ba301?

E

Earl

Guest
Hello everyone
Can someone help with the ba301 audio pre-amplifier, I need to
understand the connections. I have a sound meter diagram

http://www.gti.net/wallin/audio/rsmeter/33-2050/rs_spla.gif

I can guess some of the connections, e.g. power and gnd are
obviously 7 & 4, 2 seems to be the input and 6 the output,
but what are 1,3,4, &5. Is there a replacement chip for this
obsolete IC. What is the amplification of this IC, and can I
just use a simple op-amp instead ?
 
Earl wrote:
Hello everyone
Can someone help with the ba301 audio pre-amplifier, I need to
understand the connections. I have a sound meter diagram

http://www.gti.net/wallin/audio/rsmeter/33-2050/rs_spla.gif

I can guess some of the connections, e.g. power and gnd are
obviously 7 & 4, 2 seems to be the input and 6 the output,
but what are 1,3,4, &5. Is there a replacement chip for this
obsolete IC. What is the amplification of this IC, and can I
just use a simple op-amp instead ?
Click to expand...
http://www.google.com/search?hl=en&lr=&ie=ISO-8859-1&q=Ba301+ic&btnG=Google+Search
shows several places that list the BA301.


NTE 1135 is a replacement. You can get their datasheet at:
http://www.nteinc.com/

--
We now return you to our normally scheduled programming.

Take a look at this little cutie! ;-)
http://home.earthlink.net/~mike.terrell/photos.html

Michael A. Terrell
Central Florida
 
"Michael A. Terrell" <mike.terrell@earthlink.net> wrote in message news:<400AB810.22DBECBF@earthlink.net>...
Earl wrote:

Hello everyone
Can someone help with the ba301 audio pre-amplifier, I need to
understand the connections. I have a sound meter diagram

http://www.gti.net/wallin/audio/rsmeter/33-2050/rs_spla.gif

I can guess some of the connections, e.g. power and gnd are
obviously 7 & 4, 2 seems to be the input and 6 the output,
but what are 1,3,4, &5. Is there a replacement chip for this
obsolete IC. What is the amplification of this IC, and can I
just use a simple op-amp instead ?

http://www.google.com/search?hl=en&lr=&ie=ISO-8859-1&q=Ba301+ic&btnG=Google+Search
shows several places that list the BA301.


NTE 1135 is a replacement. You can get their datasheet at:
http://www.nteinc.com/
Click to expand...
The ba301 is indeed listed, but there is no datasheet to be found.
Do you know if the NTE 1135 can be used as a replacement in an
existing design, i.e. is it compatible also in functionality, also
in pins, and also in voltage levels etc.
 
Beale wrote:
"Michael A. Terrell" <mike.terrell@earthlink.net> wrote in message news:<400AB810.22DBECBF@earthlink.net>...

http://www.google.com/search?hl=en&lr=&ie=ISO-8859-1&q=Ba301+ic&btnG=Google+Search
shows several places that list the BA301.


NTE 1135 is a replacement. You can get their datasheet at:
http://www.nteinc.com/

The ba301 is indeed listed, but there is no datasheet to be found.
Do you know if the NTE 1135 can be used as a replacement in an
existing design, i.e. is it compatible also in functionality, also
in pins, and also in voltage levels etc.
Click to expand...
More than likely the NTE is a re-labeled BA301. NTE simply buys a
quantity of a comon part and has their part number put on it for repair
use. Their data is the same as the vendor they bought the part from.


--
We now return you to our normally scheduled programming.

Michael A. Terrell
Central Florida
 
Beale wrote:
"Michael A. Terrell" <mike.terrell@earthlink.net> wrote in message news:<400AB810.22DBECBF@earthlink.net>...
Earl wrote:

Hello everyone
Can someone help with the ba301 audio pre-amplifier, I need to
understand the connections. I have a sound meter diagram

http://www.gti.net/wallin/audio/rsmeter/33-2050/rs_spla.gif

I can guess some of the connections, e.g. power and gnd are
obviously 7 & 4, 2 seems to be the input and 6 the output,
but what are 1,3,4, &5. Is there a replacement chip for this
obsolete IC. What is the amplification of this IC, and can I
just use a simple op-amp instead ?

http://www.google.com/search?hl=en&lr=&ie=ISO-8859-1&q=Ba301+ic&btnG=Google+Search
shows several places that list the BA301.


NTE 1135 is a replacement. You can get their datasheet at:
http://www.nteinc.com/

The ba301 is indeed listed, but there is no datasheet to be found.
Do you know if the NTE 1135 can be used as a replacement in an
existing design, i.e. is it compatible also in functionality, also
in pins, and also in voltage levels etc.
Click to expand...

--
We now return you to our normally scheduled programming.

Michael A. Terrell
Central Florida
 
"Michael A. Terrell" <mike.terrell@earthlink.net> wrote in message news:<401686C5.5B0B65D7@earthlink.net>...
Beale wrote:

"Michael A. Terrell" <mike.terrell@earthlink.net> wrote in message news:<400AB810.22DBECBF@earthlink.net>...

http://www.google.com/search?hl=en&lr=&ie=ISO-8859-1&q=Ba301+ic&btnG=Google+Search
shows several places that list the BA301.


NTE 1135 is a replacement. You can get their datasheet at:
http://www.nteinc.com/

The ba301 is indeed listed, but there is no datasheet to be found.
Do you know if the NTE 1135 can be used as a replacement in an
existing design, i.e. is it compatible also in functionality, also
in pins, and also in voltage levels etc.

More than likely the NTE is a re-labeled BA301. NTE simply buys a
quantity of a comon part and has their part number put on it for repair
use. Their data is the same as the vendor they bought the part from.
Click to expand...

Any ideas why we have a 120k resistor between pins 2 & 5
in the sound meter ? I understand that pin 5 is "bypass"
but what exactly does it mean, there are no examples how
to use it?
 
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