The problem John, with that experiment is it does not tell you what is happening just above the very lowest angle. By modelling you can see that the last lobe to reduce is that contained down near th
Well Pete, the first 200 is the easy part. I would look at where you are most likely to work new ones, which in your case would be South and EU. I currently have 299 confirmed and my (now) preferred
Jorge, It is a mechanical issue only, dependent on wire type. I used PVC coated copper and even thinner than #17. My 130 radials have been in situ for about 15 years. 73 Clive GM3POI Hello Thinking i
Max best Q comes with a box shape of coil, i.e. Length/diameter about the same. 73 Clive GM3POI Just chopped the fibreglass webs out and now no change, I would not have thought it would affect this c
This is the link I used http://www.ebay.co.uk/itm/262144126639?_trksid=p2060353.m2749.l2649 <http://www.ebay.co.uk/itm/262144126639?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT> &ssPage
Eznec is your friend Dave. Having used a previously short Vertical 51ft for 20+ years, the top loading is not your problem. Because the feed Z is low you will require longer radials. Mine are typical
Hi folks:Iam in the process to reinstall an inverted L antenna. Due to the category 5 hurricane that passthru the island of ST.CROIX usvi i loss 2 towers and antennas.one of the towers use to support
Jimmy, You could do that but it would not work very well. You need the maximum radial density under the vertical. Were they full sized radials or just odd lengths.? 73 Clive GM3POI Hi folks:Iam in th
My plan is to add four active verticals each feeding back to my house. They will be spaced over the entire 7 acres I have here. My hope is I can pick the vertical that carries the highest noise conte
Before worrying about the type of antenna, you should evaluate the needed ground system. As without an effective ground system the actual antenna is of little consequence. 73 Clive GM3POI Hi Is any o
Yes Lee I guess we have all seen as in my case enhancement from here to VK under those conditions including places like KH0, JD1 etc. locals for you guys. However the very best of conditions I have s
Trevor, The good news it is relatively not difficult for you to work 200. By tracking Dxpeditions and being capable of receiving. Beyond that things get difficult, or at least certainly over 250. Thi
I'd hazard a guess at UA1. They do start fairly close to the bottom of the US band (currently hearing one on a simple antenna on 1804.9 and they do go higher than has been mentioned 1825+. However th
Don, seeing your trip is midsummer, you should strongly consider using FT8 for EU on 40m as to Western EU there is NO common darkness. Otherwise the lowest band Western EU will be able to work KH1 is
Rick, I live at about 59 deg North and also have operated from T2 and T32 of which T32 must be similar to KH1. At T32 my guess on propagation is that we could expect in a 4 week on air trip, four EU
Trevor, You do not make it clear whether you want to match the antenna with a hairpin match or with an L match. I find with a hairpin that the inductance does not change much from the needed but the
Or better still, Shorten the L until it is self resonant at 1.9mhz, thereby lowering the amount of horizontal polarisation. Then use a simple hairpin coil across the feedline typically around 5microh
Tom the name comes from the inductance used on Yagi's as a Hairpin match simply because it looks like one. When used on a vertical it simply goes from the bottom of the insulated conductor to ground.
Beware not putting the top yard inside small Teflon tubing. You will have an infinitely high Z at the top and potentially lots of KV. It will burn through the support line. 73 Clive GM3POI --Original
What I don't understand is why would you use more components than needed. Why a capacitor (possibly vacuum). What is wrong in using a hairpin which also DC shorts the vertical to ground. A combinatio