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<DIV>Hi Chris</DIV>
<DIV> </DIV>
<DIV>In my personal opinion the SB620 is one of the very few units that Heathkit
did not get quite right. All example photos that I see with signals displayed
show severe signs of slew rate distortion - too high a scan speed for the
IF bandwidth. For displaying general band activity the '620 IF
bandwidth is too narrow.</DIV>
<DIV> </DIV>
<DIV>The solution is not technically difficult but the internal component
arrangement makes changes difficult so I propose the re-engineer my SB620 to
make it more flexible and increase the vertical dynamic range.</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 00:02:36 GMT Standard Time,
ckepus@comcast.net 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>Pete,<BR><BR>Thanks for bursting my bubble of ignorant enthusiasm
for getting my 620 up<BR>and running with * (* = anything it could possibly be
hooked up to).<BR><chagrined grin><BR><BR>Not ever seeing one of these
in action, I presumed there would be more<BR>excitement and useful purpose
generated than "generally worthless". Having<BR>read your posts over the
years, it is unlikely you are inaccurate. <BR><BR>Is there any point to
putting the time/money in one of these other than the<BR>value of eye candy?
(Pete or anyone, please)<BR><BR>73,<BR>Chris<BR>W7JPG<BR><BR><BR>-----Original
Message-----<BR>From: Heath [mailto:heath-bounces@puck.nether.net] On Behalf
Of<BR>pmarkavage@juno.com<BR>Sent: Thursday, September 12, 2013 10:09
AM<BR>To: wrcromwell@gmail.com<BR>Cc: heath@puck.nether.net<BR>Subject: Re:
[Heath] SB-620?<BR><BR>I connected my 3395 KHz IF SB-620 to my R-599D years
ago. The signal coming<BR>out at the tap point was to low to really see any
trace action.<BR>Had to build a voltage amplifier (several transistors) on to
a small perf<BR>board and mounted it in the 599D. Nice eye candy, but
generally worthless<BR>for HF activity.<BR><BR>Pete,
wa2cwa<BR>http://www.manualman.com<BR><BR>On Wed, 11 Sep 2013 21:44:21 -0400
Bill Cromwell <wrcromwell@gmail.com><BR>writes:<BR>> On 09/11/2013
06:52 PM, George Babits wrote:<BR>> > Thanks to all who responded.
I now have a manual that will help<BR>> me<BR>> > get things figured
out.<BR>> ><BR>> > 73,<BR>> > George<BR>> >
W7HDL<BR>> I have one of those here that I should connect to my Kenwood
Twins <BR>> (the receiver of course). Mine just happens to be on the
"Heathkit" <BR>> 3395 IF and so are the Twins. Whaddaya know!<BR>>
<BR>> 73,<BR>> <BR>> Bill
KU8H<BR><BR>_______________________________________________<BR>Heath mailing
list<BR>Heath@puck.nether.net<BR>https://puck.nether.net/mailman/listinfo/heath<BR><BR>_______________________________________________<BR>Heath
mailing
list<BR>Heath@puck.nether.net<BR>https://puck.nether.net/mailman/listinfo/heath<BR></FONT></BLOCKQUOTE></DIV></FONT></DIV></FONT></BODY></HTML>