100K-50MHz RTL-SDR Supporting long Antenna 9:1 Impedance Transformer Balun BNC
RTL-SDR supporting long- antenna 9:1 impedance transformer (BALUN). Connectors with BNC.
Frequency : 100K-50MHz. Compact, easy accessibility, and QRP stations set up for outdoor use .
( Note: do long-term outdoor use , you must use the shell silicone adhesive sealing the upper and lower lid to make processed )
Only impedance transformer , excluding long- wire antenna . Wires can use various existing wire.
The length of the actual environment set up, to be used at both ends of the insulator .
1 x 9: 1 impedance transformer (BALUN) Connect with BNC connector