Phoenix 4m Dipole

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This 4m dipole was designed as a club project for the Phoenix Radio Club to use with a bulk purchase of 4m converted "PMR" radios. No claim is made as to the originality of the basic design- a dipole is a dipole- although the design has been engineered for easy assembly and to give repeatable results.

More information - https://www.dxzone.com/cgi-bin/dir/jump.cgi?ID=33089

Solder-up PL259 Connectors for RG174

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RG174 is a thin co-axial cable that is popular for lightweight portable HF antennas. However finding solderable connectors for this cable is often quite a challenge. After a long search for a suitable product, SOTABEAMS now stocks such a connector. The connector works with a variety of other thin co-ax cable types including LM100.

Solder-up PL259 Connectors for RG174

Solder-up PL259 Connectors for RG174

SDRplay Releases RSPduo High Performance Dual Tuner

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SDRPlay have recently annouced there latest product at Dayton Hamvention - RSPduo, a high performance dual tuner.

Architecturally different from any previous RSP, the RSPduo features dual independent tuners, both piped through a single high-speed USB 2.0 interface.

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The SDRplay RSPduo is a dual-tuner wideband full featured 14-bit SDR which covers the entire RF spectrum from 1kHz to 2GHz giving 10MHz of spectrum visibility. Initially using Windows based  ‘SDRuno’ supplied by SDRplay, you can simultaneously monitor two completely separate 2MHz bands of spectrum anywhere between 1kHz and 2GHz.

Superficially the RSPduo looks identical to the highly popular RSP2pro and will be able to operate in a very similar way. However, it also allows a completely new and exciting set of usage scenarios such as:

1. Simultaneous monitoring of two widely spaced bands – e.g. 40m (HF) and 2m (VHF)
2. Mixing and matching applications simultaneously – e.g. ADS-B and ATC scanning
3. Phase and time coherent demodulation of two receivers

Scenario 3 is very difficult to achieve with two separate USB devices because of the uncertainty of USB latency. The RSPduo overcomes this limitation because all traffic goes through a single USB interface, thus enabling the possibility of the development of various types of diversity demodulation such as: spatial, frequency and polarisation which can bring huge benefits in terms of improved performance.