Tube DIY Asylum

Indeed

161.69.65.45

Bas Horneman

In Reply to: RE: I see some minimal reactance psu elements? posted by Chip647 on November 29, 2023 at 14:13:03

I was referring to an element...that was copy pasted from a typical minimal reactance psu. CCS + VR, As you mention in this case that element was placed after the rest of the psu.

Normally small cap after the rectifier then CCS + VR.

Follow Ups:

RE: Indeed - Tre' 18:39:10 12/21/23 (0)
I do a full critical inductance LCLC then a CCS into a VR tube.

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
RE: Indeed - pix 11:04:48 11/30/23 (0)
I thought the CLC filter was needed before the ccs/vr reg to keep the ripple down.
I could easily move the ccs/vr reg to just after the first (22uF) cap, if this is worth trying.

As for the pp output stage, I don't see the need for a regulated psu.
At least, it would have to be built with higher degree of complexity than this simple ccs/vr regulator.
RE: Indeed - pix 07:07:36 11/30/23 (3)
I thought the CLC filter was needed before the ccs/vr reg to keep the ripple down.
I could easily move the ccs/vr reg to just after the first (22uF) cap, if this is worth trying.

As for the pp output stage, I don't see the need for a regulated psu.
At least, it would have to be built with higher degree of complexity than this simple ccs/vr regulator.
- You could also try something like this - Chip647 12:14:53 11/30/23 (2)
  Technically a capacitance multiplier. Still using the VR tubes, the MOSFET works as a source follower and can be any of a number of high voltage MOSFET (IFR720, IFR820, IFRBC20PBF).
  
  The 1 meg resistor buffers the VR tubes from the capacitor, they are only used as a voltage reference for the gate of the MOSFET. It also ramps up the output voltage.
  - RE: You could also try something like this - pix 10:29:53 12/02/23 (0)
    Thanks Chip
    I'll take that under consideration
    Br
  - RE: You could also try something like this - pix 13:03:02 11/30/23 (0)
    Thanks Chip
    I'll take that under consideration
    Br

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