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Are we maybe overthinking this ? A pair of back to back 1N4148's or a BAV99 should be perfectly adequate in a receive situation. I use a pair of 1N4148's across the antenna cable from my "old

Hi Andrew, The 1N4148 ist a fast switching Diode. Some 1N4007 have a long carrier lifetime and behave like a HF PIN Diode. regards, Fred

Hi Jim, I wonder if a 1n4148 and a 1n4007 would work in the same way for HF? Andrew VK5CV Get Outlook for iOS<https://aka.ms/o0ukef> ________________________________ Sent: Thursday, 27 February 2025

Jim, thank you. It's always easier to follow a diagram. Much appreciatedAdam Yahoo Mail: Search, organise, conquer On Thu, 27 Feb 2025 at 3:13, James Redding WA9VEZ via

It will be informative to follow the link below: https://www.researchgate.net/figure/Details-of-the-PIN-diode-construction-top-right-the-limiter-assembly-top-left-and_fig1_271463118 Have a nice

Hi Fred, If I recall, it was an experiment I tried after reading about *tuned* spiral loops (windings in the same plane) in the early days of radio. My intented use was MW only, and I was seeking a

Hi Guy, why did you choose a spiral-loop? The enclosed loop area is a key figure of merit of a small magnetic broadband loop. With a spiral loop the enclosed loop area decreases with each

I've agonised over azimuth sensing - been looking for a battery-powered device with built-in Wi-Fi or Bluetooth sender and a PC Windows receiver that "exposes" the azimuth value for easy capture by a

I have that exact rotator. It is fine for a 1 to 1.5m diameter loop. Although the readout only indicates 10 degree steps, it can be "jogged" to any position allowing good nulls if necessary. Tom

There is a re-calibration sequence in the manual if it get out of whack, but I'm not sure if it covers that situation.

Oops, this 3rd link is the one for photos of the spiral loop on rotor: https://photos.app.goo.gl/tNcv3Dqn3QB4MTqt7 -Guy

I did something similar in 2008. One design was a small bidirectional loop on a rotor, and the other was a four-turn spiral loop on a rotor. Both used Wellbrook ALA100 modules. Support elements in one

The shape isn't critical. Att that matters is loop area (length x height). Bigger area, more gain. /Hans

The SULA is a smaller loop than most FLAG antennas but both bigger than a YouLoop Regardless they are interesting to experiment with and can use a preamplifier The County Wireless loop amp is a

I have the predecessor unit and it is just a two winding capacitor (direction) induction motor with a gear train. The digital display seems to be counting AC cycles. A strong wind (or in my case power

What about this diamond shape antenna, would it better? I have a Wellbrook FLG100 Wellbrok module amplifier. I dont know if the growning flag will be

I just saw this RCA rotor on sale, I don't know that is is precise enough, because it is programmable for every 10 degrees. I haven't read the manual far enough to see if you can precisely set

Maybe is the power supply causing this problem. I have tried to feed with a well filtered external USB adptor but the problem persit. I forgot also I purchased a USB isolator but not results at all .

I agree with Simon, and he raises a valid point that you can use smaller diameter cables, but sometimes things like moulded USB connectors prevent their use, and you have to resort to larger

If the amplifier is genuinely running in class A (which I doubt) it should not generate any RFI. It is difficult to tell from the video if the interference varies in unison with the audio, but the