Cushcraft X-7 product reviews by real people like you. I have owned 3 of these X7’s antennas, and they are by far one of the best triband antennas I have. Here I have some photos of how I converted two cushcraft Hf antennas into a Homebrewed version of the Cushcraft X7. Additional material was bought. X7 BIG THUNDER TRIBANDER YAGI The X7 Triband Yagi is geared to set new standards in both radiating performance and mechanical.
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Inside My Radio Room. GM4NHI has an excellent review of the X7 and photos of the large chshcraft of components in the antenna on his site. I had to remove the entire feed system to get all of the tape off. We’ve had the Cushcraft X-7 at our club station for most of the past cusjcraft. Be aware, it’s on both sides of the feed system flat straps, including around the bolt holes, the electrical connections, and will act as an insulator, not a conductor.
Traps were eliminated from the high current driven elements and reflectors using the new 4L Log Cell design, which yields virtual monoband performance and maximum power handling capability.
Contact the site with comments or questions. Very good results on air and excellent SWR. In case of difficulties: Cushraft does not give answer what their computer simulation shows on 6m, can I use it and what is the gain, directivity I would have liked to put up that at my Qth but not enough space to get that size up It is a complex antenna and took three experienced hams two full days to construct it.
It is ready for many more years to come.
There is one big potential “gotcha” that is easily missed and is not discussed in the instruction manual Cushcraft, me and my assembly team believe that you need to address this! I have also used other various antennas including mono-band beams and tri-band yagis during my many years of this wonderful hobby. I would put it up against any antenna in its class, including mono-banders. Just traps from one element was used back There are 2 different versions of the X7 – I have two different installation guides!
Information on my Radios. The end caps on main boom also looked great. The antenna is currently semi built, with the ends of the elements not attached so that the semi-built antenna can be stored without any damage to the elements.
This is a bonus! This is what I enjoy doing in Ham radio. Good for dx-ing with QRP. Very happy with the antenna.
There are still traps in the director, but this is a low current area of the antenna and trap loss is minimal. Short of spending a lot of dollars on separate 10 – 15 monobanders, this semi-log antenna does not disappoint. I get a real good swr on the bands the antenna is designed for Anyone wanting to hear my signal on any HF band. It is a great antenna, I have bought it in used condition and refurbished.
The highest SWR is on 17m 1.
Cushcraft Laird X7 and X9 Antennas
Traps are employed only in the lower current directors for increased gain and sharper pattern. Is it preformer, would it make sense change coax to a low loss one? Additional material was bought The difference is only to see in figure 5 from chapter 3 – “Element Assembly”.
In I moved the a different QTH and while unmounting we really see the very good hardware the antenna is made.
The X7 Triband Yagi – Cushcraft
None of us noticed this covering during construction. OverView of the X7.
Wind Survival mph kph. The SWR across 20, 15 and 10 meters is great and by using the log periodic cell driven element the antenna is useable with forward gain and with very acceptable SWR on the upper WARC bands 17 and 12 meters. Small parts were protected inside strong plastic bags.
Leave a Reply Cancel Reply You must be logged in to post a comment. Maximum Gain dBi 10M. A week or so after the assembly weekend, and luckily while the antenna was on the ground on saw horses, I was inspecting it and re-tightening things when I noticed what looked like a small bulge of something on one side of the crisscross feed system.
Wind Surface Area ft m sq. Once you put this antenna together correctly and get it a reasonable height above ground, you will be amazed at its performance.
This will take additional time, but you will be glad you did it. Cushcraft X7 Yagi Or be careful what you bid for on ebay Having been after a decent antenna for some time, I recently managed to buy a used Cushcraft X7 yagi on ebay.
As with any antenna project you will also want to check and re-tighten, if necessary, all of the SS clamps, bolts, etc. Windload 80 mph, lb kg. Building The X7 Antenna. The bottom line is the X-7 is a superb performer! New to Ham Radio?
This time I drilled small hole on end of each one so any water in main boom can drain. Or be careful what you bid for on ebay.