MFJ-1020C Indoor active antenna, HF
Brand: MFJ

MFJ invented the tunable active antenna! Numerous copies have been made without success -- including most recent ones. Why? Because MFJ has made continuous improvements where others have not. The MFJ-1020C has been completely redesigned with new technology. New technology uses a dual gate MOSFET and a gigahertz bandwidth buffer. It improves gain and selectivity, reduces noise and intermod, and is NOT prone to self-oscillations that can severely damage your receiver.

MFJ-1020 is a "fine value . . fair price . . best offering to date . . performs very well indeed."
MFJ-1020C tuned indoor active antenna you'll rival reception of outside wire antennas hundreds of feet long and pick up signals loud and clear from all over the world.
MFJ-1020C covers 0.3 to 40 MHz including VLF, AM broadcast, all shortwave and all amateur radio bands
It uses a 9 volt battery, 9-18 VDC or 10 VAC with the MFJ-1312D.
The MFJ-1020C measures 6W x 2H x 5D inches. It includes a telescoping whip.