Simplistic MosFET HV Shunt Regs

[bigpandahk]

Thank you very much bigpandahk, I'm happy my CCS is going on perfectly well after 10 minutes, old tx & IRF9610 used.

Now what I have to do: connect the rest of quanghao pcb with old tx or try first with Bartolucci tx and after connect the rest quanghao pcb?

congratulation, Merlin, Happy new year.

 

[merlin el mago]

congratulation, Merlin, Happy new year.

Thanks again bigpandahk, I wish a Happy New Year.

 

[stajo]

holliday fun

Hi,

Impressive reading, 2,4 k posts on one subject is what I need to melt all the holliday food

I have som 26s at home, waiting for justification, hence I just did some Mousering/ebaying so maybe i can contribute to break the 3 k wall. Kudos, Salas, V-George and all.

Tea-Bag, maybe a stereoversion w one mirrored?

Best regards and a happy 2012!
Staffan

 

[Tea-Bag]

Tea-Bag, maybe a stereoversion w one mirrored?

Best regards and a happy 2012!
Staffan

CRT does the design, and that's no small feature to ask him.
I'd rather see if we can actually move a few before a re-design - retest etc.

Happy New Year to you all.
May much abundance and health come your way.

 

[merlin el mago]

P2P old tx perfect & solid as a rock

HAPPY NEW YEAR 2012

 

[Salas]

See! 2012's first reg! Congrats.

 

[merlin el mago]

There is no a prize

 

[merlin el mago]

I'm so happy that I don't want to connect the Bartolucci tx today.

 

[Salas]

You don't use any gate protection Zeners, yes? Hmm, let it for another day.

 

[merlin el mago]

Wich type 1N41742A like quanghao schematic?

 

[Salas]

Any 9.3-12V 0.25-0.5W types. Forget D1. Better attach before R1, R6, not after. Tight.

 

[merlin el mago]

As the pic?

 

[Salas]

Yes.

 

[merlin el mago]

Perfect, tomorrow I will buy a batch and connect to the reg before to fire the Bartolucci, thanks again.

 

[bigpandahk]

Maybe you have a 10-15mA application for the nice small one you built? Its a nice looking board. Happy new year to you and to everybody.

Hi Salas

Before there is GB for SSHV2, I would like to modify my SSHV1 for my phono pre with large hintsink for the MOSFET. Can you suggest which component(s) should be change for my application (300V 55+20mA)? Thanks.

 

[Salas]

You have to lower R1 until the voltage across it divided by its value is going to indicate ~70mA. Before that you will have to change your IRF840 heatsink to 2C/W type, your 9610 sink to 4W/C type. Also your 2SK147 fet due to high transcoductance ~40mS is more prone to drift in that hot environment. Try to put a 2SK117GR or 2SK170BL in its place.

 

[quanghao]

Wich type 1N41742A like quanghao schematic?

it is zener diode 12V

 

[quanghao]

Hi Salas!

I try use 2SK117, it is better than 2Sk170 in SSHV 1.

Thanks

 

[bigpandahk]

You have to lower R1 until the voltage across it divided by its value is going to indicate ~70mA. Before that you will have to change your IRF840 heatsink to 2C/W type, your 9610 sink to 4W/C type. Also your 2SK147 fet due to high transcoductance ~40mS is more prone to drift in that hot environment. Try to put a 2SK117GR or 2SK170BL in its place.

Thanks Salas. Will do the modification in this week and let you know the result.

 

[merlin el mago]

Using Bartolucci tx Vin 280V Vout max 131V, I need Vout 260V, measurements done loaded with Puresound MM.