Thanks to all who responded to my request for the C31XR manual (there were several). Bob K6UJ graciously obliged with an electronic copy. Now we're getting somewhere! Towertalk is a great bunch of gu
Hi AllI posted a request a few days back for a copy of the manual for a Force 12 C-31XR yagi. Several very generous list members responded and sent me an electronic copy. As it turns out I have the s
I don't think you can go wrong switching to the Skyhawk. Recently acquired one for the first time and although I have not put it into service yet it appears to me that it is an improvement on the alr
TedOthers have responded with what seems like an unequivical no. Let me chime in with another suggestionNot too long ago there was an article in one of the ham publications, or it may have been a pos
Has anyone ever tried to model in EZNEC a C31XR tribander, the one sold by JK ? I would specifically like to know how to model the feed system which consists of two pieces of aluminum angle that conn
Assuming the math regarding the force that will be imposed upon the winch presented by others is correct, and it certainly seems logical so far, my 45+ years in the construction industry framing buil
Hello Collective WisdomI am thinking about building an H-frame hydraulic press for the purpose of bending up some brackets out of 1/8" aluminum plate for element to boom clamps on hf yagis. Does anyo
TomNorm's Rotor sales and The Rotor Doctor are two that come to mind. I see they both have web sites so I assume they are still in biz. There are also a couple fellows who advertise regularly on QTH.
Dave Well said. My experiences have been exactly as yours. Before I learned how to model I felt like I was just spinning wheels, never knowing whether I was proceeding backward or forward. In his boo
A question for the number crunchersIs there a free app out there that can open and work with the .wk file format that the old W6QHS yagi and mast calculator spreadsheets? I have not used them for sev
Does anybody know of a tool for calculating the forces associated with sizing guy wires on a tower? It feels to me that this would lend itself rather easily to a spreadsheet where one could enter the
Thanks to all who responded and for the link to K7NV's excellent work. What prompted my original question was a visit to the home of a member of our local ham population and upon learning of his prop
HerbI have done alot of experimenting with the old F12 C3 line. What you are proposing is certainly feasible. If I were going to do it I would definitely model it in EZNec first before I touched a si
HerbNow that I know what your game plan is, I will try to model it for you and see how EZNec says it will perform. My copy is only NEC 2 and I have heard NEC4 does a better job but I don't have a cou
PhilThe way I do it is take the average diameter of 12" x 3.14 = circumference x number of turns = total length. That gets you pretty darn close. Tom H K0SN __________________________________________
IgnacyTry heating the larger diameter tubing portion close to the joint while simultaneously cooling the smaller diameter portion which is telescoped inside of it. Tom H K0SN ________________________
KirbyOne way to avoid swaging is to use intermediate short piece or pieces of standard tubing sizes as sleeves to neck down from your larger size to the smaller. This works if the original tubing and
I would like to measure the self-resonant frequency of the reflector on a home made 20 meter yagi. It seems obvious the best way would probably be to open it up at the center and make it into a split
TTersTo all who participated in this thread: I received some valuable information from several contributors and learned a lot. In fact, there were so many that it will take too long to thank all pers
Hello SimonK7QA and I have been playing with the exact thing you are contemplating, except that we are doing it on an old Hy-Gain DIS-72 linear loaded 40 meter beam. We started by winding loading coi