|[AMRadio] Smoothing Choke|
w5jo at brightok.net
Wed May 3 17:33:52 EDT 2006
Rick pick up and old ARRL handbook. I have a 56 year version and it has
charts that will help you determine the percent of ripple with various
combinations of L and C.
If you use 4 uf. and 5 H with choke input, it says the ripple percent will
approximate 4%. Usually 5% is where most people go since it takes such
large values to exceed that.
> I am finally building the power supply for my ART-13 transmitter and would
> like your opinion on a thing or two. Thanks to Ronnie Hull, I have a 5 -
> 25 henry swinging choke for the HV supply. I also have, thanks to an old
> TX-1, a 400 ma smoothing choke, 5.5 henry @ 400 ma. I wanted to use
> something a little larger, maybe 10 or 12 henry. I'm using 866 or maybe
> 3B28 rectifiers and 4 mfd and 8 mfd filters. Do you think the 5.5 henry
> choke will be sufficient?
> I also need another 5 - 25 swinging choke in the 250 ma range for the 400
> volt supply. It too will use another 5.5 henry choke if it is determined
> that is sufficient.
> Any and all advice, opinions, criticism or comments are welcome.
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