Value of R5 in H2

Hi All,

I have been reading through the article and there's one particular resistor value that I can't be sure that I understand. In page 6 of the article, Nelson mentioned that R5 is a 100 ohm resistor, which sets the output impedance of the circuit together with R3. However, on the schematic, R5 is marked as 33.2K. Is there an error in the schematic?

Best regards
Liu