Tweakers' Asylum

RE:I have Luxman tuners that use them to drive signal strength LEDs.

74.226.222.143

1973shovel

In Reply to: RE: get rid of that 4558 as fast as you can posted by nightdoggy on July 03, 2007 at 02:29:03

And you lef them in?!! Oh my gash! LOL!

Below is a section from my original post on the function of the 4558 in my subwoofer amp. Looks (and sounds!) to me as if it's in the signal path.

When Stereophile reviewed this amp in 1994, during the bench-testing phase they reported "amplifier's low-pass crossover functions, implemented using 4558 dual op-amp chips..",

To tell you the truth, it's the other chip (the TL072) which I'd like to know the function of, now that I've played with it.

Doggy, thanks for all your input!

Follow Ups:

Actually I ripped it out of both tuners! - nightdoggy 16:12:23 07/03/07 (2)
And stomped up and down on them and then dropped the remnants down into the sewer in front of my house!
Actually I stole a bunch of OP270EZ (ceramic dips-nice!) op amps from work and used those.
The OP270 is a great op amp for dc applications like that and less than ideal for ac applications.
It is a hundred times better than the RC4558.
Yes, a hundred times exactly!
Gotta go, my cat just ran by me with another mouse in her chops.
doggy
- RE: my cat just ran by me with another mouse in her chops - 1973shovel 04:38:03 07/04/07 (1)
  Did the mouse have a 4558 in his chops? That's some well trained cat you have there doggy!
  - She left the last corpse on my bed! - nightdoggy 09:28:39 07/04/07 (0)
    Kinda gross but I guess she loves me!

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