RME LNI-2 DC honest talk

[FrantzM]

If you search for RME linear power supply, there are several vendors making money selling pointless upgrades to an already extremely well measuring and performing device. Perhaps RME thought "if customers feel they need such a thing, it would be better if we designed it, so that it properly compliments the internal regulators in our kit".

May I suggest an edit:

If you search for RME linear power supply, there are several vendors making money selling pointless upgrades to an already extremely well measuring and performing device. Perhaps RME thought "if customers feel they need such a thing, it would be better if we sell one, so that we can increase our profits a bit

Peace.

 

[KSTR]

TRACO THM 15-1212
Ripple and Noise: 75 mVp-p typ
Leakage current: less than 2.5 µA

Considering that galvanic isolation is more important than actual output characteristics, are you satisfied with this module? Have you measured its efficiency?

No. I trust TRACO's specs wrt efficiency. I've actually used the 15V output model simply because I had it already. I also added additional input and output caps (10uF MLCC) and some RCR-filtering (2x 0.47R + 470uF e-cap + 2x 0.47R to reduce any chance of CLC ringing, the L being the cable. ;-)

 

[KSTR]

May I suggest an edit:

we sell one, so that we can increase our profits a bit...

Peace.

... and re-invest it elsewhere.

Of course, that's the whole idea behind setting-up a company in the western world.

 

[Bob from Florida]

Friends, does this look like a good candidate as a competitor for LNI-2?
View attachment 396039

Take a look at this video of a comparable lithium battery being disassembled. You will discover that these type batteries maintain voltage via internal regulator circuits. These are highly unlikely to be an improvement over your existing power supply.

If you really want to use battery power, get an AGM Odyssey battery.

 

[johny_2000]

Take a look at this video of a comparable lithium battery being disassembled. You will discover that these type batteries maintain voltage via internal regulator circuits. These are highly unlikely to be an improvement over your existing power supply.

I'll be using this 18650x6 12V Li-Ion power bank. I checked the wiring and made sure that power from the batteries was going directly to the DC output jack using the rocker switch. The remaining components on the PCB serve as a battery level meter (LM339 + 5 LEDs) and a step-down DC/DC converter for the USB-A 5V output.

 

[Bob from Florida]

I'll be using this 18650x6 12V Li-Ion power bank. I checked the wiring and made sure that power from the batteries was going directly to the DC output jack using the rocker switch. The remaining components on the PCB serve as a battery level meter (LM339 + 5 LEDs) and a step-down DC/DC converter for the USB-A 5V output.

View attachment 396236 View attachment 396235

Still, very unlikely to make any difference. The internal power supply regulators in the RME are what matter. Unless the external supply is sending ground loop hum, the battery won't change anything. Batteries are very handy when running off "the grid"....

 

[johny_2000]

In a couple of days I will measure all three power sources - factory power supply, LNI-2 and battery power, under the same test conditions.