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Author Topic: Board for WA1GFZ MOSFET Audio Driver  (Read 78096 times)
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AC0OB - A Place where Thermionic Emitters Rule!
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« Reply #150 on: May 16, 2019, 02:18:08 PM »

I have extra boards on the way so I will build one of each to see. Yes, I did mention the desire for a soft start, however that may no longer be necessary.

50mv is quite good.

Transformer secondaries can be phased. They are completely independent.

Here is the final schematic/bom and the board that I ordered. I kept the 130V and 150V Zeners in the BOM as 140V Zeners were not available from Digikey.


Considering the transformer secondary resistances in conjunction with the 470 uF filtering caps and the resulting time constant, I doubt the soft start circuit is going to buy you much.

Personally, unless there is some major criteria for safety or operation, I want my regulators to start regulating as soon as my raw power supply hits the regulation voltage threshold.


* 280V Regulator with Zeners Only.pdf (45.06 KB - downloaded 368 times.)

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« Reply #151 on: May 20, 2019, 08:00:33 PM »

6 days from order to boards in my hands, from china. Unreal.
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