[Elecraft] Modifying Wattmeter Slugs for QRP

[Arthur Delibert]

I have a Bird wattmeter that I'd like to use with QRP rigs.  As best I can tell, though, Bird did not make slugs smaller than 50 watts for the 2-30 MHz range.

There is a website that discusses how to open a Bird slug and modify it for a different power level and/or frequency range.  [http://www.hayseed.net/~jpk5lad/BIRD%20Slugs/birdslug1.htm]

I'm wondering if anyone has tried to modify, say, a 2-30MHz/50-watt slug for 10 watts and if so, any experience to share?  What was the right resistor value?  How was the linearity of the meter with the modified slug?

Thanks for any experience or insights.

Art Delibert
KB3FJO