So, I discovered the noise problem. Chain was stretched, cog was worn. I changed out the cog and driver, chainring and chain for 1/2 pitch parts. No more noise.
Thanks Cabers for all the tips and suggestions.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.