[Elecraft] DC Filter Choke on low voltage power supplies

[Edward R. Cole]

Recent discussion of use of a filter choke with a battery powered K3 
prompts my question in another application.  I have a 50vdc 50amp 
switching PS which will power a 1100w sspa.  Output filtering may be 
needed to suppress switching impulses on the 50vdc output.  I have a 
large filter choke that was used in a 3000v PS which is probably at 
least 5-8Hy.  Do I need a bleeder resistor across it for protecting 
circuits when powering off the switching PS?  Or is using the large 
filter choke not a good idea at all.  What size filter chokes would 
be recommended?  The 50v PS is a HP PS intended for telephone industry (51v).


73, Ed - KL7UW, WD2XSH/45
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