RF diplexer / triplexer

RF bandpass filterCross Country Wireless produce a range of high performance RF diplexers and triplexers.

Our products cover four different amateur radio applications.
One splits a single multi-band antenna feed into separate feeds for HF -144 MHz and 432 MHz equipments.
The second is specifically designed for use with the Yaesu FT-8900R quad band transceiver to allow the use of separate 144/432 MHz and 28/50 MHz antennas.
The third is again specifically designed for use with the FT-8900R quad band transceiver to allow the use of a 50+144+432 MHz triband antenna and a 28 MHz antenna.
The triplexer is specifically designed to allow the use of a 50+144+432 MHz triband antenna with a multiband transceiver such as the Yaesu FT-100D, FT-897 or similar.

We have designed a duplexer to work with the Duoband antennas made by Vine Antennas. Click here for more details on Duoband antennas.

  • High performance CAD designed diplexer using 8 pole Chebyshev high pass and low pass filters

  • Ideal for SOTA, RAYNET, ARES or RACES for fixed, mobile or portable stations operating multi-band transceivers

  • Passband insertion loss <1 dB (typically 0.45 dB)

  • Isolation better than -50 dB (typically -55 to -60 dB)

  • 100 Watts RF max

  • Lightning surge arrestor built in for added protection

  • N type female connectors

  • Black coated aluminium case sealed with a rubber gasket to IP65 standard (dust tight and protected against water jets)

  • RoHS certified free from certain hazardous substances banned by the EU

  • Each diplexer is supplied with a test certificate detailing its RF and VSWR performance

  • Carefully made in the UK

  • Click here for a frequency and isolation plot of a typical HF to 144 MHz and 432 MHz diplexer.

    Please note before ordering that all diplexers / triplexers are usually built to order. Dispatch can be up to two weeks after order.

    When ordering please state the type of RF connectors required (N type females, N type male/female, S0239, BNC female or TNC female).

    You can order by Paypal...

    Frequency range
    or by Google Checkout...

    Here is some recent feedback from our eBay customers who bought a diplexer from us:

    High Quality item and good service. Buy from with confidence. A++++ Buyer: g0tmx ( 99 )

    Excellent products, excellent service - comes highly recommended - thank you! Buyer: g0vrm ( 61 )

    RF bandpass filter under testThe 144 / 432MHz prototype diplexer was soak tested and is still running on the APRS Igate MB7UBN after 2 years continuous service. The Igate runs 24/7 providing APRS coverage to a large area of NW England around Bolton, Manchester and Warrington. The diplexer with it's original grey case is in the bottom left of the photograph directly connected to the Heliax coaxial cable from the dual band colinear antenna.

    See our eBay shop for details on how to buy our diplexer and filter products.

    If you require more detailed information or need a special one-off diplexer or filter please contact us by email at info@crosscountrywireless.net or phone +44(0)1204 410626 or +44(0)7752 391908.



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