Posts

About Roast Colour - Agtron scale on Tonino

Afbeelding
Marko Luther wrote this very detailed article about Understanding Roast Colour: https://artisan-roasterscope.blogspot.com/2023/03/understanding-roast-color.html He also announced a new version of the Tonino app and the Tonino firmware which enables the option to measure roast colour in the "Agtron" scale:

LONDINIUM group water flow

Afbeelding
 some pictures and video of the group sleeve holes, the inlet hole and the water flow    

VECTIS unboxing (ZOOM video edited)

Afbeelding
 

DECCA K.W. E-ZEE Match antenna tuner [RADIO]

Afbeelding
  See also: https://vk6ysf.com/kw_ezee_match.htm   https://swling.com/blog/2023/02/frans-add-a-decca-manual-antenna-tuner-to-his-urban-listening-post/

LONDINIUM pressure gauge service

Afbeelding
 

Rate of Rise after Dry End

Afbeelding
A friend asked what range of RoR I get after the first "Drying" phase of the roast. It's mostly between 10ºC/min and 4ºC/min, with a slight 'bulge' when the beans start to crack and heat escapes from the 'pressure cooker' hot cells that burst open.  When that bulge happens (around 10mins here) the probe gets hotter but the expanding and bursting bean cells themselves do not get so much hotter. It's like lifting the spout off a hot kettle. You suddenly feel extra heat on your finger tips but that does not mean the kettle just suddenly got hotter.