Looking for Motorolla HEPC6003 four pin Amplifier Chip

B

Beginner Student

Guest
Greetings,

Looking for 1-4 pcs. of Motorolla part number HEPC6003 four pin
amplifier IC in funky flat package. If anyone has any in their
junkbox, please email me. If anyone has the data sheet for this part
so I can figure out a sub for it then that would also be tip top!!!

Thank you! Thank you! Thank you!

transistorPLEASE@REMOVEkc.rrTHIS.com
 
Beginner Student (transistorPLEASE@REMOVEkc.rrTHIS.com) writes:
Greetings,

Looking for 1-4 pcs. of Motorolla part number HEPC6003 four pin
amplifier IC in funky flat package. If anyone has any in their
junkbox, please email me. If anyone has the data sheet for this part
so I can figure out a sub for it then that would also be tip top!!!

Thank you! Thank you! Thank you!

transistorPLEASE@REMOVEkc.rrTHIS.com



If this isn't to repair an existing piece of equipment, you really ought
Click to expand...
to find another circuit that does the same thing but using a more common part.

That's part of the HEP replacement line, and could be as old as thirty
years old. Indeed, without checking (but I can picture the package and
have an idea of the part under its normal Motorola number), the device
is thirty years old.

You're having problems finding it because it is an old device, wasn't all that
common, and you are looking for a replacement line device that hasn't been
around for twenty years or so.

It's not a common part, and even the Motorola part was hardly common.

Michael
 
"Beginner Student" <transistorPLEASE@REMOVEkc.rrTHIS.com> wrote in
message news:40f1b79f.985082@news-server.kc.rr.com...
Greetings,

Looking for 1-4 pcs. of Motorolla part number HEPC6003 four pin
amplifier IC in funky flat package. If anyone has any in their
junkbox, please email me. If anyone has the data sheet for this part
so I can figure out a sub for it then that would also be tip top!!!

Thank you! Thank you! Thank you!

transistorPLEASE@REMOVEkc.rrTHIS.com
Click to expand...
The HEP C6003 is a linear 1/4W audio amplifier, in case 206A. Case
206a is a four pin IC with staggered pins. Obviously the pins can only
be positive, negative or common, input, and output. The power supply is
12V, and typical voltage gain is 30dB. The Zin is 33k, and Zout is 16
ohms. Power dissipation is 250mW.

The HEP manual gives the dimensions of the case, but oddly, not the
pinout. But four pins is super simple. You should be able to trace
these out on your circuit.

You could use the LM386 for a 1/4W amp if you change the IC. That may
take some work, but it would be worth it, since the '386 is real common.
 
Thank you for the info. This is exactly what I am looking for. I can
figure out the four pins from the schematic. Input to this chip is
coming from a 2N2222 transistor that is the final transistor in a
three transistor preamp. The transistor is set up as a common emitter
amplifier. (I think). Output from the HEPC6003 is to an 8ohm speaker
so that is no problem.

How would I go about matching output impedance of the 2N2222
transistor to the input of the replacement LM386? I know it takes the
a resistor but how do you figure this value out? + I need the right
bias resistor to match the new LM386 amp right?! This = WAY over my
head. If someone can point me to the right formula or instructions, I
will try to find my way through it... Was thinking of just using a
decade resistor box and changing the value until I get best signal
transfer to the LM386?!? CHeaters way out? Thanks again for help!

transistorPLEASE@REMOVEkc.rrTHIS.com (Beginner Student)
I think I can figure everything else out as far as setting up the
LM386 to have the same gain or perhaps a little more wouldn't hurt.

This is a super sensitive amplifier circuit for listening to wildlife,
birdwatching, etc.




On Sun, 11 Jul 2004 20:30:14 -0700, "Watson A.Name - \"Watt Sun, the
Dark Remover\"" <NOSPAM@dslextreme.com> wrote:

"Beginner Student" <transistorPLEASE@REMOVEkc.rrTHIS.com> wrote in
message news:40f1b79f.985082@news-server.kc.rr.com...
Greetings,

Looking for 1-4 pcs. of Motorolla part number HEPC6003 four pin
amplifier IC in funky flat package. If anyone has any in their
junkbox, please email me. If anyone has the data sheet for this part
so I can figure out a sub for it then that would also be tip top!!!

Thank you! Thank you! Thank you!

transistorPLEASE@REMOVEkc.rrTHIS.com

The HEP C6003 is a linear 1/4W audio amplifier, in case 206A. Case
206a is a four pin IC with staggered pins. Obviously the pins can only
be positive, negative or common, input, and output. The power supply is
12V, and typical voltage gain is 30dB. The Zin is 33k, and Zout is 16
ohms. Power dissipation is 250mW.

The HEP manual gives the dimensions of the case, but oddly, not the
pinout. But four pins is super simple. You should be able to trace
these out on your circuit.

