Simple SDR Receiver that can receive frequencies up to approximately 30MHz, if an optional Si5351 clock generator is used. Without this, it receives up to about 20MHz, using the ESP32 clock dividers. The circuit is so simple that it can even be built on a breadboard. Tayloe Quadrature Detector circuit on a solderless breadboard Circuit…
IMARUS Newsletter (September 2023) by IARU Reg 1. Read in PDF
This active splitter allows you to split one antenna into multiple RX. The splitter can also be used to split a reference frequency, for example 10MHz. The outputs have high isolation and minimal difference in splitting. The input includes a diode limiter and the preamp gain can be varied by an output attenuator. This 3-way active splitter…
This is small four directional RX antenna for lower HF bands. Ideal for portable use as well as for home installation. Antenna has got Band Pass Filters and Preamplifier in the feed point of the loops. It is advantage of filtering and amplification small signals directly from antenna. Controller is able to control also Bi-directional…
HRO Catalog (Fall / Winter 2023) Download PDF (124 pages)