Pete, I've been watching some of the replies on modeling etc. Perhaps there is some confusion over what antenna modeling software is doing and how it is done. I'll try to put it all in perspective. L
Rajiv, Yes, I too experienced all kinds of problems with some commercial W2DU baluns. So, here is what I did to solve the problems. I use one of those center insulators, the HQ-1 available from Radio
Tom, You didn't mention the great performing 5-band HyGain TH-11 from which I think the CC X7 was derived (but with 2 less bands!). I do agree that obtaining the extra 2 dB over a 2 element Yagi take
Hi Clive, On occasions, I've used another Beverage termination technique, albeit more costly. I use a transformer similar to the one on the receiver end at the termination end. Then, I terminate it w
Hi Rick, Let's not forget that the receive signal improves too with increased antenna gain usually because the pattern is narrower and therefore, noise pickup is decreaed. I had a drastic improvement
Steve Etal, Mike at Traffie Technology made me a specially built mono-band Hex beam to test at my QTH for 40 meters. It has been up about 3 years. It is optimized for the CW portion of 40 meters and
Press etal, Some time ago I measured various coax lines on a Hewlett Packard 8753 Network analyzer. This instrument is very accurate up through 3 GHz. Here are my measured values of insertion loss at
Hi Con, In the early 1980's, I constructed a broadband receiving type "sloping terminated V-Beam" for use on US Navy receiving sites in the 2-30 MHz region. It had a few neat innovations and worked q
Dan, I published just such a design with 3 elements on a 6 foot boom (gain 5 dBd) and 4 elements on the same 6 foot boom (6 dBd). See Communications Quarterly, Winter 1998, "Yagi/Uda Antenna Design,
Sylvan, I think you are referring to a bottle from General Cement called "strip-X" or something like that. A few years ago I tried to buy some and was told it was a hazardous material and was either
Mike, This discussion is mixing apples and oranges so let's try to get the record straight and sort it out. The Force 12 feedline approach using 100 feet (the length is not critical or magical) of tr
Judge, The beam you are referring to is the K8CC (not W8CC) Yagi. One had to be very careful adding "clap trap" to a specific design without understanding the originators design intent. In this case,
Hi Jeff and gang, I wouldn't play around with any bees anywhere but especially on a tower. A sudden sting could cause you to fall or get injured from the reaction. I am most allergic to yellow jacket
Hi Tom, Just for fun, today I tried to order from AES an MFJ-1792 vertical (yes, I spelled it correctly). AES no longer carries that antenna. So, I called MFJ. After a long search, a phone call cut o
Richard, Extra elements add wind load and cost to a Yagi antenna and in some case this an important consideration. Minimum number of elements is also all that is needed for narrow bandwidth (such as
A simpler solution is to use the G5RV with 102 feet overall. It's smaller and has a reasonable match to 50 Ohms on both 80 and 40 meters. 73, Joe, W1JR List Sponsored by AN Wireless: AN Wireless hand
Hi Willie, Not necessarily so! At my prior QTH I had 3 G5RV slopers with 102 feet overall (on the flat top) and about 30 or so feet of 300 Ohm twinlead feeding a 1:1 (W1JR style) current balun to an
Ford, Have you contacted any of the people that used the Colatchco verticals in the 1980's? If I am not mistaken, they had a version that used a switch. Perhaps their experience would help. 73, Joe,
Hi Bob, Per the ARRL Antenna Book, the approximate power rating of RG8X with 1:1 VSWR and 40 degrees C. ambient is 1830 Watts on 160 meters, 840 Watts on 40 Meters and only 360 Watts on 10-meters. Ha
Mike, I can only speak for the Cushcraft R7. It is a compromise 7 band 3/8 wavelength (electrically) vertical that uses 7 radials each 49" long that act as a counterpoise for the lack of a ground sys