Manuals

http://www.ets-lindgren.com/sites/etsauthor/SiteCollectionDocuments/Manuals/Antennas/6502.pdf

Specifications

http://www.ets-lindgren.com/products/antennas/loops/4009/400901

Leaflet

https://www.mdltechnologies.co.uk/technical-docs/6502.pdf

Sellers

http://www.distek.ro/en/Product/Active-Receiving-Loop-Antenna-10-kHz..30-MHz-ETS-Lindgren-6502-1649

https://www.emctest.it/index.php?l=strumentazione&cat=ETS+LINDGREN+-+EMCO

https://www.ntecusa.com/Test-Equipment-Sales/Antenna/EMCO-6502/DEF7AA39E4DA141E0417B7E52D819540

ETS-LINDGREN Active antenna 6502  features

Frequency Minimum    9 kHz

Frequency Maximum 30 MHz

1 dB Comp. Point 5 V/m

Connectors BNC (f)

Dynamic Range 125 dB @ 1 MHz

85dB @ 10 kHz

Impedance (Nominal) 50 Ω

Pattern Type omnidirectional

Polarization linear

Sensitivity (Typical)-1 dB(µA/m) @ 10 kHz

-42 dB(µA/m) @ 1 MHz

Two 6-VDC batteries, sealed lead-acid batteries

Height 67.3 cm   (26.50 inches)

Length 12 cm   (4.72 inches)

Weight 2 kg   ( 4.41 lb )

Width 19 cm   (7.48 inches)

The Model 6502 is not designed to operate using the battery charger as a power source.
When the batteries are completely discharged, charging time is approximately eight hours. Batteries should provide power for approximately 16 hours before recharging is required.

Power Indicator
Illuminates to show that the loop is on and
functional. When the charge on the battery decreases to the point that
the antenna calibration is no longer valid, the LED will go dark.
However, the antenna will still function and provide reasonable output
signals until the batteries are spent.

Saturation indicator
Illuminates when input signal intensity exceeds the 1 dB compression level of 5 volts per meter (Model 6502) to 10 volts per meter (Model 6507), and will remain illuminated for about 1 second.