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<DIV>Hi Tom & Tony,</DIV>
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<DIV>My Munin is mounted in the Pandora enclosure so I can’t get a photo without
disassembling everything. My Penelope exciter could only drive Munin to 50
watts on 6 m. The caps failed while testing on 6 m. I replaced all 4
with new 220 pf units. I don’t plan to use on 6 m so I did not
troubleshoot further. The rf current through each of the 220 pf caps at 50
mhz and 100 watts output will be about 5 amp (if my calc is correct). That
is a lot of current and it could account for the heating.</DIV>
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<DIV>73 de Ken W5KQ</DIV>
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<DIV style="font-color: black"><B>From:</B> <A title=tom.mcdermott4@yahoo.com
href="mailto:tom.mcdermott4@yahoo.com">Tom McDermott</A> </DIV>
<DIV><B>Sent:</B> Saturday, January 18, 2014 11:33 AM</DIV>
<DIV><B>To:</B> <A title=prosdr@gmail.com href="mailto:prosdr@gmail.com">Tony
Hagen</A> ; <A title=kgshutt@cox.net
href="mailto:kgshutt@cox.net">kgshutt@cox.net</A> </DIV>
<DIV><B>Cc:</B> <A title=hpsdr@lists.openhpsdr.org
href="mailto:hpsdr@lists.openhpsdr.org">hpsdr@lists.openhpsdr.org</A> </DIV>
<DIV><B>Subject:</B> Re: Munin</DIV></DIV></DIV>
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<DIV><SPAN>Hi Tony.</SPAN></DIV>
<DIV><SPAN></SPAN> </DIV>
<DIV><SPAN>Here's a couple photos of the suspect area.</SPAN></DIV>
<DIV><SPAN>000 is a picture of the crater in C27, the second is after replacing
C25/C26/C27.</SPAN></DIV>
<DIV><SPAN>Have not checked for heating in the 4 new capacitors. Would need to
setup a fan for the heatsink </SPAN><SPAN>before starting longer term soak
test.</SPAN></DIV>
<DIV><SPAN></SPAN> </DIV>
<DIV><SPAN><A
href="https://www.dropbox.com/sh/9tsredh4l7dduv6/gdVyIqC2sl">https://www.dropbox.com/sh/9tsredh4l7dduv6/gdVyIqC2sl</A></SPAN></DIV>
<DIV><SPAN></SPAN> </DIV>
<DIV><SPAN></SPAN> </DIV>
<DIV>-- Tom, N5EG</DIV>
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readonly="true"></DIV><FONT size=2 face=Arial><B><SPAN
style="FONT-WEIGHT: bold">From:</SPAN></B> Tony Hagen
<prosdr@gmail.com><BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B>
kgshutt@cox.net; tom.mcdermott4@yahoo.com <BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> Friday, January 17, 2014 8:49
PM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> Re:
Munin<BR></FONT></DIV>
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<DIV>Hi,</DIV>
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<DIV>Please do send me a photo of your assembled Board. OH BTW I have not
installed T5 and all which is marked DNI</DIV>
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<DIV style="FONT-SIZE: 10pt; FONT-FAMILY: 'Segoe UI'; COLOR: rgb(0,0,0)">73s<BR
clear=none>Tony</DIV>
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<DIV><B>From:</B> <A title=prosdr@gmail.com href="mailto:prosdr@gmail.com"
shape=rect rel=nofollow target=_blank ymailto="mailto:prosdr@gmail.com">Tony
Hagen</A> </DIV>
<DIV><B>Sent:</B> Saturday, January 18, 2014 10:01 AM</DIV>
<DIV><B>To:</B> <A title=kgshutt@cox.net href="mailto:kgshutt@cox.net"
shape=rect rel=nofollow target=_blank
ymailto="mailto:kgshutt@cox.net">kgshutt@cox.net</A> ; <A
title=tom.mcdermott4@yahoo.com href="mailto:tom.mcdermott4@yahoo.com" shape=rect
rel=nofollow target=_blank
ymailto="mailto:tom.mcdermott4@yahoo.com">tom.mcdermott4@yahoo.com</A> </DIV>
<DIV><B>Subject:</B> Munin</DIV></DIV></DIV></DIV>
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<DIV>Hi Ken and Tom</DIV>
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style="FONT-SIZE: 10pt; FONT-FAMILY: 'Segoe UI'; COLOR: rgb(0,0,0)"> </DIV>
<DIV style="FONT-SIZE: 10pt; FONT-FAMILY: 'Segoe UI'; COLOR: rgb(0,0,0)">I am
also getting identical results with a difference. At 6 metre the capacitors are
heating.</DIV>
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style="FONT-SIZE: 10pt; FONT-FAMILY: 'Segoe UI'; COLOR: rgb(0,0,0)"> </DIV>
<DIV style="FONT-SIZE: 10pt; FONT-FAMILY: 'Segoe UI'; COLOR: rgb(0,0,0)">I am
testing in standalone mode with PTT and jumper shorted. I am using a signal
generator as input to excite.</DIV>
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style="FONT-SIZE: 10pt; FONT-FAMILY: 'Segoe UI'; COLOR: rgb(0,0,0)"> </DIV>
<DIV style="FONT-SIZE: 10pt; FONT-FAMILY: 'Segoe UI'; COLOR: rgb(0,0,0)">Is is
possible to replicate my test setting at your end at 6 metre continuously with
at least 10 minutes in PTT mode – keep checking the temperature of 220pf/500v
capacitor.</DIV>
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style="FONT-SIZE: 10pt; FONT-FAMILY: 'Segoe UI'; COLOR: rgb(0,0,0)"> </DIV>
<DIV style="FONT-SIZE: 10pt; FONT-FAMILY: 'Segoe UI'; COLOR: rgb(0,0,0)">This is
my 2nd munin which I am testing – its not mounted in any enclosure yet so no fan
yet but I am using two identical heatsink during my test</DIV>
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style="FONT-SIZE: 10pt; FONT-FAMILY: 'Segoe UI'; COLOR: rgb(0,0,0)"> </DIV>
<DIV
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Segoe UI'; COLOR: rgb(0,0,0)">73s</DIV>
<DIV
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Segoe UI'; COLOR: rgb(0,0,0)">Tony</DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV><BR><BR></DIV></DIV></DIV></DIV></DIV></DIV></DIV></BODY></HTML>