holdenm@thor.acc.stolaf.edu (Mark Holden) (04/11/89)
I've got a Sunn Beta-Lead guitar amplifier that I'd like to upgrade, hopefully to be quieter, and maybe better sounding. It's preamp scection is based around 8 1458/4558 op amps, which to my understanding are pretty generic, general purpose, and not terribly impressive in either quietness or response. Now, I believe that the TL082 (RS# 276-1715, $1.98) JFET op amp is a pin compatable replacement that's both quieter, and has better response. My questions are these: 1) Is this thing really compatable, or am I wrong? (the IC's in general are RC4558's and one 1458) 2) will this make a noticeable difference? 3) since the amplifier has a builtin overdrive in the fasion of gain/level per channel into master volume, will using FET op-amps change the overdriven sound much, I understand that FET stuff soft clips over a range, as opposed to others which hard-clip at a given point. From a guitarist's perspective this would be good (more of a tube sound) Any comments aybody? -- Mark Holden (holdenm@thor.acc.stolaf.edu) No user servicable parts. Refer servicing to qualified service personnel