Keantoken's CFP cap multiplier

[alexkosha]

I would like 4 too.


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[mravinsky]

The same for me: 4 boards

 

[vgeorge]

4 for me too please

 

[mravinsky]

Payment sent for 4 boards
Thank you very much!

 

[RCruz]

You have PM.... thank you so much

 

[schmike]

I think the VH10 should be fine. If you can't get the 2SC5171, try the 2SC4793 or D45H11.

Dear keantoken
If I want to built the 21v output 7A
Which BJT can I choose?
thanks alot

 

[keantoken]

If you want to try an untested version, I can give you a schematic. There is no tested version for that much current. It would need 6 transistors, half BC337-40 and half D45H11G.

 

[schmike]

If you want to try an untested version, I can give you a schematic. There is no tested version for that much current. It would need 6 transistors, half BC337-40 and half D45H11G.

yes
I can test it
can you send it to me?
i pm my email to you
thanks

 

[keantoken]

I sent out the KMs a few days ago, they should start arriving for those in the US. Those in other continents will probably wait a bit longer. There's still 14 PCBs left.

 

[CeeVee]

Hi Keantoken...i will have 4 please

 

[alexkosha]

I got my PCBs today. Thank you. I see no space for any diodes. And also little curiosity about C2 and C4.
Can you please update us with latest schematics for that PCB?


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[Destroyer OS]

Mine appear to be the same as schematic minus the diodes. He told me they don't do anything even though they were meant to be protection.

Are you asking if you switch between the caps for different rails?

 

[schmike]

I think the VH10 should be fine. If you can't get the 2SC5171, try the 2SC4793 or D45H11.

Dear Sir,

I find that the 2SC5171 is NPN but you suggest to me is the PNP
Can you suggest the NPN to me.
Is it D44H11G?
Thanks alot.

 

[keantoken]

Yes, that's it.

 

[keantoken]

Here is a schematic to go with the PCB.

 

[alexkosha]

Thank you a lot for schematics with all these details. Is any benefit to add 10uF film cap (Wima) to Ele caps and if "yes or probably yes" then to which one?


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[keantoken]

A 10uF film cap would not hurt anything if you want to add one. I like the fat 5mm Wima 50V 10uF.

 

[alexkosha]

I have these in my home stock. Limited to 50VDC but nice small size.. What position Ele cap will be more thirsty with that decap? Input and output? Or all?


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[keantoken]

It would probably do the most good filtering at the input. It probably wouldn't help C1 and C2.

 

[alexkosha]

Got it. Thank you.


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