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<DIV>In a message dated 25/04/2011 19:47:11 GMT Standard Time,
TDavid@industrialcoating.com writes:</DIV>
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<P class=MsoNormal>A DX-40 question – the DX-40 I recently acquired has a 20uF
cap from pin 1 of the 6DE7 to the chassis. The schematic in the
partial manual I have doesn’t show the cap. On the chassis side it
is tied to a solder lug so it appears that some thought was given to
installing it. Can someone with a later diagram confirm if it is
correctly installed or, if not, where it should be
connected? </P>
<P class=MsoNormal>Thanks for the help!<o:p> </o:p></P>
<P class=MsoNormal>Dave Cohen, N7TC<o:p></o:p></P></FONT></BLOCKQUOTE></DIV>
<DIV>Hi Dave</DIV>
<DIV> </DIV>
<DIV>My DX40 schematic shows an 0.02uF capacitor from pin 1 of V4 to ground but
no date or version number on the sheet. Your 20uF capacitor might be an attempt
at additional decoupling in conjunction with R21 (1K). The DC is shown as +380V
at pin 1 of V4 and this will contain an audio component during
modulation.</DIV></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<BR>C Eng,
FIET, MSE<BR>Amateur Radio Callsign: G3OOU<BR>Registered RSGB
Instructor<BR>G-QRP Member No: 6907; Zone: 14, QRA: IO91WH; WAB:
TQ25<BR>Secretary of Crystal Palace Radio & Electronics Club: <A href="http://www.g3oou.co.uk/">www.g3oou.co.uk</A><BR>Technical web site: <A href="http://www.qsl.net/g3oou">www.qsl.net/g3oou</A></FONT></DIV></FONT></BODY></HTML>