<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt">Try changing the cap out with the one you have - yes, definitely worth a try<br><br>I have some ceramic trimmers but I think my 'low C' ones are 2 to 11 pF. I'll spend some quality time in the basement looking this afternoon.<br><br>Bob Groh<br><div><span><br></span></div><div><br></div> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div dir="ltr"> <hr size="1"> <font face="Arial" size="2"> <b><span style="font-weight:bold;">From:</span></b> Dave Edwards <kd2e@comcast.net><br> <b><span style="font-weight: bold;">To:</span></b> Heath@puck.nether.net <br> <b><span style="font-weight: bold;">Sent:</span></b> Friday, December 27, 2013 7:45 AM<br> <b><span style="font-weight:
bold;">Subject:</span></b> [Heath] HM-2103 RF load help or thoughts<br> </font> </div> <div class="y_msg_container"><br>
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I have one of these dummy load/wattmeters. <br>
The wattmeter is WAY off as far as accuracy. <br>
I decided to go through the alignment.<br>
What supposed to be a deep null in the balanced bridge <br>
circuit, when adjusting a ceramic trimmer cap...is just a slight
null. <br>
Floating around in the cabinet, I found a half moon shaped oval
piece of <br>
something. It seems to be a broken off piece of the wiper half of
the <br>
trimmer cap!<br>
So...putting two and two together, I suspect the trimmer cap!!!
(Rocket Science!)<br>
It is a 3 lead 2 - 18.5 pF ceramic trimmer. <br>
The closest I can find is 5 - 30 pF<br>
As a group....before I spend the cash, and gut the thing....Do you <br>
think that is enough in the ballpark that it will work??<br>
OR...<br>
<br>
Anyone have a 2 -18.5 ceramic trimmer?<br>
Heath PN 31-53 or 31-57<br>
<br>
Thanks for spinning your wheels on this.<br>
<br>
Happy Holidays!<br>
Dave<br>
KD2E<br>
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