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i'm on a roll... the kgsshv


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At least someone is looking at it...

Please check again for more errors.

PS board.

Not connected to the GND .

> R14(2.2K) & R15(100), C7 & C8 (4,700uF) , R9(300K), U3(7815), U4(7915)

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Not sure if we have a KGSS thread but I'll just post this here.  So last year it dawned on me that I built my first KGSS amp 15 years ago and something had to be done to celebrate that.  It started of

Here's my KGSSHV build to offset all the fantastic, professional-looking ones posted in this thread (milling your own front plate?!).  I had an old computer case lying around, so used that as the chas

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Well the ps board was not updated for some reason, all those should be fixed now.

The wiper on the pot is the center pin, and as a two wire device it really does not matter

which end its tied to ??

The connectons to ground are hard to see in the jpg's.

here are the pdf's

http://gilmore.chem.northwestern.edu/kgsshvamp3.pdf

http://gilmore.chem.northwestern.edu/kgsshvps.pdf

Edited by kevin gilmore
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K. Gilmore stated:-

475 volt windings... 2 of them, completely seperated. 39 watts each

30 volts center tapped 10va

475V @ 39 watts is only 8.2mA. ....?

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Spritzer posted:-

I'd spec the transformer at 100mA for some extra headroom but I like to overbuild... :cool:
.

Way to go, Spritzer. I like it....

More power for the peeples....

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  • 2 weeks later...

i'm thinking seriously of doing a version of the board with a simplified current source that performs just as good

(1000 volt ixys part, thanks marc) and with standup heatsinks. Will make it lots easier and cheaper for

people to build it. Power supply will be the same thing. Hopefully will get started on it friday.

Will cut the power supply voltages to +/-450 just to make sure the current source has a bit of headroom.

if anyone knows of a depletion mode fet that does more than 1000 volts and will run at 1ma, let me know.

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i'm thinking seriously of doing a version of the board with a simplified current source that performs just as good

(1000 volt ixys part, thanks marc) and with standup heatsinks. Will make it lots easier and cheaper for

people to build it. Power supply will be the same thing. Hopefully will get started on it friday.

Will cut the power supply voltages to +/-450 just to make sure the current source has a bit of headroom.

if anyone knows of a depletion mode fet that does more than 1000 volts and will run at 1ma, let me know.

High voltage depletion mode JFET

http://www.semisouth.com/products/uploads/DS_SJDP120R085_rev1.0.pdf#search=%27SJDP120R085%27

but it is too big... :(

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