Info required on obsolete RS part... 
Author Message
 Info required on obsolete RS part...

Hi,

I'm looking for some data on an obsolete RS ("Radiospares") part:

  RS Stock number: 306-291
  Description: Integrated circuit operational amplifier current booster

This is a 9-pin TO66(?) part. Unfortunately I cleared out all my old
RS catalogs a while back, and the RS website and Google haven't been
able to help. There is no other part number or manufacturer ID visible.

If anyone could give me a standard part number equivalent, or provide
a scan of the RS catalog entry or even data sheet it would be a great
help.

Thanks,
Ian.



Fri, 03 Dec 2004 19:53:55 GMT
 Info required on obsolete RS part...

Quote:

> Hi,

> I'm looking for some data on an obsolete RS ("Radiospares") part:

>   RS Stock number: 306-291
>   Description: Integrated circuit operational amplifier current booster

> This is a 9-pin TO66(?) part. Unfortunately I cleared out all my old
> RS catalogs a while back, and the RS website and Google haven't been
> able to help. There is no other part number or manufacturer ID visible.

> If anyone could give me a standard part number equivalent, or provide
> a scan of the RS catalog entry or even data sheet it would be a great
> help.

Around what date?
--

---------------------------+-------------------------+--------------------------
 <Squawk> Pieces of eight!
 <Squawk> Pieces of eight!
 <Squawk> Pieces of eight!
 <Squawk> Pieces of eight!
 <Squawk> Pieces of eight!
 <Squawk> Pieces of nine!
 <SYSTEM HALTED: parroty error!>


Fri, 03 Dec 2004 21:52:02 GMT
 Info required on obsolete RS part...


on obsolete RS part...', on Mon, 17 Jun 2002:

Quote:
> RS Stock number: 306-291
>  Description: Integrated circuit operational amplifier current booster

It's a great pity that RS Components has not archived its old stock
numbers. The same applies to other distributors.
--
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
Interested in professional sound reinforcement and distribution? Then go to
http://www.isce.org.uk
PLEASE do NOT copy news posts to me by E-MAIL!


Fri, 03 Dec 2004 21:09:51 GMT
 Info required on obsolete RS part...

Quote:

> I'm looking for some data on an obsolete RS ("Radiospares") part:

>  RS Stock number: 306-291
>  Description: Integrated circuit operational amplifier current booster

> This is a 9-pin TO66(?) part. Unfortunately I cleared out all my old
> RS catalogs a while back, and the RS website and Google haven't been
> able to help. There is no other part number or manufacturer ID visible.

 Ian, that sounds like a Motorola MC1438R, a 300mA follower with
 a gain of 0.95, an 8MHz bandwidth, 95V/us slew rate, 10-ohm Zout,
 and a settable current-limit.  I can email a .pdf file if you like.
 These days one would use a TI / Burr-Brown BUF634 or similar part.

 Thanks,
       - Win



Sat, 04 Dec 2004 00:12:37 GMT
 Info required on obsolete RS part...

Quote:
>Around what date?

Unfortunately I have no idea, the parts have no date code - just the RS
logo and stock number.


Sat, 04 Dec 2004 01:18:36 GMT
 Info required on obsolete RS part...

Quote:

> Ian, that sounds like a Motorola MC1438R, a 300mA follower with
> a gain of 0.95, an 8MHz bandwidth, 95V/us slew rate, 10-ohm Zout,
> and a settable current-limit.  I can email a .pdf file if you like.
> These days one would use a TI / Burr-Brown BUF634 or similar part.

Thanks for that info - I would appreciate a copy of the pdf if you
don't mind (The email address in the header is valid). I've acquired
a number of these parts unused and am interested to know if they can
be used for anything hobby-wise...

Ian.



Sat, 04 Dec 2004 01:26:21 GMT
 Info required on obsolete RS part...

Quote:


>> Ian, that sounds like a Motorola MC1438R, a 300mA follower with
>> a gain of 0.95, an 8MHz bandwidth, 95V/us slew rate, 10-ohm Zout,
>> and a settable current-limit.  I can email a .pdf file if you like.
>> These days one would use a TI / Burr-Brown BUF634 or similar part.

> Thanks for that info - I would appreciate a copy of the pdf if you
> don't mind (The email address in the header is valid). I've acquired
> a number of these parts unused and am interested to know if they can
> be used for anything hobby-wise...


