Well, we're mostly all " 'ol farts", Jim, but the alternative is GRIM! 73, Charlie. K4OTV Well, I have the wiring scheme all written out and plan on labeling each connection and checking twice and th
Sad, but true. Folks don't seem to listen much anymore. Seem to prefer being "spoon-fed" DX from Internet packet clusters. Charlie. K4OTV --Original Message-- From: Topband [mailto:topband-bounces@co
Keep that up, Jim, and you may hear some KH6 or other Pacific islands in the morning. Years ago, I worked VK3 one summer morning, when I didn't have time to tune up the amp and didn't want to alert o
Worked the VK3 with 100w from the FT-757GX I had at that time. Antenna - Inverted L. Keep that up, Jim, and you may hear some KH6 or other Pacific islands in the morning. Years ago, I worked VK3 one
Well Jim, when it's summer here, it is winter in VK/ZL and the rest of the southern hemisphere! Good luck! I expect you'll snag one if you stick with it! 73, Charlie, K4OTV --Original Message-- From:
Well, it's winter "down under" - good quiet time for them to hear us! :-) --Original Message-- From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of John Harden, D.M.D. Sent: Tuesday, Au
And then, of course, there's the old-fashioned "bazooka balun" or "sleeve balun" often seen as the lower 1/2 of a vertical coaxial dipole - such a balun also has a planar equivalent that can be imple
I think not, Jim! Check out John's profile on QRZ.com! Still, If I could work VK3 from NC with 100w, I expect that you have a shot from UT with 30w. Mine was NOT an easy QSO, and yours may not be eit
Well, because it's winter in VK, Jim, I expect that they have a better shot at hearing YOU!! Charlie --Original Message-- From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of James Rode
Sounds like a robust relay, just above the feed-point would de-tune the L rather nicely. At least that was my thought. Probably simpler and more straightforward than trying to detune it in the shack.
Well, it sounded like Thomas wanted to de-tune the L, so it wouldn't interfere with his receive antenna when receiving. Assuming that he's only using the L for 160, he would be switching at a high-cu
Well, Tomas If you are comfortable using Smith Charts, you could work out some reactance for any length of feedline to detune the antenna. Other than your 1/2 wave approach, another approach would be
Detuning a wire inverted L seems simple and straightforward. Detuning an electric fence is another matter entirely!! :-) 73, Charlie, K4OTV --Original Message-- From: Topband [mailto:topband-bounces@
Hi, Randy,, Based on my experience, I would add weights to the radials that will enter the pond and extend them as far into the water as possible. My very first 160 inverted L was supported by a tall
I have to agree with Tom. With 60 1/4 wave radials on the ground, you are going to have a pretty good ground anyway, and it won't matter much what you do with a few of them. In my case, the ground ro
I've also had very good results using wire-wrap wire for winding small RF transformers. Pretty easy to work with - and it's rugged. Charlie, K4OTV I use wire wrap wire when winding small cores. The K
Well, my "submerged radials" worked well, years ago. Of course, it probably helped that the lake had been treated with copper sulfate for vegetation control! Charlie, K4OTV Party pooper ! 73, Tod, K0
As I recall, Jim is using 73 mat'l cores. I'd be interested to see what sort of magnetizing inductance he would have looking into the 2-turn primary and what its reactance is at 1.8 MHz. Charlie, K4O
Thanks, Mike! That's good and useful information!! I agree that 450 ohms of reactance is large enough to be "negligibly large" relative to 50 ohms. So Jim might, indeed, be OK with a 2-turn primary.
Well, Jim Since you wound both transformers, why not try them both, and see if you can measure any difference? I' guessing you won't see much! 73, Charlie, K4OTV Thanks, Mike - will try the 2:3 ratio