helped string telephone wire. We used what was called WD-1TT. It was two separate conductors. They were twisted, not molded together. Each conductor was made of 3 steel wires and 4

Re: Topband: phased inverted V dipoles

If that were not enough, W8JI famously had a 160 dipole up 270 feet doing A/B tests vs. his verticals, this for over a year I think. In the end, he heard better signals on the dipole just a handful of times. Most of the time the verticals were significantly better. 160 is on the vertical

Topband: WD-1 Wire impedance

Thanks for all of your input. I have been reading this forum for many, many years but this was the first time I called upon the collective wisdom of the group. Your responses were greatly appreciated. Thanks, Jim W2SM _ Topband Reflector Archives -

Re: Topband: WD-1 Wire impedance

Herb, Is that impedance for audio or RF frequencies? The best this is to use a RF bridge or analyzer to determine the impedance at the frequency of interest, which is 1.8Mhz in our case. Mike N2MS - Original Message - From: Herbert Schoenbohm To:

Topband: Fw: WD-1 Wire impedance

- Forwarded Message - From: Herbert Schoenbohm To: topband@contesting.com Sent: Monday, October 10, 2016 11:54 AM Subject: Re: Topband: WD-1 Wire impedance Some discussion of WD-1A on Google claims the impedance is 170 ohms and other claim 70

Re: Topband: WD-1 Wire impedance

Some discussion of WD-1A on Google claims the impedance is 170 ohms and other claim 70 ohms. I have 1/2 mile on a spool that I will measure with a bridge and several resistors to see what is the nearest. On 10/10/2016 12:38 PM, Herbert Schoenbohm wrote: The impedance of WD-1A is supposed to

Topband: WD-1 Wire impedance

I use a DXE reversible beverage system using 450 ohm ladder line which runs along a fence line between a few friendly neighbors. However, a couple have commented that “that big wire really sticks out, especially in the winter,” so I am looking to replace the ladder line with something less

Re: Topband: phased inverted V dipoles

Probably not worth the effort as any dipoles less than 250 feet high are serious cloud warmers. On 10/10/2016 9:21 AM, Filipe Lopes wrote: Hi guys We are rebuilding our station and I was thinking about putting up 2 dipoles 1/8 wavelength apart. Has anyone ever tried to phase them for

Re: Topband: VE3OSZ QRT on 160

I agree. Even a simple helix or slinky on a 30 foot fiberglass pole with a 3/4 in 10 foot aluminum extension and some 3 foot whiskers on top of that against a ground of a few radials would keep you in the ballgame. It could be all self supporting and withstand a 60 mph wind. Herb, KV4FZ

Topband: phased inverted V dipoles

Hi guys We are rebuilding our station and I was thinking about putting up 2 dipoles 1/8 wavelength apart. Has anyone ever tried to phase them for example with Christman method? Thanks Filipe Lopes CT1ILT aka CR6K Sent from my Huawei Mate 8 _ Topband Reflector Archives -

Topband: Fwd: [FRC] Haiti needs radio help

hello Many will remember and will have been pleased to work 4V1TL last January. Well, unfortunately this could not happen anymore in a short time, Everything is on the floor. This was made possible by the work of some people that unconditional invested and donate a lot of money and radio stuff to