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Two pictures are attached.

Hi Dave, Yes, You are right! There is no need to invest for old devices. tnx & 73, Hisami 7L4IOU

Hi Fred, Thanks for the advice. I had gotten a Soviet KP901B about 20 years ago. I remembered it and tried to improvise. The radiater is a Jpanese brass coin with a hole. Indeed, it worked as an

Hi Martin, Thanks for the advice. I have some low noise audio FETs (2SK170 etc) that I got a long time ago. I thought could not use them for RF because of large Ciss. However, LTSPICE simulation to

;-) That reminds me of the note in the AziLoop manual, “To be clear, the antenna does not move” Thanks for your explanation and assessment. Especially the reference to the earthing, which I will

Thanks Guy, I know your and Walt's ambitions for AM-DX, your solution is already very perfect. I can see that the size (one meter up or down) will be a very good option, also the self-supporting

The J-310 would be a much better choice. Dave - W?LEV [email protected]> wrote: -- *Dave - W?LEV*

Hi Christoph, I use 16m (50ft) circumference (W=20ft, top H=15ft, bottom H=4ft) .? I decided on this size for 9dB or 10dB noise over-ride from the antenna on 160m. using only 4 x 3.5m elevated

Most interesting!

With todays knowledge, the usage of a MOSFETs in the front stage of an active e-field impedance converter is not really a good idea. Even if some professional active-monopoles like the Eastern German

Hi Hisami, The circuit and principles shown in the article are valid, but the reasoning behind them is now somewhat dated. The use of a power FET for this purpose was "state of the Art" at the time

Hi Vojtech, Thanks for the reply. "neutralisation" is a nostalgic word. I hadn't been aware for years. It filled few pieces of the puzzle. Thanks also for the explanation of the traps. I tried to

I try to

Guy Atkins <dx@...> added the photo album Azi-Loop Self-Supporting Structure for Transportable / DXpedition Use ( /g/loopantennas/album?id=301249 ) : My in-progress design

Hi Christoph, The image you uploaded from Dave's excellent presentation actually shows a circumference of 13.8m; close, but not quite the 15m you mentioned. I currently have an Azi-Loop in the

Hi All, I found an interesting site, there a archive of the defunct "ham radio" magazine. https://www.worldradiohistory.com/Archive-DX/Ham%20Radio/ I have been reading this article intensively for

Christoph Ratzer <ratzer@...> added the photo album AziLoop Loop Dimension 2025 ( /g/loopantennas/album?id=301232 ) : In the presentation Dave showed a circumference of 15

Hello from Austria, I am an enthusiastic mediumwave BC-DXer and operate a small remote station outside Salzburg, which I have built up over the last 14 years. (https://remotedx.wordpress.com/ As I

Addendum: I am more inclined to trust IN3OTD's data because there isn't much opportunity to screw up a S21 measurement on a VNA. However, the Cedola et al's time domain measurement (OCVD) has more

I have a problem reconciling the measurements of Cedola et al and IN3OTD. I plotted IN3OTD's Fig. 1 data on a graph comparing 3 different types of *real* PIN diodes (below). ?IN3OTD's data are the