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-   -   Allo volt+d custom powersupply, and am questions (https://www.diyaudio.com/forums/class-d/359786-allo-volt-custom-powersupply-am-questions.html)

Xqzme 6th September 2020 09:53 AM

Allo volt+d custom powersupply, and am questions
 
Hello!
I've just bought the Volt+d, and will be using it with my B&O RL60.2(so far so good).


I'm not the biggest fan of the translucent case it comes in, and would rather make a nice wooden/brass box to fit it inside. I'm also considering making an on/off switch, and put in a nice toroidal ring transformer I have salvaged from some quality gear, which both have a 12v and 24v output.


My question is, could I connect the transformer right to the amp, or should I put anything in between ?


Would a toroidal transformer be better or worse than a laptop power supply?


Should I shield the amp from the transformer ?


And finally, how would I know which settings I should use for the AM bandwidth avoidance circuit..

Yatsushiro 6th September 2020 10:02 AM

A transformer provides AC voltage, your amp requires DC voltage; do not connect them directly.

Xqzme 6th September 2020 10:05 AM

Thank you, could probably have found out looking at the transformer first.. Anything important to look for in a conversion module ?

Yatsushiro 6th September 2020 10:32 AM

You need a full wave rectifier, but need to watch out for ripple and rectified peak voltage (The Volt +D has an absolute max of 30v)

Someone far more knowledgeable than me will come along shortly, but in the meantime:

Full Wave Rectifiers | Electrical4U

Xqzme 6th September 2020 10:44 AM

Thank you Yatsushiro, that was some of the most educational I have read on a Sunday!

jasonhanjk 7th September 2020 01:14 AM

The no load peak voltage after rectify must not exceed 30V. You need a scope to check it.

Otherwise just get a 24V 3A SMPS.


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