>On Sun, 16 Nov 2003 18:31:03 -0800, R.Measures <r@somis.org> wrote:
>
>>** With a resonant-choke filter, enough bleeder current must flow to
>>keep the output V from soaring during RX.
>
>_________________________________________________________
>
>Even with a non-resonant choke filter, you can get some surprisingly
>high voltage spikes when the load varies suddenly. I once made a ~150
>volt DC supply for test purposes and was easily able to get 300 volt
>spikes when suddenly removing a resistive load.
^^ There must have been a lot of L in the filter cap. What was the
bleeder resistance, Bill?
>Bleeders will help to
>alleviate this condition, as will having a large output C, but careful
>evaluation is needed before putting such a supply into operation.
>
>--
>Bill, W6WRT
>
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