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<DIV><FONT size=2 face=Arial>I have been spending quite a lot of time operating
on </FONT></DIV>
<DIV><FONT size=2 face=Arial>10m now is open again.</FONT></DIV>
<DIV><FONT size=2 face=Arial>There has always been a higher level of spurious
signals on this band than any other even with Mercury input terminated directly
in 50 ohms.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2 face=Arial>What I am now seeing using Doug's, W5WC
software with zero frequency IF is between about 28.300 and 28.650 a spurious
signal at 0Hz in the receive pass band.</FONT></DIV>
<DIV><FONT size=2 face=Arial>Also I am hearing what sounds like
intermod produced by other signals in the display pass band producing
an audible output. I have see the effect produce by signal of only S7. Also
at the same time I see the 0Hz spurious being modulated by the off frequency S7
signal.</FONT></DIV>
<DIV><FONT size=2 face=Arial>The above applies to Doug's software 1.19.3.4,
1.19.3.5 and 2.2.3.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2 face=Arial>Using Bill's KD5TFD</FONT> <FONT size=2
face=Arial>software with 9Khz IF I see much the same spurious on the
spectrum display but 0Hz spurious is offset by 9Khz and so far have not detected
any unwanted products in the audio output.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Current cards</FONT></DIV>
<DIV><FONT size=2 face=Arial>Mercury V2.9</FONT></DIV>
<DIV><FONT size=2 face=Arial>Pennylane V1.4</FONT></DIV>
<DIV><FONT size=2 face=Arial>Metis V1.4</FONT></DIV>
<DIV><FONT size=2 face=Arial>Excalibur</FONT></DIV>
<DIV><FONT size=2 face=Arial>Alex</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Has anyone else seen this or do I have a one off
problem.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Mike G8ALS</FONT></DIV></BODY></HTML>