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<div class="moz-cite-prefix">Or just solder down another 100 ohm SMT
resistor on top of the present 100 ohm, yielding 50 ohms and no
removals.<br>
<br>
73,<br>
<br>
Lyle KK7P<br>
<br>
</div>
<blockquote
cite="mid:CAE3hgTfHgq6cYu-yoTN158zM95AsZZ-vRmumd+NZvQHbMVEgPw@mail.gmail.com"
type="cite"><br>
<div class="gmail_quote">On Thu, Mar 14, 2013 at 3:12 PM, Mike
Monnier <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:w8bac@comcast.net" target="_blank">w8bac@comcast.net</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
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name="Compose message area">
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<div>"There was a bad value in the Schmidt-trigger
squaring circuit for the 10MHz reference input. R141,
the emitter resistor of the differential pair, has the
wrong value. It should be 50Ξ©, not 100Ξ©. Change that
an you won't have any problems with using your external
reference.Β "</div>
<div> </div>
<div><font face="Calibri">I see some odd type from time to
time on this reflector. In your post (cut and pasted
above) you are talking about R 141. A resistor I
assume and it should be 50 ohm? Not 100 ohm? Is that
right? </font></div>
</div>
</div>
</blockquote>
<div><br>
</div>
<div>Yes, yes, and yes.</div>
<div> </div>
<blockquote class="gmail_quote" style="margin:0 0 0
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<div><font face="Calibri">I am not able to replace an
SMT component on a 5 layer board. </font></div>
</div>
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</blockquote>
<div><br>
</div>
<div>Why not? Hot-air rework tools are pretty cheap now. This is
what I used:</div>
<div><br>
</div>
<div><a moz-do-not-send="true"
href="http://www.circuitspecialists.com/csihotgun-2.html">http://www.circuitspecialists.com/csihotgun-2.html</a></div>
<div><br>
</div>
<div>You can't go too far wrong for $89. </div>
<div><br>
</div>
<div>Heat up the resistor with the hot-air rework tool; remove
the resistor with tweezers; use an iron and solder wick to get
rid of that wicked, nasty RoHS solder crap; put down a couple
of dabs of good PbSn solder paste; heat again with the hot-air
tool; put it all back together; and go play radio.<br>
</div>
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