If you've been curious about what an "Active" receiving antenna can or cannot do, without paying the  cost typical of both kit and manufactured units, you will enjoy the experience of building, learning about and using this very simple, budget-priced kit. Just for fun, we carefully tested this little T-KIT 1552 Module board next to active antennas sold by Heath, MFJ, Ramsey. Wow: you'll get the performance without the price tag! Bring ANY HF receiver to life with the 1552 and a small length of wire, or a simple whip antenna! Compact 1.75" square board can be mounted inside receiver or in its own small box. Circuit includes gain control; operates on 6 to 15 VDC.