 Thanks,
       Win



Sat, 04 Dec 2004 02:11:28 GMT
 Info required on obsolete RS part...

Quote:

> Hi,

> I'm looking for some data on an obsolete RS ("Radiospares") part:

>   RS Stock number: 306-291
>   Description: Integrated circuit operational amplifier current booster

> This is a 9-pin TO66(?) part. Unfortunately I cleared out all my old
> RS catalogs a while back, and the RS website and Google haven't been
> able to help. There is no other part number or manufacturer ID visible.

> If anyone could give me a standard part number equivalent, or provide
> a scan of the RS catalog entry or even data sheet it would be a great
> help.

> Thanks,
> Ian.

In October 1985 cat'(page 291). Is actually  a "MC1438R" i.c.
(8.30!)
It's a  +/- 300ma, unity gain, op-amp current booster. Supply +/-5V to
+/-18V. Power BW 1.5MHz. output swing (at +/-15V supplies) +/-12V.
Dissipation 3W in air 11W on heatsink. Short circuit protected.
pin1=compensation, (1k and 470p in series to deck)
pin2=-ve I limit
pin3,4,5,6 outputs, link together.
pin7=+ I limit
Pin8= +V
pin9=i/p
Case=-V

Connect pin2 and pin7 via 3.3R resistors to output pins, to give a max
300ma current limit. 8.2R=200ma max, open cicuit=100ma max.

Pins to front, gap to left, pin #1 is at the 10'o'clock position.

Bit of a naff spec' (nowadays!).



Sat, 04 Dec 2004 04:05:17 GMT
 Info required on obsolete RS part...

Quote:


>> Hi,

>> I'm looking for some data on an obsolete RS ("Radiospares") part:

>>   RS Stock number: 306-291
>>   Description: Integrated circuit operational amplifier current booster

>> This is a 9-pin TO66(?) part. Unfortunately I cleared out all my old
>> RS catalogs a while back, and the RS website and Google haven't been
>> able to help. There is no other part number or manufacturer ID visible.

>> If anyone could give me a standard part number equivalent, or provide
>> a scan of the RS catalog entry or even data sheet it would be a great
>> help.

>> Thanks,
>> Ian.

>In October 1985 cat'(page 291). Is actually  a "MC1438R" i.c.
>(8.30!)
>It's a  +/- 300ma, unity gain, op-amp current booster. Supply +/-5V to
>+/-18V. Power BW 1.5MHz. output swing (at +/-15V supplies) +/-12V.
>Dissipation 3W in air 11W on heatsink. Short circuit protected.
>pin1=compensation, (1k and 470p in series to deck)
>pin2=-ve I limit
>pin3,4,5,6 outputs, link together.
>pin7=+ I limit
>Pin8= +V
>pin9=i/p
>Case=-V

>Connect pin2 and pin7 via 3.3R resistors to output pins, to give a max
>300ma current limit. 8.2R=200ma max, open cicuit=100ma max.

>Pins to front, gap to left, pin #1 is at the 10'o'clock position.

>Bit of a naff spec' (nowadays!).

They are even available!  See:

http://www.usbid.com/search/AddPartNoLogin_action.cfm?GOOGLEHotParts=...

d

_____________________________
Telecommunications consultant
http://www.pearce.uk.com



Sat, 04 Dec 2004 04:09:08 GMT
 Info required on obsolete RS part...

Quote:
>In October 1985 cat'(page 291). Is actually  a "MC1438R" i.c.

[snip summary details]

Thanks, that completes the picture as Win Hill has already kindly provided the
datasheet for the MC1438R.

Ian.



Sat, 04 Dec 2004 04:47:28 GMT
 Info required on obsolete RS part...

Quote:

> Hi,

> I'm looking for some data on an obsolete RS ("Radiospares") part:

>   RS Stock number: 306-291
>   Description: Integrated circuit operational amplifier current booster

> This is a 9-pin TO66(?) part. Unfortunately I cleared out all my old
> RS catalogs a while back, and the RS website and Google haven't been
> able to help. There is no other part number or manufacturer ID visible.

> If anyone could give me a standard part number equivalent, or provide
> a scan of the RS catalog entry or even data sheet it would be a great
> help.

> Thanks,
> Ian.

  If you need a similar device, used inside the feedback loop, check out
the Jameco 23051, the LH0002CN (10 pin DIP).


Sun, 05 Dec 2004 03:52:43 GMT
 
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