[R-390] LINE /AUDIO POTS

[Steve Toth]

You got it - the resistor should be 20% of the pot value - 500 ohm.  Try a 470 or a 620, maybe even a 1k.  From what I understand the effect of a higher proportional value is a flattening of the log curve.  
- Steve  K7PZN"Always look for a positive solution then Improvise, Adapt, and Overcome"
"Sometimes it is the people who no one imagines doing anything, who do the things that no one can imagine".....
 

      From: Norman Ryan <nnryann at yahoo.com>
 To: Steve Toth <stoth47 at yahoo.com>; "jupete at internode.on.net" <jupete at internode.on.net>; "r-390 at mailman.qth.net" <r-390 at mailman.qth.net> 
 Sent: Thursday, March 17, 2016 12:44 AM
 Subject: Re: [R-390] LINE /AUDIO POTS
   
Great suggestion, Steve. So, with a 2.5k linear pot I just connect a 500 ohm (20% of 2.5k) resistor as you describe -- or should the resistances of pot and resistor be proportionally higher so they add up to 2.5k?
73Norman

      From: Steve Toth via R-390 <r-390 at mailman.qth.net>
 To: "jupete at internode.on.net" <jupete at internode.on.net>; "r-390 at mailman.qth.net" <r-390 at mailman.qth.net> 
 Sent: Thursday, March 17, 2016 1:29 AM
 Subject: Re: [R-390] LINE /AUDIO POTS
  
If you need  log pot response from a linear pot one method that works is connecting a resistor that's 20% of the value of the linear pot between the ground end solder lug  and the center variable contact solder lug.  
- Steve  K7PZN"Always look for a positive solution then Improvise, Adapt, and Overcome"
"Sometimes it is the people who no one imagines doing anything, who do the things that no one can imagine".....
 

      From: Pete Williams <jupete at internode.on.net>
 To: r-390 at mailman.qth.net 
 Sent: Wednesday, March 16, 2016 8:53 PM
 Subject: [R-390] LINE /AUDIO POTS
  
​    G'day  All.....
  Gary Schneider  from  'Playthings Of the  Past... have just  told me
that 2.5k pots  only  available in  linear taper.
Cheers
Pete
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