pas volume control pot values

67.239.202.10

Posted on August 26, 2009 at 05:11:06

I have bypassed balance and blend functions and am using only the 250 k volume control on my pas. I have left the resistors connected to the loudness tap for better linearity but am thinking of replacing the pot with a dual 1meg and deleting the loudness circuit. Any ideas on whether this is a good plan?
Gene

Not a good plan.

Bill Thomas

09:49:19 08/26/09

RE: Not a good plan.

05:10:20 08/31/09

RE: Not a good plan.

hvlee

06:01:14 09/05/09

Not a good plan., posted on August 26, 2009 at 09:49:19
Bill Thomas Industry Professional Posts: 1330 Location: Southern USA Joined: January 3, 2004	The way to go (if you are using the Phono Preamp section) is to make the "corrections" in the RIAA circuit (as suggested by Joe) and then replace the Volume Control with a dual 100K audio taper potentiometer. Joe has a "pre-qualified" 100 K control (it has been checked for proper "tracking" between sections) available for a reasonable cost. Hope this helps. Bill

RE: Not a good plan., posted on August 31, 2009 at 05:10:20
hartthethird	Dear Bill, Thanks for your help. I just sent a check to Joe for the 100k pot. My thinking on using a 1 meg. was that it would give a larker "span" without using the loudness taps. I'm not really an electronics guy, just a tinkerer. You probably already know this but mouser sells a dual 250k. pot with audio taper. Gene

RE: Not a good plan., posted on September 5, 2009 at 06:01:14
hvlee Audiophile Posts: 54 Location: East Tennessee Joined: February 12, 2007	In my limited (2 units) experience with the Mouser 250K pots, they were no improvement over the stock units I was replacing. They also lack the loudness tap. I don't use it, but I'm anal enough to not want a dead switch on the panel. Harry

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pas volume control pot values

67.239.202.10