I thank you all for your input and suggestions. Your time is greatly appreciated! I also did some research on "fluctuating flame" in the archives here on LE, and learned quite a bit. So here is a bit of what I learned.
Check list with results:
1. Propane - Ample - Ck
2. Adjust pressure inside concentrator - Ck
3. Compensate for internal adjustment of concentrator pressure on external knobs - Ck
4. Test for leaks at ALL connections and hoses - found one leaky connection to concentrator. Tightened, but did not remedy the fluctuting flame.
5. Adjusted oxygen and propane knobs to get a sub standard flame - Ck - Still fluctuates
6. Wrapped propane tank up in swimming pool grade thermal bubble wrap. Placed upside down trash can over propane tank. Put a carpet under the tank. - Ck
7. Increased the psi to about 6-7. - Ck - Have acheived a somewhat steady neutral flame.
8. After turning the torch off and then back on an hour later. Same fluctuation is back. Not sure what happened
