(2003.10.10)
1st stage 8mA (4mA x2)
xGH8At P-K 120V
xGH8Ap P-K 150V..180V
R0.6K/4mA 2.4V
xGH8Ap bias 2.75V
1st stage total 280V..300V
2nd stage 104mA (52mA x2)
2nd stage total 335V
6B4G P-K 285V
6B4G bias 50V

                       + B+ 280V
                       |
                       P
                  +-G<9GH8At>
                  |    K
                  |    +------Cc--------+
                  |   R0.6K             |
                  +----+       125V     |           +------+
in >--+                |        +       |           |      |  Softone
      |                P        |       |           P      |  RX-40-5   +--> NFB
   VR50K<--+--------G<9GH8Ap>S--+       +--------G<6B4G>   |    5K 6    |
      |    |           K        |       |          F F     +----++++----+--> SP
      |   R470K        |        |      R330K       | |          ||||
      |    |      8mA  |        |       |          | |  B+      ||||
      ~    ~   +--CRD--+        |  +-->VR50K  104mA***  335V >--+|||
               |       |        |  |    |          | |          ||||
               + C-    |        |  ~   R330K       | |          ||||
                       K        |       |          F F     +----++++----+--> SP
NFB >--Rxxx--+------G<9GH8Ap>S--+       +--------G<6B4G>   |            |
             |         P                |           P      |            ~
           VR100       |                |           |      |
             |    +----+                |           +------+
             ~    |   R0.6K             |
                  |    +------Cc--------+
                  |    K
                  +-G<9GH8At>
                       P
                       |
                       + B+ 280V

***
                            <6B4G>
                             F  F
                             |  |
                     +--R33--+--)----< 6B4G Heater
            104mA    |       |  |
+--A<LM317T>I--R270--+       |  |
|       O       10W  |       |  |
|       |            +--R33--)--+----< 6B4G Heater
+--R12--+                    |  |
|                            F  F
~                           <6B4G>


        +--SK--+ MX-280                                  +----> B+ 335V 208mA
        |      |     280V  349V    345V                  |
100V >--+--SW--+--++++--|>|--+--R20--+----+--C<2SD799>E--+--R3.3K--+-------+----> B+ 280V 16mA
                  ||||       |   5W  |   R3K     B             5W  |      R160K 1mA
100V >----FUSE----+|||       |      C100  |      |                C100     +----> SG 125V
                   ||+-------)--+   400V  +------+                350V    R47K
                   |||       |  |    |   R160K  C100               |       +----> Heater Bias 80V
                   |||       |  |    |   R5.1K  400V               |      R82K
                   ||+--|>|--+  +----+----+------+-----------------+--R15--+----> E
                   ||280V      -3.3V                               |   3W
                   ||                                              +----> C- -3.3V
                   ||            5W 5W
          6.3V 5.2A||+--|~ +|--+--R1.0--+----> 6B4G Heater Lch
                   |||         +--R1.0--+
                   |||       C10000   C10000
                   |||         16V      16V
                 0V||+--|~ -|--+--------+----> 6B4G Heater Lch
                   ||
          6.3V 5.2A||+--|~ +|--+--R1.0--+----> 6B4G Heater Rch
                   |||         +--R1.0--+
                   |||       C10000   C10000
                   |||         16V      16V
                 0V||+--|~ -|--+--------+----> 6B4G Heater Rch
                   ||
            6.3V 3A||+--------> 9GH8A Heater
                   |||
                 0V||+----+----+
                   ||    R3.3 R3.0 5W 5W
            5.0V 3A||+----+----+
                   |||
                 0V+++--------> 9GH8A Heater & Heater Bias