IC in the SSL autofade circuit??

[quadwould]

So on the file: http://www.gyraf.dk/gy_pd/ssl/ssl_82e27.gif there seems to be an IC that is refered to as "351" but i have searched high and low, but have not found anything on it. i found a part that was cross referenced to an LM351, but that was all........ at least on the major distributors...

looking further i found that the LF351 is a 8pin DIP. but the IC on the Audfade circuit : http://www.nrgrecording.de/autofade.pdf is a 14pin dip.

so i first thought TL074.. but that is probably not what is needed.... but i then thought that maybe i should check into the quad vesion of the LF351/ LF356.... and founf the LF444ACN or LF444CN. seems to fit.. but my qustion leis here.

are there any others that i should be looking at?? better specs?

and anyone know which diodes this thing needs... does the schematic say "1544" on 5 of them ?? and the 10V ones.. well suppose i have to look into which would work..

 

[cuelist]

[quote author="quadwould"]so i first thought TL074.. but that is probably not what is needed.... but i then thought that maybe i should check into the quad vesion of the LF351/ LF356.... and founf the LF444ACN or LF444CN. seems to fit.. [/quote]

FYI - the quad version of LF353 is the LF347. The dual is called LF353.

 

[bcarso]

The footprint doesn't look like a standard quad op amp would work. It must be something very different.

 

[quadwould]

the footprint... do you mean the Physical size of the area it takes up, or the way a quad op-amp works.. sounds like the latter....

the LF444 from National Semi seems to have that exact foorprint

so i am just wondering if there is something better than an LF444A or does it not really matter....

 

[bcarso]

[quote author="quadwould"]the footprint... do you mean the Physical size of the area it takes up, or the way a quad op-amp works.. sounds like the latter....

the LF444 from National Semi seems to have that exact foorprint

so i am just wondering if there is something better than an LF444A or does it not really matter....[/quote]

I mean in terms of the pinout/functionality---it doesn't make sense. I doubt that the desired part is a quad op amp.

 

[quadwould]

and pinout.. ... that is for the LF444. same pinout as the PDF wants...

 

[moamps]

[quote author="quadwould"].... but the IC on the Audfade circuit : http://www.nrgrecording.de/autofade.pdf is a 14pin dip.[/quote]

It substitutes T4, T5 and T41 on the SSL schematic. LF347 is a good choice.
Footprint is OK.

... does the schematic say "1544" on 5 of them ??.. .

1S44, IMO (rectifier Si, 500V, 0.7A).

Regards,
Milan

 

[quadwould]

So you thing a TL074 (LF347) will do. Ok.
well therre is already one in the comp itself. simple enough... just purchase 2 then..

1s44?? will look into that

 

[bcarso]

On second glance, I hadn't read the pdf correctly and had thought I saw the supply pins going to outputs. But it looks o.k. now.

 

[moamps]

[quote author="quadwould"]..
1s44....[/quote]

Hi,

I checked the SSL service manual. It is 1S44.
Anyway, any DUS will do the job, IMO. (1N4148, for example)

Regards,
Milan