Pardon me if this is a dumb question for my first post to this list, but this is my first real tower after many years in Amateur Radio. I came across a great deal on a lightly used Rohn 45G: six sect
Pete Many, many years ago, I used a separate receiver and transmitter, along with separate antennas for receive and transmit instead of using a T/R switch. To protect the receiver from the very stron
Hans, There are professional techniques for using Aluminum foil to shield a room, and the trick is to treat the seams and penetrations. Penetrations should be installed on a conducting plate (AL to m
Spencer, Funny you should mention using a shipping container, the new club station of the Catalina Radio Club is built out of a standard size steel shipping container. It is well grounded, and all an
I just want to give a big Thank You to everyone who responded to my query, and an apology to those who responded privately for using the wrong email address that had the spamblocker. I have pulled yo
I picked up an Emotator 105TSX rotator at a hamfest without the controller. I have found a PDF of the manual, so I have a place to start from, but I have never built a rotator controller before. I am
Maximo, Just measure the common mode choke just like a simple inductor, i.e., ignore the center conductor of the coax with which it is wound. Set the measurement to S11, and the format to Smith Char
"OK. BUT -- it's NOT an inductor. See below. Also study k9yc.com/RFI-Ham.pdf Or study it in the ARRL Handbook. It was added in 2011. " I advised a setup for the measurement like that for a simple
Jim, I agree the error can be very large, but whether that error is significant depends on the application. The Keysight charts clearly show that using a professional-grade VNA, the S11 measurement
Wes, This is a most interesting paper on measuring high impedances, I just wish I could find it in English so I could read it ;-) 73, Avery, WB4RTP -- This email has been checked for viruses by Avast
I have been very happy with the quality and prices from this vendor: http://www.pl-259.com/index.html I get this type: PL-259 silver plated, Teflon insulator, gold plated tip I try very hard not to g
Charlie, Would you please share a link to a source that discusses the limits of N connectors? Everything I have seen so far suggests they have as good or better power handling at low frequencies tha
I have been very pleased with the Wellbrook ALA330S amplified loop, although I have not really checked it out on 160. I know it does great on 80, 40 and 20. I did build a cut out relay to disconnect
Please bear in mind that the actual torque value depends on the type of connector and the application, and that over torque can make problems, too. For SMA, brass connectors should be torqued betwee