Kurt Steffensen's Gorilla Amp(s)

Mark II

Paul Joppa Parafeed Variation

 
>                                  | (+400V
>                                  |
>                                  )
>                                  )
>                                  ) OPT   
>                                  )   
>                                  )    
>                                  A   
>|-------------------------------- G 2A3  
>|                                 C    
>|     ________________            |
>|    |   105v     |  +CCS         | 145V
>|    )            |               |
>|    ) choke      |               |
>|    ) low  R     |               |
>|    )            |               |
>|    )            |               |
>|    |            |               |
>|____| ca 100V    |               |________
>     |            |               |        |
>     A            A            2500 ohms   |
>in---G driver     C  OC3          |        |
>     C____________|               |       === bypass cap
>                  |               |        |
>            bias resistor         |________|
>                  |               |
>                ground          ground
 And another variation 
                 +250V
                  |
                  |___   __________ 16 Ohm
                      )|(
                      )|(__________  8 Ohm
                      )|(
                      )|(__________  4 Ohm
                      )|(          |
                  ____)|(____ 0    |
                 |           |     |
                 |           |     |
                 |           |     |
                 A           |     |
         --------G  2A3      |     |
        |        C           |     |
        |        |           |     |
        |        |           |     |
        |        |_________________|__ + positive rail from
        |                                 - 200V PSU.
        |                    |
        |         ___________|_________ ground ( 250V PSU
        |        |                         grounded here)
        |        |
        |        )|
        |        )|
        |        )|
        |        )|
        |        )|
        |________|
                 |
                 A
 ~---||----------G
in   820n   |    C
          100k   |
            |    |
            |   LED (or batterie/resistor/bypassed
            |____|      resistor , what everyou like best )
                 |
              - 200V  ( Positive rail connected to point
                       * , at the cathode of 2A3 )
 one more