You could use the LM386 for a 1/4W amp if you change the IC. That may
take some work, but it would be worth it, since the '386 is real common.
Click to expand...
 
In article <10f414mj1su67f4@corp.supernews.com>,
Watson A.Name - \"Watt Sun, the Dark Remover\" <alondra101@hotmail.com> wrote:
"Beginner Student" <transistorPLEASE@REMOVEkc.rrTHIS.com> wrote in
message news:40f1b79f.985082@news-server.kc.rr.com...
Greetings,

Looking for 1-4 pcs. of Motorolla part number HEPC6003 four pin
amplifier IC in funky flat package. If anyone has any in their
junkbox, please email me. If anyone has the data sheet for this part
so I can figure out a sub for it then that would also be tip top!!!

Thank you! Thank you! Thank you!

transistorPLEASE@REMOVEkc.rrTHIS.com

The HEP C6003 is a linear 1/4W audio amplifier, in case 206A. Case
206a is a four pin IC with staggered pins. Obviously the pins can only
be positive, negative or common, input, and output. The power supply is
12V, and typical voltage gain is 30dB. The Zin is 33k, and Zout is 16
ohms. Power dissipation is 250mW.

The HEP manual gives the dimensions of the case, but oddly, not the
pinout. But four pins is super simple. You should be able to trace
these out on your circuit.
Click to expand...
A good bet it's the MFC4000B. Try the 1969 Moto databook.
(John, I seem to remember that you've got one of those).

Mark Zenier mzenier@eskimo.com Washington State resident
 
Beginner Student wrote:

Thank you for the info. This is exactly what I am looking for. I can
figure out the four pins from the schematic. Input to this chip is
coming from a 2N2222 transistor that is the final transistor in a
three transistor preamp. The transistor is set up as a common emitter
amplifier. (I think). Output from the HEPC6003 is to an 8ohm speaker
so that is no problem.

How would I go about matching output impedance of the 2N2222
transistor to the input of the replacement LM386? I know it takes the
a resistor but how do you figure this value out? + I need the right
bias resistor to match the new LM386 amp right?! This = WAY over my
head. If someone can point me to the right formula or instructions, I
will try to find my way through it... Was thinking of just using a
decade resistor box and changing the value until I get best signal
transfer to the LM386?!? CHeaters way out? Thanks again for help!
Click to expand...
You can go to this URL, http://www.national.com/pf/LM/LM386.html and
download and view the National datasheet, which has the schematics for
the simple amp, as Figure 1, "Amp with gain = 20". You can add the 10
uF cap between pins 1 and 8 for more gain.

You can see that essentially, it's the same setup, only four
connections. Pins 2 and 4 are grounded. Pin 6 is the power supply.
Pin 5 is the output, which goes to a capacitor and then to the speaker.
And the pin 3 is the input which goes to the wiper of a volume
control. If you don't have one of these, then you should add one.

You can get the LM386 for a dollar or two from your local Radio Snack.
You could super glue it upside down, on its back to the circuit board,
and run wires from each pin to the original holes in the circuit board.
Just make sure that the original has the 220 uF output capacitor
between it and the speaker.

transistorPLEASE@REMOVEkc.rrTHIS.com (Beginner Student)
I think I can figure everything else out as far as setting up the
LM386 to have the same gain or perhaps a little more wouldn't hurt.

This is a super sensitive amplifier circuit for listening to wildlife,
birdwatching, etc.

On Sun, 11 Jul 2004 20:30:14 -0700, "Watson A.Name - \"Watt Sun, the
Dark Remover\"" <NOSPAM@dslextreme.com> wrote:
Click to expand...

"Beginner Student" <transistorPLEASE@REMOVEkc.rrTHIS.com> wrote in
message news:40f1b79f.985082@news-server.kc.rr.com...

Greetings,

Looking for 1-4 pcs. of Motorolla part number HEPC6003 four pin
amplifier IC in funky flat package. If anyone has any in their
junkbox, please email me. If anyone has the data sheet for this part
so I can figure out a sub for it then that would also be tip top!!!

Thank you! Thank you! Thank you!

transistorPLEASE@REMOVEkc.rrTHIS.com

The HEP C6003 is a linear 1/4W audio amplifier, in case 206A. Case
206a is a four pin IC with staggered pins. Obviously the pins can only
be positive, negative or common, input, and output. The power supply is
12V, and typical voltage gain is 30dB. The Zin is 33k, and Zout is 16
ohms. Power dissipation is 250mW.

The HEP manual gives the dimensions of the case, but oddly, not the
pinout. But four pins is super simple. You should be able to trace
these out on your circuit.

You could use the LM386 for a 1/4W amp if you change the IC. That may
take some work, but it would be worth it, since the '386 is real common.
Click to expand...
 
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