DC Filter Choke on low voltage power supplies

Posted by Edward R Cole on Feb 05, 2012; 5:54pm
URL: http://elecraft.85.s1.nabble.com/DC-Filter-Choke-on-low-voltage-power-supplies-tp7256286.html

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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BP40IQ   500 KHz - 10-GHz   www.kl7uw.com
EME: 50-1.1kw?, 144-1.4kw, 432-QRT, 1296-?, 3400-?
DUBUS Magazine USA Rep [hidden email]
"Kits made by KL7UW" http://www.kl7uw.com/kits.htm
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