TomC wrote:I'd try to repeat the same charge temp, same bean load, leave your damper open at 50-70%. If you're not sailing thru FC before your previous 10 minute mark, it might be inadequate BTU. Your ET held well throughout, so I wouldn't immediately turn my attention to the burners, from that profile at least.
If your repeat profile with dampers opened more (don't get fancy, keep it simple and consistent), give you more sag in your ET and no significant change in roast finish times, then it's likely underpowered.
I'm not a fan of Turkish roasters, I got rid of mine after a few years of fiddling and never being satisfied with them. By and large, they're very spotty in terms of build quality. But I have no experience with this manufacturer, so for all I know, this one might be built better.
I tried 5 roasts last night using this advice. I did the cigarette lighter test for airflow. Set it and forgot it. 75oz charges at <400*F. I did nothing to try and mitigate the fluctuations for now.
Here are the roasts in order:
And my favorite:
I roasted these for retail bags and not bar brew, but I kept enough to be able to cup them this morning.
The Sumatra was surprisingly good. Less black pepper, no bitterness whatsoever, very sweet with a distinct honey dew finish. I never got that before in 3 years roasting this coffee. It's exciting to think where this coffee can go when I tame the "W" dip.
The Ethiopia is simply outstanding. Big blueberry bomb, no astringency, sweet and complex with more body than I am used to with this coffee. Just black, it sipped like a soft drink.
The Costa Rica was also very nice. Juicy, sweet and cocoa-y. Very balanced.
I have yet to cup the Brazil. I'm a bit caffeinated at the moment.
My takeaway is that, given the squirreliness of these roasts, I'm surprised how juicy all of them are. With my air roaster I fight dryness and astringency and struggle for sweetness. With this roaster both seem to come easily with more margin for error in the curves. The jury is still out, but it looks this drum roasting thing might be worth the PITA that it is. That's the only disappointment so far.