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Old 1st May 2008, 05:05 PM   #1
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Default Stepped attenuator resistor calculation software

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/downloa...Install203.exe

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Old 11th October 2013, 08:51 PM   #2
vapkse is offline vapkse  Switzerland
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Thank you
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Old 11th October 2013, 09:03 PM   #3
kevinkr is offline kevinkr  United States
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25 position limit, and single dB attenuation per step across the range, a bit limiting.
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Old 13th October 2013, 11:14 AM   #4
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There are several of these on line as well.

Cheers

Ian
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Old 13th October 2013, 02:59 PM   #5
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Question 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.
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Old 13th October 2013, 03:27 PM   #6
DUG is offline DUG  Canada
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3dB is noticeable by the ear.

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

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