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<DIV>Exactly duplicates my Munin experience (Excluding XYL
assistance). The board was pitted under the 470 pf capacitor.
I replaced the caps with 4-220 pf/500v caps and rewound L4 (Thanks to Don
Waddle for the teflon wire) and got 100 w on all bands except 6 m which had only
50 w output. I am using Gerd’s Penolpe exciter board.</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> Wednesday, January 15, 2014 11:10 PM</DIV>
<DIV><B>To:</B> <A title=hpsdr@lists.openhpsdr.org
href="mailto:hpsdr@lists.openhpsdr.org">hpsdr@lists.openhpsdr.org</A> </DIV>
<DIV><B>Subject:</B> [hpsdr] Munin - improved results
(C25/C26/C27)</DIV></DIV></DIV>
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style="FONT-SIZE: small; FONT-FAMILY: 'Calibri'; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; TEXT-DECORATION: none; DISPLAY: inline">*****
High Performance Software Defined Radio Discussion List *****<BR><BR>
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style="FONT-SIZE: 12pt; FONT-FAMILY: helveticaneue, helvetica neue, helvetica, arial, lucida grande, sans-serif; COLOR: #000; BACKGROUND-COLOR: #fff">
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<DIV
style="FONT-SIZE: 16px; FONT-FAMILY: helveticaneue,helvetica neue,helvetica,arial,lucida grande,sans-serif; COLOR: rgb(0,0,0); FONT-STYLE: normal; BACKGROUND-COLOR: transparent">I
removed my brass tube version of transformer L4, and using replacement teflon
wire generously sent by Don Waddel, and braid from RG-8X, my XYL rewound L4 to
look like what was intended. She did a perfect job of course (compared to my 5
botched attempts). The new transformer made the performance much worse, 100w on
80m, a few watts on 10m, and virtually no power out on 6m.<BR></DIV>
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style="FONT-SIZE: 16px; FONT-FAMILY: helveticaneue,helvetica neue,helvetica,arial,lucida grande,sans-serif; COLOR: rgb(0,0,0); FONT-STYLE: normal; BACKGROUND-COLOR: transparent"> </DIV>
<DIV
style="FONT-SIZE: 16px; FONT-FAMILY: helveticaneue,helvetica neue,helvetica,arial,lucida grande,sans-serif; COLOR: rgb(0,0,0); FONT-STYLE: normal; BACKGROUND-COLOR: transparent">Then
replaced C25/C26/C27 with four 220p / 500V capacitors. In removing C27 (the 470p
capacitor) I noticed what looked like a crater in it. Desoldering, it came off
the board in two pieces, and there was a burned spot on the PC board underneath
(where the 'crater' apparently went all the way through the capacitor). The cap
was cleanly cracked all the way through. <BR></DIV>
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seems to have completely fixed the problems. Am getting 100 watts peak (using
two tone test) 80m - 6m with good looking two-tone waveforms (no
compression).<BR></DIV>
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Tom, N5EG</DIV>
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