[sdiy] getting 16 volts AC? and does DC ruin AC circuits?

[Scott Gravenhorst]

If the amplifier creates a dual supply using halfwave rectifiers, it won't work because only one of
the supplies will come up (I'm not saying that it is a dual supply made this way, but it
could/might be.).  If the input power connects to an internal transformer it won't work and could
damage the external supply.  Hard to say for sure without a schematic whether it might be damaged.
 If the input has a transformer, and at such a low input voltage, I'd guess it doesn't, if enough
current were pushed it might heat it up too much.  However, if it's a single power supply, it might
actually work with a DC supply, but it has to be wired correctly and be in the correct voltage and
current range.

12V is only 3/4 of 16V.  That would be like a brownout on mains from 120v to 90v.  It _might_ try
to work, but I wouldn't expect it to work well and it will probably seriously tax the 12VAC xfmr.

Dan Snazelle <subjectivity at hotmail.com> wrote:
>
>
>
>Ok
>
>this is a two part question...
>
>I am trying to fix a PEAVY filter for someone that came in with a 
>DC adapter. It however states on the side of the unit that it 
>takes 16-15.5 VAC. 
>
>1 AMP
>
>
>I have a bad feeling he tried hooking it up to this DC adapter which states on the back
>16 volts 3.5 amps max switching mode regulated supply (which 
>sounds like a DC output to me) 
>
>I did all the other repairs before i even plugged the unit in 
>(two broken pots and a dead battery) and now i am worried that if 
>he DID mess it up with a DC input, then the damage could be way 
>more extensive. 
>
>So..I am trying to find a way to supply 16 v AC to the unit...i 
>dont have any adapters of that type,,,only DC...and i have a 12v 
>AC adapter. which i think is far too low for this applicaton. 
>
>any ideas??
>
>thanks so much
>
>
>--------------------------------------------
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>
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>
>(updated monthly)
>
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>
>
>
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>
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>
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>
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>
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>
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>
>www.youtube.com/watch?v=V4nJPjGgOcU&feature=channel_page
>
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-- ScottG
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-- Scott Gravenhorst
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