I have been batch sparging for awhile now with 1 burner, 1 keggle, 2 coolers and no electronics. I would like to step mash (only 2 steps) and fly sparge without getting any additional equipment.
I just read an article in BYO Jan-Feb 2013 by Walter Diaz about pumping hot water through a copper immersion chiller that is in the mash tun. I know this is backwards from a typical RIMS set-up but the author says it is a much gentler way to increase mash temps.
He is setting it up with a temperature controller but maybe it can be done manually and low-tech. The copper coil can be gently swirled in the mash while watching the temp to avoid over shooting. If the increase is 2 degrees per minute it should only take 8-9 minutes for each step.
Has anyone else tried this?