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It's not much different from a Wellbrook and rotator in terms of cost, but it is much more sophisticated, and a lot of thought has gone into it's design. I think if you are interested in the LF

Hi All, I was browsing for BJTs at Parts Shop in Akihabara. There, a nice transistor called 2SC4703-NE46234? is available at a low

First derivative of frequency with respect to time is phase, so there are no analog wide bandwidth phase shifters, excepting for goniometers. Goniometers have an annoying amplitude variation with

I have the Cross Country Wireless v4, it has good nulls but you have to experiment with mounting orientation to get the best out of it.

I saw their ad but didn't give it much thought.? That's a lot of money for an antenna I have to build.? Dave

Would you or anyone else know where a schematic diagram could be found for such a phasing network that could be used from ~15 kHz to 150 kHz? Gedas, W8BYA EN70JT Light travels faster than

you maybe could add a telescopic whip and phase loop and whip together to have the null at the rear dg9bfc sigi Am 19.10.2024 um 15:09 schrieb Dave Martin:

If you want to go for the gold, have you thought of the Aziloop???https://quietradio.co.uk/ Nick ?

I am.? I don't need gain in any one direction,? I'm looking for a deep notch to be used for direction finding.? On the current loop I'm using the null is deep but no front to back ratio is

Its not remote steerable unless mounted on a rotator. Its an active loop antenna. Assuming you talking about the v4 Simon

Before I go out to modify, in the rain no less, my test antenna I wonder if anyone has experience with the somewhat directional loop from Cross Country Wireless.? Seems like an easy build.? It would

Thanks Mike Tom Anderson SDR_Radio@...

Hi Jim, A mate of mine, Ron, G4GXO, still produces cave radios, using different sized loop antennas, and operating on frequencies below 100kHz, using DSP and Class E PA's. They have been used on

Yes a lot, John, many thanks. And I still prefer "tilt" to "elevation" (height above ground to "normal" people) ho ho ho. James' post is most interesting too. Of course, fine tilt adjustment for a

Thank you John, for your explanation. And yes, your consideration makes sense for me. I haven't yet spent some thougts on that issue but i find it very interesting and challenging to follwo the

I have the Ilkin-Norton preamp built, using 2SC5551 transistors, 9dB version. There are some minor deviations from the original, the biggest one being bigger BN73-202 cores used (this is what I have

Dave Thank you I kind of suspected this… Tom Tom Anderson SDR_Radio@...

The graduate students at Ohio State, "discovered" several abandoned pipes underneath the athletic field that were distorting their expected RF field strength measurements on the surface. . . Unless

Hi Simon, Thanks for providing the consolidated info. My nano VNA is several years old. I need to compare it with the currently available units. Mine is a NanoVHA-H4. Regards Clint

Hi Martin, I agree with everything you said! As I just recently started using HAM/Hobbysist stuff and pretty much my entire career I'm using professional equipment. Also yes, HF maybe harder then