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 3 meter antenna extension, for 18M / 36M / 72M modules
 This extension consists of a 3 meter SMA cable and a magnetic base on which to screw the antenna of the COBRA 18M / 36M / 72M modules.

 With this extension it is possible to position the cobra modules behind obstacles without interrupting the reception of the radio signal.

 The extension is applied directly to the COBRA modules, or to the protective case; it does not require any modification, simply screw the cable to the module or the case, where the antenna is normally screwed, and screw the antenna to the magnetic base.