Oooo, careful, first crack is roughly 200C and with a little development temp, your roast will get to 210-215 before dump

Where you at? I can help you out

At the current moment, what I can offer is just the following
Colombia Tolima Bambucho Washed - RM50/kg
Costa Rica Tarazzu Jaguar Honey - RM60/kg

February I will have
Brazil - RM60/kg
Ethiopian Yirgacheffe Red Cherry Natural - RM75/kg

Aiks, I'm in Penang. Running a roastery there
In this case will need to be using delivery

I know it will be roughly RM70 for 10kg poslaju

Would help if you are good with electricals
If possible, split out the power source going to the fan and heater then route the line to heat through a dimmer so you can control the heat

The fan is usually running on DC and actually goes through an additional AC->DC converter inside. So it's possible to power the fan with a separate source

What I find in default popcorn roasters is the heat is way too high so you can't roast more than 60g of coffee at a time. The lack of agitation will burn the bottom before anything else happens

Tip:
You won't be able to do a good light roast on it without mods so don't even bother. Can try for academic purposes though
So roast to at least end of 1C + 30sec

This post has been edited by ymeng85: Jan 10 2018, 10:16 AM

15C is interesting
My light roasts are around 5-6C above 1C

Can't remember off my head but in 1C it's like 2-3/min
% development for light roast filter is 11-15%, espresso about 18-20%
1C is usually around 1min to 1min30s

Just did the natural.
It's good