Hi Ian, a third requirement for good regulation is a stiff ac power
service. In rural areas this can be a bit of a problem with C filter designs.
Can
also be a problem in older homes with less than robust wiring.
Same issue as using 240vac instead of 120vac for better regulation.
73,
Gerald K5GW
In a message dated 2/14/2012 5:39:26 A.M. Central Standard Time,
gm3sek@ifwtech.co.uk writes:
Rob Atkinson wrote:
>In your long description you said nothing about the filter caps in use.
>Please describe them. Ideally I would want one or more oil caps giving
>around 50 uF with 6 KVWDC
>
Good regulation requires two things: low transformer winding resistances
*and* sufficient capacitance. If the winding resistances are much too
high (which seems to be the case with Steve's transformer) then even
large amounts of capacitance can only have a marginal effect.
This has always been apparent in the old paper charts, and software like
PSU Designer makes it even clearer.
--
73 from Ian GM3SEK
http://www.ifwtech.co.uk/g3sek
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