Good points Tom, thanks. Just one comment regarding paragraph 2 where you say that there is a 'filter' that often has more attenuation of horizontally polarized signals than vertically polarized. I h
Have a look at the download page on my website www.qsl.net/sm2cew where you'll find the VK3UM software suite that includes "The Site and Radiation Calculator" It provides for the FCC and Australian R
A good ham friend of mine in former East Germany, together with a very reputable German antenna specialist, many years ago made some measurements of 432 MHz yagis fed with split dipoles and coax look
Tom, if I say that the test were made at 432 MHz and they were pretty conclusive, they were. On 432 MHz ! If relevant to HF is another matter, and therefore I stated nothing but 432 MHz, clearly reme
And the even so, the pattern on VHF/UHF yagis can be so good that in practice you will not notice any difference. This is also true. Tested and proven, a number of times by myself and others. 73/Pete
Just curious, how is the telco connection done in the states ? What is there to connect to a single point ground? Here in SM it is just two wires coming to the house from the telephone pole, no scree
Tom, What kind of A/B FS comparison could be done by disconnecting radials that already lay on the ground under the vertical, for example with a large relay?? Say you have 50 radials spread out, and
Thanks Jim! Your response tells me that even though radials are spread out under the vertical they need not be connected to have influence on the pattern. But surely there must be a substantial diffe
Please, can we drop it..?? Try sending Steve an email to find out, I'm not the least interested in this. 73/Peter SM2CEW Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any que
No, PL259's work very well even att 144 MHz and I recommend using them. N-connectors are a BIG problem, especially in cold weather as the center pin is pulled out of the socket, frying the connector
Have a look at Sam, RN6BN's webpage http://www.73.ru/ There are pictures of his very tall tiltover towers that use the very same technique described below. 73/Peter SM2CEW Weather Stations", and lot'
Jim, I can tell you that during the contest the aurora was extremely intense at latitude 65 deg north. With that type of conditions I find myself being beaten by a lot of QRP stations despite the fac
I acquired 1-5/8" coax for my 432 and 1296 Mhz antennas and I did not have any connectors for the cable. So I drilled a hole in the outer jacket about an inch from the end of the coax and soldered a
If you want to take a look at some pictures of a BIG 4 element full size 80m yagi, follow this link and click on 80m yagi. http://www.sk2kw.se/SK2KW%20WEB/SM2DMU/SM2DMU%20SM2HTF%20Index.htm 73/Peter
I'd say it has nothing to do with the price of land in Europe... it is rather a proof that Rohn is not a world standard when it comes to tower installations. It can be done "the non Rohn way" also..
I had this happen to one of my towers (80' guyed at two levels) more than 20 years ago. I put a small weld at the two ends of the slit just to make it stop increasing in length, never had a problem t
Hi Roger! Thanks for the info on stop drilling, sounds rather clever. With 3 guy levels I doubt there is much torsional force on the base, most of it is absorbed by the guy-wires before it reaches to
If I remember correctly the crack was 28" from the bottom of the tower. That is not a drain in the correct position, it should be at the very bottom of the tower to do any good. I would drill holes i
I used cutting boards as low friction material for a couple of homemade guy bearings I made for a rotatable tower. The material from the cutting boards was screwed in place on the large metal rings.
I bought all the spare parts for a TH7 driven element directly from MFJ, including the brackets. Brackets were about 6 USD each. Excellent service, had the parts in about a week, and that is delivere