Re: LAA+ FM broadcast interference using SDRplay Bias-T but goes away using 12v Bias-T power inserter?


Chris Moulding
 

Hi Eric,

For the best dynamic range from the head amplifier it is best to feed the amplifier with 12V via an unamplified Bias T. The base unit running off 5 V USB also has an additional amplifier so this may be over-driving your receiver.

If you are using a 1m diameter loop it will be resonant as a full wave quad loop in the VHF FM band. Make the loop larger or smaller to move the resonant frequency.

Regards,

Chris

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