Thanks Jim and all who replied. I'll check one of my older Handbooks
and see if I can match up the choke with suitable capacitors to get the
ripple as low as possible.
If anyone has a 5 - 25 swinging choke they'd be interested in dealing I
am in need of another one. I'm also going to need a 10 amp choke for
the low voltage supply.
Thanks to all....
Rick/K5IZ
Jim Wilhite wrote:
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.
73 Jim
W5JO
Hi:
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.
Thanks,
Rick/K5IZ
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