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The EM-6889 passive electric field rod antenna is a broadband E-Field monopole operating over 1kHz-50MHz, but only calibrated for emissions over the range 9kHz to 30MHz, due to the uncertainty. It can function as either a transmitting or receiving antenna. It is supplied with a 41” telescopic rod and normally a 2ft square counterpoise (groundplane). The broad range is covered by a bandswitch at 5MHz. Similar device to item 323 but with an extended frequency range. Do not change range with power applied.