linear regulator question

[rtate]

The regulators in my dvd 2900 are of the "NJM78 and NJM79"
family.
I have been considering upgrading these with some sort of drop in super regulators, however with 9 regs in the front left and right alone it could get very $$$.

So my question is, are the regulators in question better than average?

I read some where that they are better than the standard regs

 

[peranders]

The regulators are probably very regular a 78xx and 79xx but when I read the datasheet they may be a bit better than average.

 

[rtate]

It seems that the current rating is my biggest issue.
The stock regulators are rated at 1.5 amp and most super regulators are rated around 300-600 Ma...

 

[AndrewT]

I will guarantee that at least some of those 9regulators do not supply anywhere near 1500mApk.

 

[peranders]

If the regulators in mind have no or small heatsinks, the current is very far from 1.5 A

 

[jackinnj]

The NJMXX regulators seem to have better noise stats compared to the 7800 series. Ripple rejection seem to be about the same. This is all datasheet stuff -- fwiw. You could probably tweak up the performance a bit by using an adjustable regulator like the LM317/337 with a 10uF cap on the adjust pin, or go to one of the even lower noise regulators from Linear Tech.

Then it comes to a matter of real estate for a super-regulator -- My smallest super regulator (which is surface mount) still takes up a few square inches -- I don't know what the real estate situ is for PA's. The super-regs also require a bit more overhead so it's not necessarily a drop-in. When I switched to a super-reg in my much-modded Adcom GFP565 the performance improvement was noteable. Did the same thing with a Crown IC-150.

 

[peranders]

I have made a quite small super regulator but I don't have any pcb's left and I don't plan to order any more either

Hypex has a quite small model