Meet 'Balun One Nine', a small, cost-effective balun. An excellent way to attach a long wire antenna to the Ham It Up, this 1:9 balun has an SMA output port and high-quality spring-type terminal block input for your coax.

Balun One Nine includes an AntennaGuard varistor on the input, protecting your SDR setup from spurious ESD. The ESD protection is excellent--it passes IEC61000-4-2, an 8kV contact discharge test, with a response time of just 300ps.

At 39.2mm x 13.0mm in total size (including connectors!) this balun was designed to be light in weight and light on your wallet.

Very low insertion loss of -1.3dB (typical), with a maximum input power of +28dBm. Designed primarily for 160m-6m amateur bands, but specifications are accurate to frequencies up to 90MHz+.

 

Balun One Nine - Schematic

 

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Balun One Nine Schematic

 

Balun One Nine - VNA Sweep to 150MHz

 

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Back to back VNA sweep of two baluns shows that one Balun has Return Loss (S11) >-10dB (VSWR<2) between 1MHz and 54MHz with Insertion Loss (S21) <1.5dB (divide by two to get loss of one balun). It covers the 160m to 6m amateur bands.

 

Balun One Nine - VNA Sweep to 1300MHz

 

(Size: 24.4 KB)

Back to back VNA sweep of two baluns shows that one Balun has Return Loss (S11) >-10dB (VSWR<2) between 1MHz and 54MHz with Insertion Loss (S21) <1.5dB (divide by two to get loss of one balun). It covers the 160m to 6m amateur bands.