In article , Arny
Krueger
wrote:
"Jim Lesurf" wrote in message

In article , Dave Plowman (News)
wrote:
I need to knock up some stereo (domestic) line level amps with a gain
of 0-10dB. Using a +/-15 volt supply. Anything better than the ol' NE
5543 for this these days?

FWIW I always preferred the Hitachi 12017. But I realise that this is
a somewhat unusual choice. :-)

Looks like it is purpose developed for RIAA preamps.

Yes. That was the intent of Hitachi. :-)

However experiment showed that with suitable tweaking of the stabilisation
network it works nicely as a buffer of voltage gain stage.

It seems to be happy with somewhat higher VCC.

Yes. IIRC I used to use it with +/-20V lines.

Reading the data sheet, I see no info about one of the NE5532/NE5534's
long suits, which is low distortion into low impedance loads.

Afraid I can't recall all the measurements I made. But the specs for the
Armstrong 732 showed I got less than 0.005% 20Hz-20kHz into the 10k IHFA
load. For up to over 10Vrms IIRC.

That was of course going though more than one 12017. I think it also worked
fine into much lower loads than 10k provided you didn't ask for +/-20V. And
I think it was OK down to about 1k load provided you only wanted a volt or
two. But I can't now recall details. Certainly at the time I preferred it
to the competing op amps.

I guess most people never considered trying it as a general amp due to the
presentation being for RIAA. But I noticed the high rail, low noise, etc,
and found it responded well to being experimented with. Hence came to
prefer it.

Slainte,

Jim

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