OT: Regulator choice for power supply

[Dave Mueller-3]

Hi,

I'm going to be building a power supply for a K2.  I have two choices for regulators from the junk
box:  an LM338, T03 5A adjustable regulator, and a complete PCB based on the LM723 with external
pass transistors.  I have a torodial transormer that can supply 3A continous.

I'd like to use the LM723 board, but I'd also like to save it for a more complicated supply (like
for the KPA-100).  For some reason, I don't want to trust the LM338, its just too simple...
Performance? Reliability?  I can't quite grasp the possiblity that I can get a decent supply with
less than 10 parts!

Thanks & 73,
Dave AA3EE
no s/n yet!
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[Jack Brindle]

The LM338 works quite well. Simpler means fewer parts to fail making  
higher reliability.

Given the choice, I went with the LM338. Several times...

Build the power supply, then you should acquire a S/N!
;-) :-) :-)

On Mar 2, 2006, at 5:46 PM, Dave Mueller wrote:

> Hi,
>
> I'm going to be building a power supply for a K2.  I have two  
> choices for regulators from the junk box:  an LM338, T03 5A  
> adjustable regulator, and a complete PCB based on the LM723 with  
> external pass transistors.  I have a torodial transormer that can  
> supply 3A continous.
>
> I'd like to use the LM723 board, but I'd also like to save it for a  
> more complicated supply (like for the KPA-100).  For some reason, I  
> don't want to trust the LM338, its just too simple... Performance?  
> Reliability?  I can't quite grasp the possiblity that I can get a  
> decent supply with less than 10 parts!
>
> Thanks & 73,
> Dave AA3EE
> no s/n yet!

- Jack Brindle, W6FB
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