Re: Topband: Cage wire performance

The problem with cages isn't electrical; the thing to consider is physical. If you are in an area where you can have ice you have to consider if your cage and its supports are strong enough to hold ice under high winds. You don't want a relatively inexpensive wire cage to pull down more costly

Re: Topband: Cage wire performance

Hi Dave, thanks for the analysis. I was using your number 3 model, though I had a small slope in the top wires. When I flattened the top wires I too was getting about 100kc at 24 ohms. I will to do a sensitivity analysis to see what works best for me. Where I set down the 60 radials (laying

Topband: W6 to EU openings last night

I didn't come on last night . . . but I've been working across to Texas, Colorado and Arizona over the past week or so. What sort of time were your QSOs Rick? (will look out for you tonight) 73 Roger G3YRO _ Searchable Archives: http://www.contesting.com/_topband - Topband

Re: Topband: Cage wire performance

Hi Clive, thanks for the input! The existing 75 foot inverted L measures 26 ohms X=2 using 60 x 100 foot radials. This is very close to what the model calculates. Regards , Kenny K2KW > On Jan 4, 2021, at 10:12 AM, cl...@gm3poi.com wrote: > > Kenny a lot will depend on your ground

Re: Topband: W6 to EU openings last night

FB Rick, Its great to see the band opening up further south. The strange thing (as usual for 160m) is during the last solar min (~2009-11) it was more common for the guys down south and CA to be getting the good prop, while I sat on the bench with no signals. I wont even try to explain it, but

Re: Topband: Cage wire performance

Kenny, your model might have a problem with the acute antenna between the two vertical wires. I ran EZNEC simulations to test this and compare against a single vertical wire T reference antenna. Your antenna shows similar bandwidth, but a different input resistance. *Antenna 1 *reference antenna

Re: Topband: W6 to EU openings last night

It was pretty remarkable here in S AZ. I worked UR0MC, LA1MFA and SM0GNU (new for me) and heard some others.  Always on my inverted-L. UR0MC was readable for over an hour. QSB was huge Wes  N7WS On 1/4/2021 8:04 AM, Richard (Rick) Karlquist wrote: Last night I was surprised to be able to

Topband: FCP Question

Hello Topbanders, I have an inverted "L" with 4 elevated radials! I seem to have too much ground losses! I am wondering if I can add an 160 FCP to help with the ground losses?? Any info would be much appreciated! Thanks and 73, Ted  K2QMF  _ Searchable Archives:

Re: Topband: Cage wire performance

So this is more or less like the Bow Tie Dipole antenna that is used like in UHF TV antennas. Sometimes two wires on each side like cat whiskers. and other times a solid triangle on each side. Now I wonder, is there a limit say ratio wise to length vs width at the far end, where you don't get

Re: Topband: 300 ft BOG

Tnx to all who replied. Im attempting to revive the JK Bev-Flex antenna, I tested a few years ago. But am dealing with a bum wrist and shoulder, so am researching it in the meantime. Hopefully in a few weeks I will be functioning again. ISSUE: No sigs heard with the 300 ft Bev-Flex on the grass,

Re: Topband: Cage wire performance https://www.pi4cc.nl/album/80-160/slides/P5030195.html

Hi An easy way to make a cage is to use black irrigation hose. Just make some 30-50 cm diameter circles Drill 3-4 holes and ready to go  https://www.pi4cc.nl/album/80-160/slides/P5030195.html Peter PC2A https://www.pi4cc.nl

Re: Topband: Beverages and Noise

I have very little noise here and lots of beverages. Because of the low noise floor, I can pick up a couple of solar arrays on properties about 2,000 feet away. The beverage - very efficiently - hears that noise when it is pointed at it. In fact, one of them is in the direction of EU and I

Re: Topband: Cage wire performance

On 1/4/2021 7:05 AM, Kenny Silverman wrote: where the wires connect at a point on the top, but with a 4 foot spread of the wires near the ground. This adds about 15-20 kc to the 2:1 bandwidth per the model. Will a 2-wire section like this always behave as a wide/fat conductor or do I have

Re: Topband: Cage wire performance

Kenny a lot will depend on your ground system. If it is very good then that extra bandwidth may help. But if it is just medium quality, there will be sufficient loss not to bother until and if you improve your ground system. Try the bandwidth without the extra wires and see how it compares with

Topband: Cage wire performance

Hello and HNY! I will be converting a wire inverted-L to a T top loading on a 75’ tall wire hung from a tree. To improve the bandwidth, I was wondering about going to a 2-wire “cage” for the vertical section. I’m actually modeling a skinny triangle where the wires connect at a point on the

Topband: W6 to EU openings last night

Last night I was surprised to be able to work SM0GNU, UR0MC, HA8JI, and almost worked IZ4ZZB from my central CA QTH. Especially UR0MC in zone 16 who gave me a 599 report. I don't think I have worked that zone since the ARRL 160 contest during the last SS minimum. All signals had slow deep QSB.

Re: Topband: Beverages and Noise

There are some interesting things going on in the Cross Country Wireless group with phased loops. Look for Simon about half way down this link: https://groups.io/g/CrossCountryWireless/topic/79362931#7537 He tells us that he works across the pond on his multi-turn transmit loop and now has 4

Topband: Beverages and Noise

Sadly Paul I have no space to put up any kind of Beverage . . . Even my 160m Half Wave Dipole runs outside my property ! 73 Roger G3YRO _ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

Re: Topband: Beverages and Noise

Roger, It’s not just the VDSL noise but the SMPSU’s as well that give me grief round here. VDSL affected 30m most as I have overhead poles in my back garden so limited option to escape. VDSL cabinet was a street away. I found the RX loop (Wellbrook) worked poorly near the house and put it

Topband: Beverages and Noise

The major source of noise on Top Band (and 80 & 40m) here in Britain these days comes from VDSL Broadband hash. The problem is that almost every house has an overhead copper phone line going to it . . . so the Service Provider runs Fibre-optic lines to a Cabinet in the street . . . but then uses