Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site mtxinu.UUCP Path: utzoo!watmath!clyde!burl!ulysses!allegra!bellcore!decvax!genrad!panda!talcott!harvard!seismo!rochester!rocksvax!parcvax!hplabs!intelca!qantel!dual!unisoft!mtxinu!ed From: ed@mtxinu.UUCP (Ed Gould) Newsgroups: net.audio Subject: Re: speaker mod results Message-ID: <289@mtxinu.UUCP> Date: Mon, 25-Feb-85 16:31:27 EST Article-I.D.: mtxinu.289 Posted: Mon Feb 25 16:31:27 1985 Date-Received: Mon, 4-Mar-85 06:00:54 EST References: <2110@ncrcae.UUCP> Organization: mt Xinu, Berkeley, CA Lines: 22 > Last week, I removed the potentiometers and replaced them with > discrete resistors. The upgrade was *considerable*. Those pots were > FULL of 'grungeballs' :). ... > ... Hmmmm, I wonder about the pots on my preamp...? It's easy to replace pots with "stepped" controls - just use a rotary multi-throw switch and a batch of resistors. You can replace the volume and balance controls with two stepped volume controls - if you want good matching between the channels, use precision resistors (use carbon resistors, not wire-wounds, as the extra inductance of the wire-wounds may not be good). I can dig out the values I've seen used for the resistors if anyone cares. (You nay also need an additional resistor on one channel for balance zeroing.) It's probably worth getting good quality switches (gold contacts, or some such) and make-before-break switches are safer and gentler to the ears (depending on the circuitry, they may be required). -- Ed Gould mt Xinu, 739 Allston Way, Berkeley, CA 94710 USA {ucbvax,decvax}!mtxinu!ed +1 415 644 0146