[Heath] HM-2103 RF load help or thoughts

[Dave Edwards]

I have one of these dummy load/wattmeters.
The wattmeter is WAY off as far as accuracy.
I decided to go through the alignment.
What supposed to be a deep null in the balanced bridge
circuit, when adjusting a ceramic trimmer cap...is just a slight null.
Floating around in the cabinet, I found a half moon shaped oval piece of
something. It seems to be a broken off piece of the wiper half of the
trimmer cap!
So...putting two and two together, I suspect the trimmer cap!!! (Rocket 
Science!)
It is a 3 lead 2 - 18.5 pF ceramic trimmer.
The closest I can find is 5 - 30 pF
As a group....before I spend the cash, and gut the thing....Do you
think that is enough in the ballpark that it will work??
OR...

Anyone have a 2 -18.5 ceramic trimmer?
Heath PN 31-53   or    31-57

Thanks for spinning your wheels on this.

Happy Holidays!
Dave
KD2E
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