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Old 10th June 2020, 02:54 PM   #2341
vdi_nenna is offline vdi_nenna  United States
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What's next for release from PassWorks?
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Old 27th October 2020, 09:06 AM   #2342
daniboun is online now daniboun  France
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Hi amigos,

I am in the process of assembling a new Pass A3 Amplifier. I come from Class D world....
I would like to avoid to use a Toroidal PSU for my modules, so question for experts :

Can I plug a SMPS Dual rail 28-0-28V VDC instead of the required Todoidal PSU 20-0-20 VAC for this module that already includes a rectifier ? (20 VAC = 28 VDC)

I guess I would only risk a Diod loss and nothing else ?


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Old 27th October 2020, 09:21 AM   #2343
Zen Mod is offline Zen Mod  Serbia
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you can, but better to use 24V - 0 - 24V , which is value of original rails

besides that, some switcher PSU are not liking to see excessive capacitance amount afterwards, so you must try it .......
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Old 27th October 2020, 09:47 AM   #2344
daniboun is online now daniboun  France
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you can, but better to use 24V - 0 - 24V , which is value of original rails

besides that, some switcher PSU are not liking to see excessive capacitance amount afterwards, so you must try it .......
I f I understand, the only risk would be that the module does not work? I just want to avoid damaging the module
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Old 27th October 2020, 10:37 AM   #2345
Zen Mod is offline Zen Mod  Serbia
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most of them are having internal protection

in worst case, it'll refuse to start

if needed, you can solve that inserting some small resistance or inductor , between SMPS and cap bank
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