OUR PRODUCTS

MODEL TRX-9
9:1 Receive Antenna Transformer

The AY Technologies TRX-9 Receive Antenna Transformer is an optimized design for accurate impedance transformation, low loss and rugged construction. The 9:1 impedance ratio is ideal for Beverages, K9AY loops and other antennas with feedpoint impedances in the 300-1000 ohm range (see specifications below). Separate primary and secondary windings permit separate grounding of antenna and feedline, and make it easy to obtain the necessary 180-degree phasing for "backfire" feeding of inline or staggered phased arrays.

Specifications
Impedance transformation: 9:1 (output vs. input impedance)
    50 ohm feedline — 450 ohm optimum load impedance; 300-675 ohms with 1.5:1 VSWR
    75 ohm feedline — 675 ohm optimum load impedance; 450-1000 ohms with 1.5:1 VSWR
Bandwidth: Optimized for 1.8-7.3 MHz, usable from below 1 MHz to above 30 MHz
Loss: 0.25 dB typical
Antenna connection: Red/Black color-coded binding posts
Coax connection: SO-239, with body connected to mounting flange
Surge protection: Gas tube spark gap, 75-volt breakover, 1 pF capacitance

Circuit Diagram

Instructions
For a typical Beverage installation, connect the antenna to the Red binding posts, and the ground connection to both the Black binding post and mounting bracket. Connect either 50-ohm or 75-ohm coaxial feedline to the SO-239 connector. For phased arrays, 180-degree phasing can be accomplished by reversing the Red and Black connections. If you want an isolated feedline, do not ground the mounting bracket; just ground one of the binding post connections. Always be sure that one of the binding post connections is grounded — the surge protector will not function without grounding!

Click Here for Prices and Ordering Information

back to PRODUCTS page