Off Center Fed (OCF) Antennas

50:450 ohm (9:1) CUBE™ Unun, 150 KHz - 10 MHz, VLF, 1000 Watts PEP

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Product Details

The CU-9-1500VLFN is a 9:1 quad core, Unun housed in a NEMA enclosure box (4″ x 4″ x 2″) with top coax connector output of 450 ohms used to translate a 50 Ω unbalanced coax input to 450 Ω unbalanced output at RF power levels up to 1000 watts PEP when used with a matched load. With a matched 450 ohm load the SWR over the frequency range 100 KHz to 10 MHz is less than 2:1 on the coax input (see graph for SWR at specific frequencies).

Use of the unun at high (>600 ohms) or low (

Input and output connectors are type "N".

Also includes ground lug/wingnut connected to input and output shield connectors.

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OCF antennas are very convenient as they will allow multiple bands of operation with a simple wire antenna which is fed off center with a 4:1 OCF Current balun with built in feed line choke,