Jim,
I have the Hardrock 50 and while it's NOT 100W it does exceed 50W on each band by a decent margin. It's a solder kit (no fan) and a relatively easy build. The build instructions aren't great and up to Elecraft standards but good enough to get the job done especially if you've done a few solder kit builds. It's great for portable ops especially when operating on battery power. A lot less power draw AND less than an S unit in difference on the "far end". Works great so far and I finished the build just over a year ago. I have no idea if they are in stock at the Hardrock 50 website (link below).
https://www.hobbypcb.com/index.php/products/hf-radio/hardrock-50-hf-power-amp

As to out of stock items at Elecraft I tried to purchase 2 KIO3B's and a KPA100 (someone at Elecraft can do the math on lost sales). And from the sales department over two weeks ago... yep you guessed it... OUT OF STOCK. And NO I wasn't willing to give Elecraft $$$ for some vague shipping timeframe in the future. Why you ask? I was ripped off in the past by a company "I trusted" and they subsequently went bankrupt and I never got my money back or the product ordered. Bottom line: I don't prepay for anything. If the product is in stock and I want it, then I'll buy it.

Good luck on your hunt for an alternative AMP.

73,
Scott AD5HS


On 5/25/2020 9:31 PM, HamRadioJim wrote:
I have a KX3 and looking for an AMP (besides the elecraft brand) that is 100
watts or more that will work flawlessly with it.

I ordered the 100 amp from elecraft, but have been waiting over two months
for it, but they are out of stock and will be for some time.

Has anyone purchased something else and has used it for a while with really
good results?  If you have not tested or used an alternative AMP for the
KX3, please don't respond to the post.  Just looking for those who have
actual results instead of suggestions.  Greatly appreciated.  Thank you.

-73



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