Need circuit, 6,12,18,24db attenuator - Page 3 - diyAudio
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Old 22nd March 2013, 09:04 PM   #21
GoatGuy is offline GoatGuy  United States
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Location: SF Bay Area
Then there's another method... having a series of shunt resistors that each add 6 dB ... of attenuation. The only caveat is that they have to be turned ON in sequence "conceptually left to right"...

R0 (first series resistor) = 1000 ohms
R1 (first shunt resistor) = 1000 ohms
R2 (second shunt resis.) = 500 ohms
R3 (third shunt resistor) = 250 ohms
R4 (fourth shunt resist.) = 125 ohms

So, with no resistors shunted ... you get the 1K series resistor and the 10K load impedance resulting in an innocuous -0.8 dB drop... almost nothing. Then as each of the resistors is shunted in in turn, additional attenuation, in 6 dB steps.

Kind of what you're looking for?

GoatGuy
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Old 22nd March 2013, 09:40 PM   #22
GoatGuy is offline GoatGuy  United States
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Join Date: Dec 2012
Location: SF Bay Area
Default And now for a little circuit diagram...

is there a diagram? Hard to tell... let me see
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File Type: png resistor divider 6db 12db 18.png (7.4 KB, 33 views)
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