Hi Press, -- To: <towertalk@contesting.com> I wouldn't apologize for making the line better! 1.) Larger conductors generally have less loss for a given spacing and dielectric. 2.) Lower impedance gen
Hi Steve, coax plug Simple(?) reason, or several reasons: 1.) Calibration of a meter is off. (My stock IC-751A likes to say a 65 ohm load is 1:1 SWR) 2.) RF in the analyzer. (They use broadband detec
Hi Jim, Unfortunately this 377 ohm stuff is the source of much voo doo and pathological science Jim. Claims vary from antennas that synthesize "far field" making a small antenna very efficient to oth
Hi Press, I'm a little puzzled by the worry about oxygen and the dielectric. I understand oxygen contaminates the surface of metals, forming lossy layers of oxides (except with silver) that might inc
To: <towertalk@contesting.com> Hi Dave, Most "ladder lines" are very good feedlines for HF, when dry and installed properly. True open wire is even better. Always remember the electric and magnetic
Hi All, I received about 15 e-mails on this, please excuse the single bulk reply to all. First things first: fast facilitating First, before we go off on a wild winge, let's get the facts. 1.) Any 25
Which has absolutely nothing to do with anything except when the manual was printed, hi hi. -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@contesting.com Administr
I'm not an expert on this, but here's what I understand. Whatever you do, check with a reliable source before you do anything. While everyone tries to help, it's best to be absolutely sure you know w
To: <towertalk@contesting.com> the got Does your unit say 259, as opposed to 259B? 259's were were available at and prior to Dayton. The 259B (despite misinformation published on this reflector) was
Hi Mark, trends have then I'm not sure the Handbook or programs that calculate this stuff allows for capacitance of wire loops through the insulators. Does anyone know for sure if they do? If program
You can not subtract either 6dB and/or 2.2 dB to get dBd freespace. 1.) There is no guarantee ground reflection gain is 6 dB, or any amount of "dB". It might even be loss! 2.) If you subtract 2.2 dB
Clear except here.... SWR has nothing to do with line radiation. Line radiation is only caused by imperfect current balance on the line, no matter what type line. 73 Tom -- FAQ on WWW: http://www.con
-- To: <towertalk@contesting.com> OK here. You might want to consider wording this a bit more careful. It might be misunderstood and incorrectly support incorrect impressions line efficiency is direc
Hi Steve, Naw. Tell it like it is (or like it isn't, hihi) will That is conditionally true IF you are considering the reduction in generator power output and ONLY if the generator meets certain well
To: <towertalk@contesting.com> manufacturer Not in this case. The TA-33 will absolutely benefit from use of a choke balun at the feedpoint. It is idiotic for any antenna "engineer" to NOT use a balu
I sure liked my TA-33. It was my first store bought yagi, and I was amazed how much DX I could work with it! Ahh, the good old days before 160 meters! If one leg of the driven element is grounded, th
Hi Steve, the Nonsense. You've just totally wiped out any form of impedance matching using lumped components in a few clicks of the keyboard. Not only that, you've stopped most of the antennas your c
Reread your mail Ed. You are "crediting" me for statements I never made. Nope. That statement is untrue and it sure didn't come from me. I'll say. -- FAQ on WWW: http://www.contesting.com/towertalkfa
(like the that maximum a a is Not quite. It only makes one trip Dick, and some of the concepts in the text above are incorrect. This is not the proper reflector for a discussion of PA's, or conjugat
Hi Steve, The source must be a dissipative resistance, not a 50 ohm impedance. The only case where that could be guaranteed is if the source drives the line through a large value attenuator pad. That