by DeathRex » Fri Feb 22, 2013 6:32 pm
This would be my best guess:
1/2πFC
2 X 3.14 X 100Hz X 0.00000001 (10nf) = 159kohms.
2 X 3.14 X 250Hz X 0.00000001 = 63.7Kohms.
2 X 3.14 X 250Hz X 0.0000000001 (100pf) = 6.37Mohms.
Alot of my German radios have a BASS switch, that bypasses a 200 to 500pf cap. The resistor after the cap is usually the volume pot of about 1.3Mohm. So you're basically making a resistor divider with the resistance through the cap increasing with lower frequencies.
At first I wanted to be a ET. Now I are one.