I am designing a active antenna (100KHz). Can I use AD 797 (ultra LNA) as the amp instead of JFET. the input output impedance of this opamp are similar to that of JFET (high input imp and low output imp). I have not seen any design implementing opamp in active antenna and was curious if there are any problems.
Loop antennas (magnetic) are known to accomplish this. So I build this simple active receive loop antenna to see if they work… and they do. The noise has reduced a lot and listening to the low bands is not annoying anymore. The simple active receive loop used was found on the internet (link = broken).
2.) SSB-Elektronik ALA1530-SSB Magnetic Active Antenna (from Wellbrook Communications) This Loop antenna consists of a rigid aluminium loop with a diameter of 93cm and a balanced gain optimised broadband amplifier using low noise RF power transistors. The amplifier is encapsulated in resin and housed in a PVC box.
Jul 17, 2012 · A line antenna, or open loop antenna, is usually connected to a single point, however a loop antenna is connected by two wires to two points. That is not what you are doing. Given that is not a coaxial 75 ohm antenna, one wire should go to the center common terminal and the other to the left 300 ohm terminal.
MLA-30+ Active Loop Antenna Active 100KHz-30MHz Receiving Antenna for Medium Wave Shortwave Radio US $26.00-$28.50 Superbat 75 Ohm F male FM Dipole Antenna and 3 Pin AM Loop Antenna for Home Stereo Receiver Systems US $5.62-$7.29
Overall the MLA-30 Active Loop Antenna is good shortwave and mediumwave antenna, almost on par with the MFJ-1886 Receive Loop Antenna, however the If you wish to donate any new or use radios, antennas, radio related equipment or would like me to review a product. You can contact me via...
AML 30, Active Magnetic Loop Antenna. Contribute to Dfinitski/AML-30 development by creating an account on GitHub.
The active loop antenna can be installed close to a transmitting antenna without a problem. PA3GZK use the transmitting antenna 4 meter away from the receiving antenna, which is still intact despite sometimes 1 KW transmitter power. RECORDING MP3 FILES.
Sep 27, 2020 · The loop element of the MLA-30+ Shortwave Loop Antenna has a diameter of 60cm and is connected to the active amplifier housing by two stainless steel wing nuts. The MLA-30+ Shortwave Loop Antenna is supplied with a “bias tee” power injector and derives the DC voltage (12v) necessary for operation from any USB power supply or power bank.