A siphon brewer uses heat and pressure changes to move water between two chambers. Coffee steeps in the upper chamber, and the brewed liquid returns through a filter as the lower chamber cools. The spectacle is part of its appeal, but a repeatable cup still depends on a measured dose, a suitable grind and correct assembly of the particular model.
Check the glass, seals and filter before starting, then follow the brewer's instructions for heating and joining the chambers. The source gives 35 grams of coffee with 560 grams of water, a 1:16 starting ratio. Treat that as one recipe to evaluate rather than a universal capacity rule. Record the time after the coffee is added, the stirring pattern and the drawdown behavior.
Remove the heat as instructed and allow the coffee to return before handling the upper chamber. Let the glass cool before cleaning or disassembly. If drawdown changes markedly between brews, inspect the filter and grind rather than simply increasing the heat. Burner choice and replacement filters are also ownership considerations: a brewer is easier to enjoy when its normal maintenance fits your routine.
The conversation
A good question can make a better brew.