Well, of course not, Tom! I need to be more precise and keep in mind the "audience" on this Reflector, and that you are always lurking out there in the weeds to chide and chastise me! Of course devic
All generally true, I expect, but I also believe that dielectric constant and dielectric losses also figure in and the lowest loss lines would be filled with air, dry nitrogen or evacuated. I expect
By the way, Carl, you indicated that whe you were tapped at 90', the real part was 60 ohms when you tuned ou't the series reactance with th;e series capacitor!! Gee!! That ain't a bad match!! Should
Well, if those 4 discrete tap points are the only ones that you have available, Carl, you likely won't find one that give that gives you 50 ohms real. So the best that you can do is pick the one that
Thanks, Jim Well, I confess that most of my professional work has been near or above 1 GHz Thanks for tip about the Times datasheets! 73, Charlie,K4OTV If you run the equations, you find that below a
Hi, Carl I did a bit of further investigation and work on your problem. I think you are done, as follows: 1.0 Just tap the Skyneedle at 90' and tune out the series inductive reactance with a variable
I'm a great believer in ferrite sleeve baluns, Carl! That's all that I use, and with a little work you can even connect two of them for 4:1 nalance. 73, Charlie, K4OTV The lowest loss cable I have he
Do tell! Dielectric losses become evident at 2M with 1500W and at 432 400W of steady carrier will heat up even the best N connectors and RG-213. For that reason many are switching to the 7/16 DIN. Ca
Sorry, Carl! My loss tables didn't translate from HTML to the reflector. I'll re-build the tables manually and re-send this message! Sorry! Charlie, K4OTV --Original Message-- From: Topband [mailto:t
Hi, Jim Well, Maxwell's "W2DU" balu ns are ferrite sleeve baluns and you can get those that go down to 160m. It's a matter of choosine the right ferrite for the frequenc;y range of interest, and usin
Hi, Jim Well, Maxwell's "W2DU" balu ns are ferrite sleeve baluns and you can get those that go down to 160m. It's a matter of choosine the right ferrite for the frequenc;y range of interest, and usin
Well, here it is with the re-built loss table, Carl 73, Charlie, K4OTV From: Charlie Cunningham [mailto:charlie-cunningham@nc.rr.com] Sent: Saturday, February 15, 2014 11:35 AM To: 'Carl Braun'; '160
Thanks, Carl! Well, if you' heard a RX peak at 1770 KHz, it seems that you are awfully close! Just needs a little careful "tweaking" I would think. (I ass'ume that you are probably shootinf for somet
Hee! Tom After reading your post yesterday I had a dream that I woke up and saw one of those flying monkeys on top of my tower laughing and sawing away. Carl AG6X Hi Carl, It sounds like you are tryi
All true, but I don't thnk Carl needs to shorten his tower or remove the yagi! I'd just use a series tuning capacitor! :-) Charlie, K4OTV The step up ratio of a folded dipole occurs because the fed c
Walt surely did "know his stuff" and he published some great material!! 73, Charlie, K4OTV Walt Maxwell was not only a real nice guy, he knew his stuff. Walt was a senior antenna design engineer for
Wow!, that's perfect, Carl!! That should result in better than 1.2:1 load VSWR!! No wonder you see a "flat" line at the transmitter end! Looks like either 90' or 67' would be good tap points, but 67'
FB, Carl! Well, if you're hearing well on that tall vertical, the noise environment must not be too bad in your area, It's pretty bad here in Raleigh, so I had to resort to terminated receiving loops
Hi, Gary! I hope you've measured the antenna directly with your MFJ 259B with the coax disconnected to be sure that the antenna hasn't changed in some way. Think I'd check that (if you haven't alread
BTW, Gary Are you using "crimp-on" connectors on your coax? 73, Charlie, K4OTV It does not matter if he recorded something or not, the 259B will find the fault location. Gary, I would try it on a spa