HV Shunt Regulator PCB

[Bas Horneman]

Here is the pdf for the hv reg. My old site is down. So I've put it up here.

http://www.basaudio.net/datasheets/hvreg.pdf

 

[leif christensen]

300B b+

hello
are there any reasons for not implementing this in an all out 300B design feeding the 330B b+ in a LCLC config?
already have the SuperReg on the 6s45 driver b+
any mods needed?300 B runs @75mA neg bias around -95vdc Tommy Hørning OPT
best
Leif
Norway

 

[bambadoo]

Har anyone built these with any success? I have 4pcbs unpopulated for the time being.
Still wondering if I shall finish them.

 

[bambadoo]

i guess not......

 

[leif christensen]

Heat issue on FET

hello again! ?
planning to run this with 75mA@410-420vdc to 300B b+
have discussed the implementation of this reg. on a Norwegian forum, and there has been suggested that heat dissapation from the FET might be an issue;
would a possible solution be to parallell 2 FETs, to bring the heat down on each?
could no 2 be "mirror fixed" on the underside of the pcb with it own heatsink?
opinions anyone?
best
Leif

 

[Audiohifi]

No problem
Go ahead and build

i guess not......

 

[Luke]

Hi I was wondering who have finished their HV Shunt Reg boards and have them working properly without Oscillation.
What op amp did you use? Anybody get this board to work properly (no oscillation) with the OPA656 op amp?
Thanks, Daniel

Dan, did you ever build and get this reg working properly?

 

[Audiohifi]

I use OPA655 Dip now discontinued I think
OPA656 is surface mount

 

[Algar_emi]

I got a few requests lately for this PCB. I'll make a small run of 10, at 25$ each + shipping and 3%PayPal fee. I already have 4 sold. Let me know at bergeron.syl@videotron.qc.ca.

Thanks...

 

[Algar_emi]

Four PCB to Gilwintan
two to jormajj

Only 4 PCB left...
Let me know.

Thanks.

 

[Josep]

PCB

Four PCB to Gilwintan
two to jormajj

Only 4 PCB left...
Let me know.

Thanks.

Hello,

Are the pcbs still available?

Thanks

 

[pinnocchio]

Did anyone compared it to Salas's SSHV2?

 

[Algar_emi]

Hi. I have a new batch of PCB available. Quantities are limited. Send me a private email for details. Thanks.

 

[Algar_emi]

Pinnocchio you have mail. Orders are starting to fill in. I ordered just a small batch so if you want the PCB this is your chance.

 

[pinnocchio]

Sorry, I'll have to pass this time...

Starting a new project so my Tubes will have to wait some more...

Thanks for making this available to the DIY community

Do

 

[Algar_emi]

PCB received today. Only 18 left. Send me an email if interested. Thanks.

 

[Algar_emi]

Selling fast, only 12 boards left. Send me a private email if interested. Bye.

 

[Algar_emi]

All kits where shipped today. At the current rate of sale, I'm planning I'll have PCB available for only 2-3 more guys...

 

[Algar_emi]

Only 10 PCB left...

 

[lordvader]

Hi.
I was hoping someone could help me trouble shoot this circuit ?

The board passed the 15V only tests fine. When I apply the HV, things go pear shaped.

I followed the test steps.

When I power on, I get no voltage reading across R12 (it's supposed to be 250mV). Furthermore, adjusting R3 does not alter the VReg.
After poking about with my multimeter, I got the following readings at the opamp :
pin 2 = 7V (fine)
pin 3 = 1.2V (wrong !!!)
pin 6 = 0.9V (correct for mostfet shunt)
pin 7 = 10.6V (correct)

Checking other voltages, the voltages immediately after T2 are way low. RAW DC coming in about 300V, but after T2 the voltages are 65V.
What should the initial position of R3 be ? The documentation has no mention of a default value ...

A big but though ... For about 5 seconds after initial power on, everything looks like it's going to behave, with realistic voltages at the outputs, but then they suddenly drop.

If there's any more info you require, let me know.
I'm at my wits end !