HPSDR,<div><br></div><div>OK - have finished building Excalibur and am getting the green LED - and it is up and running on my rig.</div><div><br></div><div>I will calibrate it once I borrow Don's (ARRL Ham of the Year) rubidium standard. But should be +/- 1 Hz as is.</div>
<div><br></div><div>I do have a question - I have noticed 10MHz spurs and harmonics picked up a bit or seemingly have.</div><div><br></div><div>I haven't implemented the extra grounds on Alex yet - does anyone know if I implement those grounds if it'll kill the spurs?</div>
<div><br></div><div>Another question - should the unused I/O on Alex have 50-ohm terminators installed?</div><div><br></div><div>73's,</div><div>John</div><div>AJ6BC</div><div><br></div>