Six Band Filter-Combiner

Introducing the Six-Band Filter-Combiner

What it Does

  • The Six-Band Filter-Combiner (6BFC) is designed to take six 1W signals on the 80, 40, 30, 20, 15, and 10-meter amateur bands, and combine them onto a single antenna port. Each channel is filtered to reduce harmonics.

Why

  • The 6BFC was developed for use with the WSPRSONDE, which provides multiple WSPR or FST4W signals, simultaneously on multiple bands. Rather than requiring different antennas, the 6BFC allows the use of a single multi-band antenna. The frequency-flexible outputs of the WSPRSONDE are square-waves (with strong harmonics), the 6BFC filtering attenuates these harmonics, resulting in a spectrally clean output signal.

Dimensions

The 6BFC is housed in a small aluminum enclosure:

8.5 cm wide x 3.5 cm high x 12 cm deep (this includes the connectors)

Weight: 180 gm.

Connections

  • Ports 1-6
  • -40 dB monitor, connected to the Antenna port.
  • Antenna

All connectors are SMA jacks.

Performance

  • Input to Antenna loss: 1.5 db typical.
  • Input port-to-port isolation: typically better than 20 dB
  • Second harmonic attenuation: Better than 40 dB
  • Third harmonic attenuation: Better than 60 dB

When used with the WSPRSONDE, all transmitted harmonics are lower than -50 dBc.

The 6BFC can be used with other transmitters of 1W or lower power. see the manual for further information:

6BFC Manual v0.1Download

To purchase:

https://turnislandsystems.com/product/six-band-filter-combiner