Simplistic MosFET HV Shunt Regs

[Salas]

Yes.

 

[merlin el mago]

Thank you Salas I will order the heatsink & the dummy load to RS.

 

[j45yip]

...managed to check on the 3 LED's orientation and they are fine. Replaced the IRF9610 and removed the D1, 1N5383A. Fired it up and got Vout of 281V from 298Vin.
QH, thanks for your help.

LED does not light, then the CCS is your problem!
Check to see if connection led the wrong vacuum?
ie the opposite direction!

 

[regal]

Salas what do you think about using this regulator to provide cathode bias on a DC coupled amp, in order to avoid bypass caps?

The reg would provide cathode bias around 100V to the cathode of a 45 SET. I can't predict how it would handle sinking current instead of sourcing it?

 

[Salas]

Wrenchone had made a small amp like a Red Light District but with a shunt instead and it worked. Mighty something its name? Have a search in the forums. Maybe he took it to burning amp once, not sure.

 

[merlin el mago]

BTS

 

[Salas]

Make your self clear senior. What all those emoticons mean? Pictures, application, what PSU before, why so happy, what is so different.

 

[quanghao]

...managed to check on the 3 LED's orientation and they are fine. Replaced the IRF9610 and removed the D1, 1N5383A. Fired it up and got Vout of 281V from 298Vin.
QH, thanks for your help.

Good!
i not say you use Zener 150V!
What is the sound??

 

[merlin el mago]

I am very happy

Make your self clear senior. What all those emoticons mean? Pictures, application, what PSU before, why so happy, what is so different.

Yes I never suspected this kind of change using a shunt regulator for B+ (you can see I'm newbie), application: pre-amp SRPP 6922, mains Tx custom made secondaries 240V & 8.5V far better than Audionote, about reg. nothing special it's a Quang Hao SSHV pcb, about components useds:

PSU
UF4007 diodes
Nichicon UVY2W221MRD 220uF / 450V caps
1W carbon film
5W Kiwame

REG
1W carbon film
2W & 5W Kiwame
1K trimmer Bourns
100uF 50V Pana FM
1uF 450V Auricap

MOSFETS & TRANSISTORS
IRF9610
MJE350
IRF840

JFET
2SK170BL

Chassis wire: Cardas 17,5ga

Potentiometer Noble 100K or 50K I have both but surely will be definitive 50K.

The sound: incredible low deep and marked, mid sublime and high sweet and soft as the velvet never before heard so real the piano and Patricia Barber's voice, the voice of Ella Ftizgerald and Carol Kidd.

BTS = better than sex......

 

[massimo]

BTS = better than sex......

Never! Neither audio nor a fantastic goal scored by Messi, Villa or even Eto'o could be better than s...

 

[merlin el mago]

Never! Neither audio nor a fantastic goal scored by Messi, Villa or even Eto'o could be better than s...

Are you sure? is not the same sex with Beyonce than with Madonna.....

 

[massimo]

....and Patricia Barber's voice......

BTW, two new P.B. 45 rpm LPs are going to be released by MoFi (OMR) soon.
Nice Xmas presents!

 

[Salas]

Congratulations then. What was used originally? A CLC?

 

[massimo]

Are you sure? is not the same sex with Beyonce than with Madonna.....

I was thinking about different "material"

 

[massimo]

OT Hi Salas, did you change your avatar?
From "ancient Greek art" to modern art: a Greek frappè!
Θα το ήθελα σκέτο με γάλα, παρακαλώ
(I would like it white, no sugar please)

 

[merlin el mago]

Congratulations then. What was used originally? A CLC?

Worst a CRC 220uF 15k 220uF.

 

[merlin el mago]

BTW, two new P.B. 45 rpm LPs are going to be released by MoFi (OMR) soon.
Nice Xmas presents!

Thanks for the input Massimo.

 

[merlin el mago]

I was thinking about different "material"

Just supposed.

 

[Salas]

OT Hi Salas, did you change your avatar?
From "ancient Greek art" to modern art: a Greek frappè!
Θα το ήθελα σκέτο με γάλα, παρακαλώ
(I would like it white, no sugar please)

That was Henri Matisse, a famous ''fauve'' French painter.

 

[Salas]

Worst a CRC 220uF 15k 220uF.

Too basic, indeed.