9 volt wall wort output questions.

[Tokin]

I bought a modified Bird meter with the 2x 5x 9 volt multiplier. I started testing some 9v units I had in a box and they were reading 11.4 - 14.6 volts. Is this typical? Is there that much voltage loss in these wall units?
Am I right to be concerned about replacing the 9v battery with a wall wort testing at 14.6? 11.4 seems more acceptable.

 

[kopcicle]

No load regulation with most wall warts is KRAP.
That and most wall warts are RF noisy .

 

[Tokin]

I see a stack of power supplys in my future lol.

 

[groundwire]

No load regulation with most wall warts is KRAP.
That and most wall warts are RF noisy .

Bingo

 

[kopcicle]

New I see a stack of power supplys in my future lol.

If there is the slightest question of interference go linear supply.
If you absolutely have to use switchers check around first or use converted server supplies. Some of the azzhat switchers can be choked into silence but not all.

Start out small and follow a well traveled path before you start designing your own power supply path. It will save time , $$$ and aggravation .

 

[Tokin]

So I should be ok running that 9v mod at 11.4v?

 

[groundwire]

I wouldn't. Why risk an expensive bird for a five dollar wall wart? Use batteries or spend the money and get a quality 9vdc supply. Personally i would just suck it up and use batteries, birds aint cheap