UBBV-NF 25

The Aaronia UBBV-NF 25 is a low-frequency preamplifier covering 1 Hz to 50 MHz (with usable response to 60 MHz at -3 dB), designed for near-field and low-frequency signal measurements where a high-impedance input is essential. With a 100 kΩ SMA input impedance — rather than the standard 50 Ω — it is optimised for use with high-impedance probes, sensors, and antennas operating at audio and sub-RF frequencies.

Key specifications include a typical gain of 25 dB, a maximum input DC voltage of 10 VDC, a maximum input AC voltage of 3 V (2.1 V rms), and a maximum output power of +15 dBm into 50 Ω. The output uses a standard 50 Ω SMA male connector, making it compatible with any spectrum analyzer. Supported applications include near-field EMC measurements, low-frequency emissions testing, and general sub-50 MHz signal amplification.

Each unit is developed, produced, and calibrated in Germany at the Aaronia factory. It ships with an aluminum transport case, international power supply with adapters, SMA tool, and manual. Weight is 146 g with dimensions of 81 × 61 × 29 mm.