Gizmotchy GRK11A Rejection Kit Screen

The Gizmotchy GRK11A (often listed as the “Multi Screen”) is a ground plane radial kit designed for 10 and 11-meter base station antennas. Manufactured by Gizmotchy (a division of Charles Electronics LLC), it is primarily used to enhance the performance of omnidirectional antennas by providing a stable artificial ground plane.
Key Specifications & Features
Application: Used for 10-meter (Amateur/Ham) and 11-meter (CB) radio bands.
Construction: Built with aircraft-grade 6063-T5 aluminum tubing, known for its durability and resistance to environmental wear.
Function: Functions as a radial kit (often referred to as a “Multi Screen”) to improve the radiation pattern and lower the SWR of vertical antennas.
Origin: Proudly made in the United States.
Context within Gizmotchy Products
While the GRK11A is a radial kit, Gizmotchy is most famous for its dual-polarity beam antennas. These antennas are unique because they:
Allow for both horizontal and vertical polarization using two separate feed lines.
Are expandable, meaning you can start with a 3-element beam and add “Power Boosters” (like the GPB-11) to increase gain and boom length.
Can handle high power levels, typically rated for either 1500 Watts or 5000 Watts depending on the gamma match installed.