Balun Hybrids include an impedance balun (2:1, 4:1, 6:1, 9:1, 16:1, etc) and a 1:1 balun (choke) in a single enclosure. Use on OCF, loop, terminated dipoles and similar coax fed antennas requiring an impedance transformer Suppresses common mode current on the coax outer braid (prevents your dipole from acting as a tripole!).
Model # PA-SWL-1 includes MLB-2 Long Wire antenna matcher, 50 feet of insulated wire and 25 feet of support cord and a end insulator for the antenna. Great for short wave listening and works as a bent antenna, sloper, inverted “L” antenna (Vertical and horizontal) or as a straight vertical antenna. For best results use a counterpoise for the lower frequencies.
Palomar Engineers Magnetic Longwire Balun has been redesigned for shortwave listeners and others needing to match a long wire antenna to 50/75 ohm coax feed line cable.
Specifications: Frequency: 100 KHz – 30 MHz. Input: 50/75 ohms for coaxial cable. Output: High impedance. Connector: SO-239 (for cable) wingnut/solder lug for wire lead (for antenna). Mounting: Stainless steel eyebolt. Size: 2.5” diameter. Case: White PVC sealed weatherproof. External ground bolt with wing nut for external counterpoise or separate ground.
The long wire antenna often has a high impedance in the 500-1000 ohm range and the MLB-2 transforms this high impedance close to 50/75 ohms efficiently coupling the received signal to the receiver. A long wire antenna with a matching unit such as the MLB-2 often has a 12 db (2 “S” units) better signal than a long wire without a matching unit.
For best results use a coax noise filter at the receiver end of the coax to reduce common mode noise picked up by the coax braid. Model # CMNF-500-50 is best suited for this antenna.
