Simplistic MosFET HV Shunt Regs

[merlin el mago]

Transformers wired 4,25:1 stepdown as I told you before.
Try to think about it when you relax!

Definitely yesterday was very very tired, I'm sorry for misunderstanding about TVC gain but I know there is some TVC with gain....

 

[nicoch58]

Quote from Dave about TVC

"Yes, some people report good results but be aware that wiring for 6dB of gain means that the source will see only 1/4 the inductance of the full winding. Stacking the core with more interleave will recover the lost inductance, though the ultimate success may depend on your system and your requirements."

 

[merlin el mago]

Do you know or post a link how to be wired for 6dB of gain?

 

[vgeorge]

Felipe,

do you need that extra gain? Also don' t forget that output impedance will go up with 6dB gain.

 

[merlin el mago]

George,

Do you know the output impedance setting to 6dB gain?

Have you played with different inductance in yours TVC?

 

[vgeorge]

1)it depends on the output impedance of the stage before the TVC. How much lower, better ask Thomas Mayer who is an expert on this.
2)no, as I couldn' t find a reason to increase the inductance.

 

[merlin el mago]

1/are the Lundhals
2/I assume you don't need more gain or inductance, how do you know if you need or don't need more inductance?

 

[Salas]

""
""...You bridge the points of psu interest in the audio circuit...""...not quite understand exactly...please explain a bit more....

Cheers....

If you got two B+ local points to feed for two tubes, link them and put F+,S+ as a midway node for example.

 

[nicoch58]

ask Dave Slage intactaudio ....

 

[merlin el mago]

I will ask, thanks.

 

[king4joy]

Salas...I have closed circuit at the branch point, and made connections to the 2 tube with equal lengths (14 inches) wires....work out perfect....thankyou.

 

[vgeorge]

1/are the Lundhals
2/I assume you don't need more gain or inductance, how do you know if you need or don't need more inductance?

1)with the #26 tube expect around 300Ohm with ll1660 wired 4,25:1
2)intact audio

 

[merlin el mago]

George how do you wired the TVCs, like attached pic

 

[Salas]

Where to take the TVC dialogue so to be useful for members looking for? #26 thread? Here is OT, nobody will look for TVC in the PSUs forum.

 

[merlin el mago]

I'm sorry Salas

 

[RollE2k]

OK, so i had my SSHV2 up and running on my testbed. Did some modifications to my DC-filter (new choke) and plugged it back. Accidently the output positive twisted wires was loose and i got a short circuit between the positive and negative.
I powered off, and it didn't look like anything was damaged. Except when i powered on i had ~13.5v output, and after maybe 5 sec, the R1 burned.
I don't see any visible damages to any other components, but something must be broken. Maybe any diode? any idea where i should start, or what i first should check?
I'm thinking about putting a 12v input and ground it a the testpoint, just to check the CCS-part first..

 

[Salas]

That's a good idea to test the CCS first, it shouldn't be left running after the fault. I would test/change Zeners and JFET first.

 

[RollE2k]

Thanks alot Salas, have to do that tomorrow then, probably not that hard to fix - but it is always good to have any idea where to start!

 

[Salas]

Did it spark when it shorted loosely by the way?

 

[RollE2k]

Yes it did spark, any idea more exactly what probably have been damaged?