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The RFA1 allows continuous one-button tuning over a relatively large frequency range thanks to its microprocessor design without the need to manually switch between ranges or to switch antenna modules. An illuminated LC display is installed for display purposes (version A). Version B is designed without operating elements for outdoor operation with remote power supply and control via the RF cable.
The RFAxA is designed for indoor operation in a highly noisy environment. It can either be supplied with power autonomously from an installable battery, a DC hollow pin socket or via the RF cable. Using the power supply via the cable allows for remote control of the tuning and quality setting from a control unit or suitable receivers.
The reception voltage of the built-in ferrite rod is amplified with a low-noise amplifier (SFET/OpAmp cascode) and output to a standard 50 Ohm BNC connection. A quality multiplier circuit allows the bandwidth and output level to be varied.
The housing is made of robust ABS with an anodized and printed aluminum front panel (version A only). The coil of the ferrite rod and the electronics are shielded internally.
The RFA1 operates with 55 g of ferrite material. When compared with other ferrite antennas, the use of material and the achievable frequency range must be considered.
The RFA2 contains 95 g of high-quality ferrite material and improved electronics. It therefore achieves approximately the reception performance of good loop antennas with a diameter of approx. 0.5 - 1 m with considerably smaller dimensions. The frequency range is limited to 137 kHz - 2.0 MHz.
RFA1 no longer in production!
RFA2 currently only available in version B.
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