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Roast 41 – Colombia Swiss Water Process Decaf
First Decaf Roast on the Gene Café CBR-301 After more than forty roasts on the Gene Café CBR-301, Roast 41 marks the first time decaffeinated coffee…
Roast 39 & Roast 40 – Brazil Santos (Cold vs Warm Start Comparison)
Key Metrics Summary MetricRoast 39Roast 40CoffeeBrazil Santos (Wanted)Brazil Santos (Wanted)Batch size250 g250 gVentilationOven hood extractionOven hood extractionStart conditionCold startWarm startStarting temp / ambient20°C75°CTime to 200°C04:2803:13Time to…
Roast 38 – Colombia Regional Jess (Huila, Washed Blend)
Gene Café CBR-301 | First Full Batch Roast After receiving the Regional Jess (Huila, washed blend), the goal of this roast was simple: Produce a clean,…
Gene Café CBR-301 Ventilation & Smoke – What Roasting Looks Like in a Real Kitchen
Key Observations Roaster: Gene Café CBR-301Environment: Indoor roasting (office) under standard kitchen extractor hoodVentilation: Passive hood extraction with aluminium duct directing exhaust airflow Smoke behaviour Little…
Sample Roast 3 – Regional Jess (Huila, Washed Blend)
Sample Roast 3 was a 56 g washed Colombia micro-batch that landed at 14.6% weight loss with 1:22 development after the first-crack button press. A temporary…
Roast 23 – Wanted Santos Arabica (Natural) | Espresso Baseline 1
17 Feb 2026Brazil Santos Natural – WantedIn: 250g → Out: 212.5g (15.0% WL)Intent: Santos espresso baseline Measured Data Batch size: 250g Target temperature: 250°C Weight loss:…
Gene Café CBR-301 – Observations After 20 Roasts
This page documents real, accumulated experience using the Gene Café CBR-301 as a home roaster. It is not a review.It is not a buying guide.It is…
Roast 22 – Guatemala Acatenango, Caturra (Washed) | Lower Structural Target | 15.5% WL
Date: 15 February 2026Machine: Gene Café CBR-301Batch: 250gSet Temperature: 250°CPreheat: NoCooling Initiated: 12:25 (745 seconds)First Crack (logged): 11:20 (680 seconds)Development Time: 65 seconds (crack to cool)Weight…
Roast 21 – Guatemala Caturra (Washed) | Alignment Attempt
Roaster: Gene Café CBR-301Batch: 250 gSet Temp: 250°CPreheat: NoneFan: 2 → 3 at 4:27Cooling initiated: 12:51 (771 s)Output: 210.1 gWeight Loss: 16.0%Development (from crack flag): 83…
Roast Notes – After 22 Roasts on the Gene Café CBR-301
Last Updated: February 2026Roasts Included: 22 total (20 standard + 2 sample roasts)Roaster: Gene Café CBR-301Baseline: 250 g | 250 °C | Fan 2 → 3…
Roast 20 – Guatemala Caturra (Washed) | Washed Central America Contrast
Roaster: Gene Café CBR-301Batch Size: 250 gSet Temperature: 250°CPreheat: NoneAirflow: Fan 2 → 3 at ~4:00Cooling initiated at: ~13:10 (approx.)Output Weight: 209.7 gWeight Loss: 16.1% Role…
Roast 19 – Honduras Catuai (Washed) | Reset Palate / Washed Baseline
Gene Café CBR-301 | Active Exhaust Baseline In / Out: 250 g → 214.3 gWeight Loss: 14.3%Set Temp: 250 °CEnd Decision: First crack + 80 secondsCooling:…
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