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HEP 590 data?

P

PhattyMo

Jan 1, 1970
0
Hi All,

Does anyone have any data on the HEP 590 (and other HEP IC's?)
I found a few in my parts box,but have no data.

Thanks!
 
P

PhattyMo

Jan 1, 1970
0
PhattyMo said:
Hmm,That's not quite right.. the HEP590 I have here,has 10 leads. I
don't think it's a dual transistor either.IIRC it's something like an IF
amplifier,or something?..kinda fuzzy.

Ahh!
Here's some spec's that I found..

HEP590
Motorola, Inc. :: General Purpose RF-IF Amplifier
Specsheet / Datasheet
Power Gain Min. (dB)=25.0
Noise Figure Max. (dB)=5.0
f(test) (Hz) Test Frequency=60M
P(D) Max.(W) Power Dissipation=680m
Nom. Supp (V)=6.0
Status=Discontinued
Package=Can
Pins=10
Military=N
 
M

Michael Black

Jan 1, 1970
0
Hi All,

Does anyone have any data on the HEP 590 (and other HEP IC's?)
I found a few in my parts box,but have no data.
It's a Motorola MC1550, a differential amplifier good for IF and low
RF work, but with an internal biasing network.

It's similar to the RCA CA3028, but never quite the same because of
the internal biasing network.

The HEP line, at least the ICs, was mostly Motorola components renumbered.
The "HEP" was of coure "Hobby, Experimenter, Professional" so it wsa
about getting parts off a pegboard rather than a completely universal
replacement line. They wanted their parts available, so that was one
way of doing it. ECG/NTE came later, and they were a far better line of
replacement parts. I seem to have discared the first HEP replacement
guide I had, I think it fell apart, but the later one dating from
about 1975 is pretty sparse in the cross-reference, and I immedately
am reminded of how often there were mistakes in that cross-reference.

I know it's an MC1550 because it was something from Motorola's line, and
that number jumped out when I was thinking about it. I looked up the
schematic, and then an old magazine article that gave a partial internal
diagram of the HEP590, and they match; even more definite is the external
pinouts.

Michael
 
P

PhattyMo

Jan 1, 1970
0
Michael said:
It's a Motorola MC1550, a differential amplifier good for IF and low
RF work, but with an internal biasing network.

It's similar to the RCA CA3028, but never quite the same because of
the internal biasing network.

The HEP line, at least the ICs, was mostly Motorola components renumbered.
The "HEP" was of coure "Hobby, Experimenter, Professional" so it wsa
about getting parts off a pegboard rather than a completely universal
replacement line. They wanted their parts available, so that was one
way of doing it. ECG/NTE came later, and they were a far better line of
replacement parts. I seem to have discared the first HEP replacement
guide I had, I think it fell apart, but the later one dating from
about 1975 is pretty sparse in the cross-reference, and I immedately
am reminded of how often there were mistakes in that cross-reference.

I know it's an MC1550 because it was something from Motorola's line, and
that number jumped out when I was thinking about it. I looked up the
schematic, and then an old magazine article that gave a partial internal
diagram of the HEP590, and they match; even more definite is the external
pinouts.

Michael

Ah-Ha! Thanks Much Michael!
 
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