kathodyne said:hi!,
i have a few books were they use regulated hv...i could copy these schematics for you...
they use bd140
if you like, say so....
Would appreciate it. Thanx

Reason why I don't want a tube version, lack of space inside box for additional tubes/trafo's.
Hi,
AFAIR VB408 is out of production and definitely is unobtanium over here in Germany.
Tom
Also, where can I find VB408 or HIP5600 regulator IC's? [/B]
AFAIR VB408 is out of production and definitely is unobtanium over here in Germany.
Tom
hi
check my 300volt regulator
www.loginnovation.com/jeapel
-the RC time 47k and 22 uF give a long RC for
a very good filter out the ripple
-for one step better you can boost 22uF to 50 to 100uF
-i don t like hv regulator with IC because IC work with
negative feedback and feedback==possibly voltage
overshoot and possibly unstable
-the source follower regulator work very well and
is fulll proof stable
bye
check my 300volt regulator
www.loginnovation.com/jeapel
-the RC time 47k and 22 uF give a long RC for
a very good filter out the ripple
-for one step better you can boost 22uF to 50 to 100uF
-i don t like hv regulator with IC because IC work with
negative feedback and feedback==possibly voltage
overshoot and possibly unstable
-the source follower regulator work very well and
is fulll proof stable
bye
The TL783C is a three terminal IC type regulator that was designed for high voltage. I do not remember the specs, but have 100-150 in stock.
Update: This IC regulator (positive output) has a 125 VDC rating. I understand it can perform with a difference of 125 VDC or be floated up in voltage above ground for a differential of 125 VDC input to output.
In other words, it should perform well with an input of say 350 VDC & an output of 250 VDC.
Update: This IC regulator (positive output) has a 125 VDC rating. I understand it can perform with a difference of 125 VDC or be floated up in voltage above ground for a differential of 125 VDC input to output.
In other words, it should perform well with an input of say 350 VDC & an output of 250 VDC.
jeapel said:check my 300volt regulator
www.loginnovation.com/jeapel
-the source follower regulator work very well and
is fulll proof stable
I like this 1, work well indeed

Got one question:
My supply is 330v dc and I need 300v on output, after regulation.
What component values must I change - to what?
The gate ref. zener maybe?
hi
the regulator should be work for you but if i follow
my design rules :
1-vin=330v is it with the load(tube circuit) connected
because vin-vout=30v and it s a minimum for my
otherwise change down your vout
2-normally i put 2 to 3ma on zener
3-in my case: zener current=(400-300)/47000=2.1ma
in your case: zener current=(330-300)/47000=0.6ma
it s working but a little too low
change the 47k for: (330-300)/.002=15kohm 1 or 2 watt
4-for good hum rejection my rc time=
47000*22uF=1sec.
change 22uF for maybe 66uF
15000*66uF=1sec.
good luck
the regulator should be work for you but if i follow
my design rules :
1-vin=330v is it with the load(tube circuit) connected
because vin-vout=30v and it s a minimum for my
otherwise change down your vout
2-normally i put 2 to 3ma on zener
3-in my case: zener current=(400-300)/47000=2.1ma
in your case: zener current=(330-300)/47000=0.6ma
it s working but a little too low
change the 47k for: (330-300)/.002=15kohm 1 or 2 watt
4-for good hum rejection my rc time=
47000*22uF=1sec.
change 22uF for maybe 66uF
15000*66uF=1sec.
good luck
Look at this thread.
http://www.diyaudio.com/forums/showthread.php?s=&threadid=61831
This is a tried and proven design.
Cheers,
Ian
http://www.diyaudio.com/forums/showthread.php?s=&threadid=61831
This is a tried and proven design.
Cheers,
Ian
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