These baluns and ununs can be used for impedance matching and also as End Fed halfwave antenna matching transformers to 50 or 75 ohm coax cable.

Elecraft Transceiver RFI Kits

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Elecraft K3/K3S Transceiver RFI Kit - 7 Noise Reduction Filters

Elecraft K3/K3S Transceiver RFI Kit - 7 Noise Reduction Filters

SKU RFI-ELECRAFT-K3

$49.95

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Elecraft K4 Transceiver RFI and Noise Reduction Kit, RFI Range 1-60 MHz, 24 Filters

Elecraft K4 Transceiver RFI and Noise Reduction Kit, RFI Range 1-60 MHz, 24 Filters

SKU RFI-ELECRAFT-K4

$149.95

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Elecraft KX3 Transceiver RFI Kit - 3 Noise Reduction Filters

Elecraft KX3 Transceiver RFI Kit - 3 Noise Reduction Filters

SKU RFI-ELECRAFT-KX3

$19.95

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