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   sci.electronics.basics      Elementary questions about electronics      72,318 messages   

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   Message 72,060 of 72,318   
   Chris M. White to pcdhSpamMeSenseless@electrooptical.   
   Re: Audio Attenuator   
   09 Jun 21 16:24:04   
   
   From: cw9877@gsm.com   
      
   On Wed, 9 Jun 2021 04:06:44 -0400, Phil Hobbs   
    wrote:   
      
   >Chris M. White wrote:   
   >> Hi guys,   
   >>   
   >> I have an old vintage HP audio osciallator which I want to use for   
   >> some experimentation to get more practice in electronics. Its output   
   >> is continually variable between 4 and 20 volts. Problem is, for some   
   >> experiments I have in mind, I need it to output only between 1mV and   
   >> 10mV. The oscailator's output impedance is 600 ohms it states.   
   >> Can anyone suggest a simple passive attenuator I could build from   
   >> easily available components which would give me this much lower output   
   >> please?   
   >> thanks!   
   >>   
   >   
   >A bit more detail would be useful.   
      
   I'm happy to oblige. Anything specific?   
      
   >   
   >However, something like a resistive voltage divider will probably be a   
   >good place to start.   
   >   
   >   
   >	 10k   
   >GEN 0----RRRRR----*----0  OUT   
   >                   |   
   >                   R   
   >                   R 10 ohms   
   >                   R   
   >                   |   
   >                   |   
   >                  GND   
   >   
   >To get down to 1 mV, you can hang a pot on the output.  Figuring out   
   >just how to do that would be a step forward.   
      
   What's the problem in that? Seems simple enough to my simple mind!   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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