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<DIV>Hi Ken</DIV>
<DIV> </DIV>
<DIV>Thanks for your comments. I will post the data on my technical website when
completed but at the moment I am repackaging some power supplies into SB600
boxes and one of them is a real challenge.</DIV>
<DIV> </DIV>
<DIV>I worked out a series of mods for both the SB610 and SB620 to significantly
improve their functionality.</DIV>
<DIV> </DIV>
<DIV><FONT lang=0 size=2 face=Arial FAMILY="SANSSERIF"
PTSIZE="10">73<BR></FONT><FONT lang=0 color=#0000ff size=4 face=Arial
FAMILY="SANSSERIF" PTSIZE="14"><I><BR>Bob</FONT><FONT lang=0 color=#000000
size=2 face=Arial FAMILY="SANSSERIF" PTSIZE="10"></I><BR>Bob F Burns G3OOU<BR>C
Eng, FIET, MSE<BR>G-QRP 6907<BR>Secretary of Crystal Palace Radio &
Electronics Club: www.g3oou.co.uk<BR>Technical web site:
www.qsl.net/g3oou<BR>@BobFBurns on Twitter: http://twitter.com/BobFBurns
<DIV> </DIV>
<DIV>
<DIV>In a message dated 13/09/2013 17:57:49 GMT Standard Time,
kgordon2006@frontier.com writes:</DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><FONT
style="BACKGROUND-COLOR: transparent" color=#000000 size=2 face=Arial>On 13
Sep 2013 at 4:28, G3OOU@aol.com wrote:<BR><BR>> <BR>> Hi Chris<BR>>
<BR>> In my personal opinion the SB620 is one of the very few units that
Heathkit did not get quite right. <BR>> All example photos that I see with
signals displayed show severe signs of slew rate distortion - too <BR>>
high a scan speed for the IFbandwidth.<BR><BR>Indeed! This is why I always use
as slow scan speed as I can manage when doing "visual" <BR>alignments of IF
strips.<BR><BR>> For displaying general band activity the '620 IF bandwidth
<BR>> is too narrow.<BR><BR>Again, agreed.<BR><BR>> The solution is not
technically difficult but the internal component arrangement makes changes
<BR>> difficult so I propose the re-engineer my SB620 to make it more
flexible and increase the vertical <BR>> dynamic range.<BR><BR>Wel, I, for
one, would be very interested in your solutions, Bob. Your work has always
<BR>impressed me.<BR><BR>vy 73,<BR><BR>Ken
W7EKB<BR></FONT></BLOCKQUOTE></DIV></FONT></DIV></FONT></BODY></HTML>