Input buffer on Tube Screamer

[lordoftears]

Hi,
I read that C1 capacitor (27nF) and R2 resistor (1kOhm) in the Tube Screamer input buffer work to attenuate frequences under 588Hz.
But doing the calculation using the formula f=1/(2PI*R*C) it seems to be 5897.6Hz!

Am I wrong with calculation or there's something odd in this strange world?

Schematic: http://diy.musikding.de/images/stories/screamer/screamerschalt.pdf

[merlinb]

Current in the capacitor has to flow in R2 and R3, and into the base of the transistor. The input resistance of the transistor is about R4*hfe, which is perhaps 1Meg. In parallel with R3 that makes 337k. Finally adding the 1k resistor we get 338k. Now doing the frequency calculation I get 17Hz. Sounds like you've been reading the wrong stuff!

[rockhorst]

If you want to adjust the frequency response of a TS circuit, you need to look at the clipping stage. AMZ Fat Mod

[lordoftears]

Thank you guys, I'll give a better look