Hej James
>        I have this programmer that generates 11.7V for Vpp instead of 13V.
>        The cause is a series resistor in what I suspect is the wrong place;
>
>                 100ohm
>        13V O---/\/\/\/---+---O  To Chip
>                          |
>                          >
>                          < 1k pulldown
>                          >
>                          |
>                         ---
>                          -
>
>        I think the 1k pulldown should be on the left of the current limit
>        resistor .

I think you are perfectly right

/Morgan

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