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Greetings, I was again pondering some possible low-voltage RF amplifier designs and I stumbled upon a possible idea for a low-voltage (1.2 volts) wideband (untuned) active loop antenna amplifier. I'm

That is found by trial and error. I use a toroid for coupling and get a perfect 1:1 with 5 turns on two stacked FT-240-61 cores on a 5 1/2 foot diameter loop. I use 1 inch hardline for the loop

Here is the link for the info you require http://www.nonstopsystems.com/radio/frank_radio_antenna_magloop.htm

There are some details on the web somewhere but mine used a type 64 toriodial ring (I think) nested in a slot on top of a plastic plumbing pipe mast with the loop through it and had two tight turns of

I agree with the other poster, just a basic magnetic loop, simple to build, I used the easy toroidial ring feed for mine as I work mainly qrp which also means the tunning capacitor vanes do not have

If you could swap the size of the actual loop and use the SAME capacitor would this be possible. In other words if you were to build a loop better suited for say 14 mhz - 228/29 mhz and a separate

I was given all components of a 8' loop, 0.75" copper tube with huge butterfly capacitor. I plan to use a ferrite core as coupling. How many turns to match to 50 ohms?

I suggest that before going to far, you Google Magnetic Loop Antennas -- there are lots of examples and you should have a good idea of the many ways others have built them -- and you can take the best

Active AM Antenna With Twin Coil Ferrite by C. Crane Co. http://www.ccrane.com/antennas/am-antennas/ JLKolb?s antenna links including the KRS AA-1 Active Antenna schematic, antenna preamplfiers,

If you have a link relevant to the group, please post it in the Links section. If you just put it in a message, it will get lost in the shuffle after a few days. The coverage of the list is pretty

Hi Lane, I have used one of these extensively on 10 meters. I love that antenna. You can see a picture of it on my QRZ webpage. (KR7K) I have modeled these extensively and they will work in either

I am new to the group. has anyone built or is familiar with this transmitting loop? Thanx, mike

My question is can I use all the plates on my capacitor ? ---In loopantennas@..., <pmooney22@...> wrote: "I'm a QRP operator and never use more than 5 Watts (SSB). With the antenna in the

Hi All, I have just posted the second video about my Antenna Tuner with two capacitors controlled by Android and Arduino. It is still for QRP station. Thanks to the Alexloop manufacturer idea and

There are two KR1ST loop designs. One for transceive and one for receive only. http://www.kr1st.com/swlloop.htm G4MRK

"I'm a QRP operator and never use more than 5 Watts (SSB). With the antenna in the living room and at this power level I've been able to work Europe, Asiatic Russia, the Caribbean, South America,

The KR1ST antenna is receive only.

If I am only using 5 watts from my kx3 why wouldn't I use all the plates ? Hal w4hal ---In loopantennas@..., <m.bunner1@...> wrote: re: KR1ST antenna real world feedback--- i just built

re: KR1ST antenna real world feedback--- i just built this antenna last week. i saw an improvement of 4- 5 S-units signal strength (generally) and a great increase in readability. also some reduced

A good person to ask about this would be Iian M1OOO at the Sidmouth Observatory, he spends most his life tracking solar noise and once had myself and a few others chasing up and down the bands