JRC4558 specs

From mamunds–(at)–tk.com Tue May 14 13:48:45 CDT 1996
Newsgroups: alt.guitar.amps,rec.music.makers.guitar,alt.guitar
Subject: Re: TS-10 Tube Screamer mod to TS-9 specs
From: mamunds–(at)–tk.com (Mark Amundson)
MIME-Version: 1.0
Date: 13 May 96 12:44:20 GMT
Xref: geraldo.cc.utexas.edu alt.guitar.amps:15058 rec.music.makers.guitar:93286 alt.guitar:94305

In article <3196E8DE.5F3--(at)--.washington.edu>, mielk–(at)–.washington.edu says…
>
>After a weekend of opening up every Japanese radio or tape deck I could
>get my hands on, I still can’t find a JRC4558 op amp. Can anyone
>simplify my search a little bit with information about more specific
>things to look for? What companies definitely used them? Are they
>mostly just in small, low-power devices, or are they in bigger things
>too? Any information is helpful, especially if I decide to go out and
>buy used things that aren’t completely broken yet, just for the part.
>
>Thanks
>
>Jeff

Lets see. I have my New Japan Radio Co., Ltd. data book open. On page 2-1
they list all their versions of the JRC4558:

General Purpose JRC4558
Low Power JRC022
Wide Band JRC4559
FET Input JRC072
Low Noise JRC5532
High Performance JRC4580
High Output Current JRC4556

This is only partially listed, I don’t have the time. The JRC4558 is still
available from the NJR Corporation, 340-B, East Middlefield Rd. Mountain
View, CA. 94043. Phone 415-961-3901 for distributers.

Basic JRC4558 Specs: (Now called the NJM4558)

Max Supply +/- 18V
Oper. Temp -20 to +75C
Input Res. 0.3Meg min. (5Meg typ.)
Large Sig. Voltage Gain 100dB typ.
Max. Output Voltage Swing–(at)–0kohms +/-14V typ.
Supply Voltage Rejection Ratio 90dB typ.
Supply Current 3.5 mA typ.
Slew Rate 1V/usec
Equiv. Input Noise Voltage RIAA
Rs=1k, LPF=30kHz 1.4uV typ.
Unity Gain Bandwidth 3 MHz

Description: Dual High Gain Internally Compensated OP-AMP with the
features of the NJM741 Single OP-AMP. Parameter matched for mandatory
gain and phase match applications.

Mark Amundson,