Activation of the Bias tee in gr-iridium about gr-iridium HOT 3 OPEN

i have the same issue with hackrf

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did you try just passing bias=1 in the device string?
like for example, in your conf:

device_args='rtl=0,bias=1'

that's worked for me just fine using an rtl-sdr dongle.

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No, it doesn´t work with hackrf, i´m stating to think that my Hackrf doesn´t work.

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