Excelent work Jim. Big thank to share all this knowledge with us. Heppy Xmas. 73, Maximo - EA1DDO Visita y registrate en el nuevo Foro Radio Técnico http://foro.ea1ddo.es/ <http://foro.ea1ddo.es/> __
I'm a firm believer modeling, as well. I use 4NEC2, Mmana & Eznec, and I trust them too. 73, Maximo I'm a firm believer modeling. I use EZNEC and AutoEZ and trust them. Wes __________________________
Months before, they´ve sent a stationary satellite beyond the Moon, to relay the signals to Earth. 73, Maximo <http://foro.ea1ddo.es/> Howdy, TowerTalkians -- The recent Chinese moon landing on the d
Hi Gedas, I use Coil32; http://coil32.net/ Hope this helps. 73, Maximo <http://foro.ea1ddo.es/> ________________________________ De: TowerTalk <towertalk-bounces@contesting.com> en nombre de Gedas <w
Have you seen these rotators: https://smart.antenna.it/ 73, Maximo <http://foro.ea1ddo.es/> Hiya, Dick -- Correcto mundo. They are the best. I have a chapter devoted to rotators in my UP THE TOWER bo
Optibeam will outperform KT34M2, and it is much more modern design, build on top quality materials. Maximo I forgot to add, we do get winds of 40 to 50 mph during winter here in Minnesota. Sent from
Hi Garry, Rig Expert is far far better. Quality and features. But, if you can afford it, you can go to a mighty KC901, a two ports true vectorial VNA: http://www.deepace.net/shop/kc901s-9khz4ghz-hand
There is a smaller (and cheaper) brand new model called KC901C+, same as below but limited to 2 GHz: https://www.alibaba.com/product-detail/high-frequency-Vector-network-analyzer-KC901C_60298762343.h
Hi Rich, That system is same as used in other solutions, for example the Arduino based K3NG. The sensor is a "digital compass", for example based on LSM303 or HMC5883L chips. You place the sensor in
Hi Glenn, As you said, folded driven element is around 200 to 300 Ohm impedance. To transform that to 50 Ohm is not a balun, it is a impedance transformer. You can transform 300 Ohm to 50 Ohm and sti
Just to add 4NEC2 opens Eznec and Mmana files. Once you are there, I personally like 4NEC2. 73, Maximo - EA1DDO On Windows: 4nec2 and eznec are probably the two you should consider, both have a varie
Hi all, Telescopic Aluminum masts are easy to make using metric tubes. Using 2mm wall tubes, then 30, 35, 40, 45, 50, 55, 60, 65mm (and so on) external diameters you get the telescopic feature easily
Hi Wes, .120" x2 = .240" to .250" it is only .010" clearance (which is 0.25mm !) That's really tight, in fact I think it is not practical for telescopic portable use. .058" x2 = .116" to .125" it is
I've got all the information. Now things are more clear. Much appreciated your advice. Thank you very much, Wes, Roger, grant, John, Terry and Jim. 73, Maximo <http://foro.ea1ddo.es/> These camera an
Cut the bad section, then get a piece of boom to slide over the good section. Finally slide the other boom section into the new extension. It can be done with outer extension, inner, or both. It is m
Hi Bruce, A multiband "classic" Yagi + Duplexer will allow you to do what you want. Most multiband Yagi antennas; Optibeam, etc. With one or two feed points. Then a duplexer (you will need some filte
Jim, for SO2R (2 radios, only one antenna feeder), Is a diplexer enough? Several thoughts. First, a SteppIR Yagi can be used on only one band at a time, so if you can have only one tower and only on
Yes Jack, you are right. Diplexer is for two bands, for example good dual band antennas. Triplexer is needed for triband antennas. Thanks Jack and Jim. 73, Maximo It really only works for two bands.
Hi all, As Jim knows, I've spent some time investigating and learning how to measure chokes correctly. That was a year or two ago. Transformer type baluns are more difficult to measure with a two por
RG400 is exactly the same as RG142 but the inner conductor is stranded, hence more flexible. 73, Maximo <http://foro.ea1ddo.es/> with PL-259s (and reducers) on both ends. It looks like RG-400, about