Re: Early solid state power amps

On 1/31/06 7:22 AM, in article 43df6086$1_3@xxxxxxxxxxxxxxxxx, "Walt"
<walt_askier@xxxxxxxxxxxxxx> wrote:

> John Stone wrote:
>
>> The IC 150 used (I believe) an LM301 in the high level portion and a
>> discrete circuit for the phono stage.
>
> (Walt gets out his IC 150 service manual)
>
> The ICs are:
>
> LF356H FET Op amp - master gain stage
> LM301AN Op amp - gain stage for the phono preamp
> MC78L18ACP - Voltage regulators
>
> So, partial credit. (c:
>
> The great thing about the IC 150 is that it was basically just a
> switchbox with one gain stage. Minimal.

This sounds like a different preamp and one that is much later-perhaps an
IC150A?. I am certain that the original IC150 did not have this chip
complement, and that the only IC used was in the high level stage. The rest
was discrete.

.

Relevant Pages

  • Re: Early solid state power amps
    ... discrete circuit for the phono stage. ... LM301AN Op amp - gain stage for the phono preamp ... The great thing about the IC 150 is that it was basically just a switchbox with one gain stage. ...
    (rec.audio.tech)
  • Re: Early solid state power amps
    ... discrete circuit for the phono stage. ... LM301AN Op amp - gain stage for the phono preamp ... The great thing about the IC 150 is that it was basically just a switchbox with one gain stage. ...
    (rec.audio.tech)