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<DIV>Graham</DIV>
<DIV> </DIV>
<DIV>Comments below:</DIV>
<DIV> </DIV>
<DIV>In a message dated 2/6/2009 6:05:49 P.M. Eastern Standard Time,
KE9H@austin.rr.com writes:</DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><FONT
style="BACKGROUND-COLOR: transparent" face=Arial color=#000000 size=2>*****
High Performance Software Defined Radio Discussion List
*****<BR><BR>All:<BR><BR>Before I do a layout of the (hopefully)
final<BR>version of PennyWhistle, I would like to call<BR>for
comments.<BR><BR>If this is something you would be interested in,<BR>please
review...<BR><BR>http://hpsdr.org/wiki/index.php?title=PENNYWHISTLE<BR><BR>It
has been updated with an "off the shelf" output<BR>transformer from
Communications Concepts, as well<BR>as the power output versus frequency plots
have<BR>been added.<BR><BR>Questions:<BR><BR>Do you prefer BNC versus the SMA
connectors shown?</FONT></BLOCKQUOTE>
<DIV>No preference here, whichever is more convenient.</DIV>
<DIV> </DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><FONT
style="BACKGROUND-COLOR: transparent" face=Arial color=#000000
size=2><BR><BR>Considering the differences in power output at<BR>6 Meters
versus HF, should a relay be added that<BR>would switch the output peaking
between HF and<BR>6 Meters, or is the performance with a fixed<BR>capacitor at
one setting or the other adequate<BR>for your purposes? (that is,
keep it simple)</FONT></BLOCKQUOTE>
<DIV>I prefer "keep it simple", can the output power be maintained</DIV>
<DIV>with proper linearity using PA settings in setup? </DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><FONT
style="BACKGROUND-COLOR: transparent" face=Arial color=#000000
size=2><BR><BR>Is a bare board kit preferable if it saves multiple<BR>months
for availability? Are you comfortable<BR>building a kit with about two
dozen SMT parts?</FONT></BLOCKQUOTE>
<DIV>Assembling SMT boards should not be a problem here.</DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><FONT
style="BACKGROUND-COLOR: transparent" face=Arial color=#000000
size=2><BR><BR>I have a suggestion from Phil H to add a feedback<BR>winding to
(optionally) reduce gain and increase linearity<BR>when used as a driver for
linears.</FONT></BLOCKQUOTE>
<DIV>Good idea!</DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><FONT
style="BACKGROUND-COLOR: transparent" face=Arial color=#000000
size=2><BR><BR>I have a suggestion from Lyle J. to try the RD15HVF1<BR>in
place of the RD16HFF1 transistors to increase<BR>performance at 6
Meters.</FONT></BLOCKQUOTE>
<DIV>RE: comments about the relay vs PA settings to maintain </DIV>
<DIV>output power.</DIV>
<DIV> </DIV>
<DIV>Thanks for the effort.</DIV>
<DIV> </DIV>
<DIV>73 de Joe K1RQG</DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><FONT
style="BACKGROUND-COLOR: transparent" face=Arial color=#000000
size=2><BR><BR>--- Graham / KE9H<BR><BR><BR></FONT></BLOCKQUOTE>
<DIV></DIV>
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