The Electro-Metrics EM-6905 41” Active Vertical Antenna includes an amplifier that results in high sensitivity to the electric field in the frequency range of 1 kHz to 200 MHz. The EM-6905 can easily be used with any 50-ohm receiving instrument improving sensitivity over a passive device.

The EM-6905 provides 12 to 14 dB of sensitivity improvement over a Passive Vertical Rod Antenna in the range of 1 kHz to 10 MHz and 3 to 5 dB or more up to 30 MHz.



Frequency Range (calibrated): 1 kHz – 200 MHz
Dynamic Range: Typically 120 dB, 1 µV/m to 1 V/m
Impedance: Designed to drive a 50-ohm load
Saturation Level: Typically 126dB (µV/m) CW, 105 dB (µ V/m/MHz) Broadband
Sensitivity: From –13 dB (µV/m/Hz) at 10kHz to –40 dB (µV/m/ Hz) at 30 MHz, typical normalized to 1 Hz bandwidth
Power Source: External 12 V.D.C. required
Connector: Type SMA (Jack)


Base Dimensions:
Length: 6.35 cm (2 ½”)
Width: 6.35 cm (2 ½”)
Height: 22.1 cm (8 ¾”) (w/collapsed rod)
Length Antenna Rod: Standard: 152.4 cm (60”)
Weight: .22 kg (.48 lb.)
Mounting: Standard ¼ -20 thread
Optional external battery pack available.

Product Sheet