Stepped attenuator resistor calculation software

[pmillett]

Jim Tonne, who writes some interesting software for ham radio and EE use (http://tonnesoftware.com/) has come up with a program to calculate resistor values for DIY stepped attenuators.

You specify number of switch positions, end-to-end resistance, and dB/step. It tells you what resistors to use.

I don't think the program is linked from his home page, but you can download it here:

http://www.tonnesoftware.com/downloads/VolumeControlInstall203.exe

Pete

 

[vapkse]

Thank you

 

[kevinkr]

25 position limit, and single dB attenuation per step across the range, a bit limiting.

 

[ruffrecords]

There are several of these on line as well.

Cheers

Ian

 

[Nikolas Ojala]

3 dB steps

Who else thinks that 3 dB steps are quite ok?

I noticed this when I used a remote controller to adjust volume. Usually I noticed that when I did, I had to do more than 10 dB adjustments and 3 dB would be a fine adjustment.

I know that 3 dB step in signal level means double or half power, but still, this is what I noticed.

 

[DUG]

3dB is noticeable by the ear.

I'm designing with 2dB steps to make it seem like "fine control".

🙂