How important is it to get that Beverage termination resistor just right? Using 4nec2 I do some modelling to show that the RDF and far field pattern of a Beverage is not greatly effected by the termi
Jim, Great explanation! steve ve6wz _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contes
I have received a number of email questions asking how I switch my Beverage wires in the field. Here is a video that shows the design of my cascaded 2 relay high isolation 4 relay switch box, as well
This morning I uploaded a YouTube video explaining the method for tuning any 2el parasitic array. I do some experiments in my workshop using the Nano-VNA on a small 2 el Yagi to explain mutual coupli
Mike.. I didn't bother with the pan-tilt-zoom function on my cameras, but it can be handy. The tower mounted camera is on the mast, so I just rotate the beams for 360 deg view. BTW.I shunt feed the t
Here is a YouTube video I uploaded a few days ago that explains the difference between end-fire and broadside phasing. I show how this principle is applied to Beverage pairs in either end-fire en-ech
Hi Rich, I used the MFJ 1026 (I had 2 of them) and also used the NCC-1. I used them to phase various antennas including my en-echelon Beverage pair which were fed with CAT5 instead of RG-6. They work
Today I uploaded a video to my RX series which explains the Magic-T combiner. I have received a few emails asking me how do I make the magic-T? so I thought a video would be helpful. I show the metho
Gary, All but 2 of my 15 Beverages run downhill from my remote station which is also on the crest of a hill. They are not BOGs, but 800-1000 wires about 8-10 above ground. They perform exceptionally
Wes, You are correct. The original numbers for the CC coils from Brian's program were far too pessimistic, especially regarding his form loss algorithm. Brians new coil program is more realistic. In
Dave et al, This has drifted off topic, but I dug out my 4NEC2 Cushcraft XM-240 models and coil calculations. (please be aware I have not checked the details of this modelling since I did it some tim
Dave Indeed few will be motivated to implement a complex in-band switching system, but if you are a home brew antenna builder, its not that difficult, but it is NOT plug-and play. I like to build ant
I have received a few direct email questions about this thread.. Just to be clear, the reason for inductor switching at the Yagi elements is NOT only to get a good, low SWR" match at the driver. The
Mike, I plan to make YouTube video about this, but did you read the modelling section of my 80-40m Yagi paper? Perhaps that is exactly the message in the bottle if you are looking for? https://drive.
How does the XM-240 Yagi really perform across the full 40m band? Today I uploaded a YouTube video where I use 4nec2 to model the XM-240 Yagi and show the gain, F/B and SWR performance across the 40m
Hi Dick, I have 15 Beverage wires, 5 of which traverse within 50 feet of the main XMIT shunt fed tower, and 3 of the wires are only 30 feet from one of the parasitic 160m elements. (my JA, West, Nort
Roger, Each HI-Z amp (impedance buffer) at each element already has a 1:1 braid breaker choke at the input so is already isolated from the feedline. The chokes at the combiner prevent all the feedlin
Yes. I wrote this paper about it. I talk about about modelling, design, construction and about tuning the array: https://drive.google.com/file/d/1eVklkZtlJW93JIJ9oDqbCyl-Jkik6YEX/view <https://drive.
Ignacy, I did notice that you were planning for elevated radials. Be aware that the gain and F/B of the array is very sensitive to parasitic loss. Ground loss will quickly diminish the current in the
Today I uploaded a YouTube video describing my new 9 circle combiner board PCB design that has small Murata SMD CMCs on each RG-6 feedline. I include PCB file links to download in both KiCad format o