LM1458H metal can

[hamerfan]

I was offered some metal can LM1458H for 2 bucks a pop. Any advantages over the 80ct plain jane IC?

 

[anevilspar7an]

Probably vintage thus 'mojo'
All up to you if you want them.

 

[like Yeah!]

I was offered some metal can LM1458H for 2 bucks a pop. Any advantages over the 80ct plain jane IC?

nice.. i just found a nos ratshack 1458 ic in a bunch of junk.. it's not a can though it's just an ic.
now i'm trying to see what vintage pedal i could use it for..

 

[hamerfan]

Its a drop-in for all 4885 driven overdrives or distortions. I am gonna build a Silver Bee clone with it.

 

[Laundryroom David]

I was offered some metal can LM1458H for 2 bucks a pop. Any advantages over the 80ct plain jane IC?

I think the metal cans look cool

 

[jessenator]

Probably vintage thus 'mojo'

^^^ This

I think the metal cans look cool

^^^ Also this

But it all comes down to where you want to put your money and priorities, OP.

 

[spi]

They're the noisy version of the 4558, I think. But can==mojo.

 

[Laundryroom David]

The half watt carbon resistors of the opamp world if you will

 

[jessenator]

I've seen the 1458 commented as being dual "improved" µA741s, but I'm not a silicon whisperer enough to tell you what that means.

For example, I have read—with very few details in the write-up—that the OP07 started with relatively "get the job done" specs, and would typically perform okay. But in subsequent die revisions PMI would iterate on various aspects to improve SNR, among other things. I.e. the OP07 you get from TI, is going to be less noisy than an OG H can specimen. Where this crosses over into our small pool of electrical engineering, I can't say.

Also stands to reason that how this correlates to the revisions of the LM1458 I can't say definitively, but it stands to reason that depending on the date code there will be some incremental improvements to the fab process.

 

[hamerfan]

My simple electronic understanding just thought that a metal can could have a better shielding than a plastic casing.

 

[darwin999]

My simple electronic understanding just thought that a metal can could have a better shielding than a plastic casing.

True, but only at very high frequencies, e.g., well above audio frequencies, more like RF.
At audio frequencies, the electromagnetic penetration length is much longer than the thickness of a can.
For example, at 60Hz the electromagnetic penetration length for pure copper is roughly of order 1 cm - i.e., the waves decay exponentially with that length scale.

 

[Sturdag Lagernathy]

Metal can IC's handle heat dissipation much better, and can have higher wattage ratings than their plastic counterparts. A 2N2222 metal can is basically a 2N3904 with a somewhat higher wattage rating.

 

[like Yeah!]

so if you set your rig on fire... with actual fire... the metal ones are better?