[sdiy] Converting a DC adapter to AC only...?

[Bob Weigel]

Usually it's just fine and dandy.  Normally there is plenty of headroom 
for heat dissipation for an extra volt or so.  But watch it.  Some high 
current rated supplies will soak down when you load them to the rated 
voltage but if you run them on a circuit that doesn't load much, they 
might have 20V and that could bake something. -Bob
Gil W. wrote:

>Well, on the DC adapter I have here I can take either 10v or 13.5v from the secondary, while the unit asks for "12v AC" - can I safely use the 13.5v winding as output, assuming that the rectifier inside the unit can take more than 12v and convert to what it really needs,
>or should I better use the 10v as input ?
>
>Thanks
>
>--- On Thu, 9/25/08, Brian Castro <briancastro2 at gmail.com> wrote:
>
>  
>
>>From: Brian Castro <briancastro2 at gmail.com>
>>Subject: Re: [sdiy] Converting a DC adapter to AC only...?
>>To: gil_we at yahoo.com
>>Cc: "synth-diy at dropmix.xs4all.nl" <synth-diy at dropmix.xs4all.nl>
>>Date: Thursday, September 25, 2008, 8:27 PM
>>You would have to crack it open and remove the rectification
>>diodes and the
>>smoothing capacitor so the secondary winding (12vac) on the
>>transformer goes
>>straight to the output.
>>
>>On Thu, Sep 25, 2008 at 9:02 AM, Gil W.
>><gil_we at yahoo.com> wrote:
>>
>>    
>>
>>>I got an old BOSS effect unit which required 12V AC to
>>>      
>>>
>>be able to
>>    
>>
>>>operate...
>>>
>>>I know you can make an AC only adapter by converting a
>>>      
>>>
>>DC adapter...
>>    
>>
>>>Any directions of how it can be done please ?
>>>
>>>
>>>
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>>>Synth-diy mailing list
>>>Synth-diy at dropmix.xs4all.nl
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>>>
>>>      
>>>
>
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