• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Solid state HT regulator??

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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
 

amperex

Member
2005-02-20 1:42 pm
MI
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.
 
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
 
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