An air-cooled dry dummy load is just fine for 100 W. I like the Oak Hills 
Research RFL-100 kit. $50 and easy to build. It uses twenty 5 W resistors.

http://www.ohr.com/rfl100.htm

I wrote up my build of that kit here.

https://observer.wunderwood.org/2016/12/31/building-a-dummy-load/

If you want to buy instead of build, I’d look at one of the used Bird dummy 
loads listed here. There are other sites, but this one seems to have a good 
selection.

https://www.nm3e.com/loadSampler.htm#LoadSampler

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Jul 1, 2020, at 2:44 PM, NJMike <[email protected]> wrote:
> 
> I need to purchase a dummy load for use with my K2/100.  What's the
> difference between a dry dummy load and an air cooled dummy load?  Which is
> better?
> 
> Thanks,
> Mike NJ2OM
> 
> 
> 
> --
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