Simplistic Mosfet HV Shunt Regs

[merlin el mago]

I used 6VAC tx for the AZ1 heaters and between the 6VAC hot to AZ1 1R in series to lowered to 4VAC, I measured to check and I have 4,9VAC instead 4VAC, I changed to 2R and now I have 4VAC at the AZ1 heaters the issue is fixed.

[Salas]

You know something weird, I had it in mind to ask what is going on with heaters next. Good. I wanna see picture of 80 yrs old AZ1 mesh plate glow over SSHV2.

[Salas]

Originally Posted by 10y

Hi,

What is the right resistor value in order to set ccs of my salas HV shunt reg for a current value of about 30 mA ?
I would supply two #26 at 5,5 mA max each. I have two 30 ma choke on HV line in a c-l-c-l-c configuration and would not saturate them . As I also have other two spare similar 30 ma choke, can I put them in parallel in order to increase max current value?

Thanks for your helps!

Anto

If its the one with single mosfet and 3 leds CCS start with 68R. That one is SSHV(1). SSHV2 has a trimmer, 2 mosfets, a test point, and no leds in ccs.

Yep, parallel the chokes. But maybe you don't wanna spare all your valuable chokes since the reg is gonna cut much ripple too. Maybe just c-l-c one cell is enough.

[10y]

Originally Posted by Salas

If its the one with single mosfet and 3 leds CCS start with 68R. That one is SSHV(1). SSHV2 has a trimmer, 2 mosfets, a test point, and no leds in ccs.

Yep, parallel the chokes. But maybe you don't wanna spare all your valuable chokes since the reg is gonna cut much ripple too. Maybe just c-l-c one cell is enough.

Thank you Salas, I was talking about SSHV (1). So will start with a c-l-c configuration with two parallelled choke for a 60 mA current max and 68 R ccs value. Is also possible to reduce current ccs consumption to a value below 20 mA? Thinkin' about tu use two SSHV1 in a single HV rail and stand below 30 mA max.

Originally Posted by Salas

I wanna see picture of 80 yrs old AZ1 mesh plate glow over SSHV2.

You will see the mine soon

Anto

[merlin el mago]

Originally Posted by Salas

You know something weird, I had it in mind to ask what is going on with heaters next. Good. I wanna see picture of 80 yrs old AZ1 mesh plate glow over SSHV2.

Yes Sir

[10y]

Originally Posted by Salas

If its the one with single mosfet and 3 leds CCS start with 68R. That one is SSHV(1). SSHV2 has a trimmer, 2 mosfets, a test point, and no leds in ccs.

Yep, parallel the chokes. But maybe you don't wanna spare all your valuable chokes since the reg is gonna cut much ripple too. Maybe just c-l-c one cell is enough.

Thank you Salas, I was talking about SSHV (1). So will start with a c-l-c configuration with two parallelled choke for a 60 mA current max and 68 R ccs value. Is also possible to reduce current ccs consumption to a value below 20 mA? Thinkin' about tu use two SSHV1 in a single HV rail and stand below 30 mA max.

Originally Posted by Salas

I wanna see picture of 80 yrs old AZ1 mesh plate glow over SSHV2.

You will see the mine soon

Anto

[merlin el mago]

Mine is Siemens, what's your AZ1?

[10y]

sorry for the double post

[10y]

Originally Posted by merlin el mago

Mine is Siemens, what's your AZ1?

Hi Merlin,

see the pic.

I have another valvo 1938 az1 mesh plate.

Ciao

[merlin el mago]

Ciao,

Looks really good, Valvo are considered by many the best AZ1 mesh plate ever made so please pic of Valvo.

Cheers
Felipe