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<blockquote data-quote="s-band" data-source="post: 972761" data-attributes="member: 407744"><p>Airspy info is confusing as one place it says 50mA but here <a href="http://airspy.com/wp-content/uploads/2014/11/AirSpy_NOS_R2_PinAssignment.jpg" target="_blank">http://airspy.com/wp-content/uploads/2014/11/AirSpy_NOS_R2_PinAssignment.jpg</a> it says 250mA. Maybe they changed the design. I'd just try it, I've drawn 100mA from it.</p><p>I haven't looked closely at the LNA for all but it seems to have multiple configuration options. Use the output LNA's bias tee and feed DC from there to the supply in of the 1st LNA. Check with the vendor how to configure them.</p><p>Filter is passive. It looks like he's used a Mini-circuits LPF/HPF combination</p></blockquote><p></p>
[QUOTE="s-band, post: 972761, member: 407744"] Airspy info is confusing as one place it says 50mA but here [URL]http://airspy.com/wp-content/uploads/2014/11/AirSpy_NOS_R2_PinAssignment.jpg[/URL] it says 250mA. Maybe they changed the design. I'd just try it, I've drawn 100mA from it. I haven't looked closely at the LNA for all but it seems to have multiple configuration options. Use the output LNA's bias tee and feed DC from there to the supply in of the 1st LNA. Check with the vendor how to configure them. Filter is passive. It looks like he's used a Mini-circuits LPF/HPF combination [/QUOTE]
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