Improved power supply

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From: Randy (randy@cyphyn.radnet.com)
Date: Wed Jan 12 1994 - 21:36:46 EST


Finding a need for regulated 100vdc, I added a zener diode to the '150volt'
power supply I posted some time ago.

The extra diode is to prevent any voltages (like form a charged cap or a
mis-wired, experimental somthing) from getting back to the zener.

This also uses the full current capability of the transformer

FRS Transformer is # 115-2045 pg 12 WS-93 cat
    Choke, 8HY is # L3/SG15 pg 14 WS-93
    Caps are on page 11 sorry for forgetting this before

Power supply for small tube ckts 150vdc 100ma, 100v 40ma reg & 6.3vac 6a.

                        100v 40ma
  + 150v B - + 6vac
  o o o o o
  | a k | | | |
  +-/\/\/--->[----+ | | |
  | 15k led | | | | Caps, choke and Xformer and 4x
  | 2 watt | | | | 1N4007 diodes all from F.R.S.
  | | | | |
  +-----)(--------+ | | | diodes to make bridge ckt, with
  | + 360uf | | | | .oo2 1kv cap paralell to each
II( 250vdc ea.| | | | diode for anti RF buzz.
II( 8hy | | | |
II( 110ma | | | | +----)(----+
  | | 1n4007 _|_+ | | o----| |-----o
  +-----)(--------+ A | | +----->|---+
  | + 360uf | 1K 10w | | | +
  +---------------)---/\/\/\-+ | |
  | | _|_/ | |
  | o--------)------+ / A | | <--- 100v 10w zener NTE 5220A
  | / \ | | | | | stud type, mtd on chassie
  +--o/+ -\o----+ | ### | |
      \ / | | |
        \ / 1kv bridge | | |
         o & < 50 | |
         | .002ufs > ohm | |
         | <10 W | |
         | 115vac .2a | |6.3|
         +uuuuuuuuuuuuuuu+ +uuu+
         ============================== __
                  +mmmmmmmmmmm+-------------------/ |=
                  | on off ( |
                  +-------------------o/ o--------\_l= 117vac

--
Randy KA1UNW              If you get a shock while
                         servicing  your  equipment,         "Works for me!"
randy@192.153.4.200             DON'T  JUMP!                     -Pete Keyes
                     You might break an expensive tube!


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