[ARC5] BC-454-B Power

[Rich Post]

A quick view of the circuit will show this to be half wave supply. Negative
is chassis grounded same as in dynamotor, thus 3 connections same as a
dynamotor.  No current limiter and no R-C filter.  The choke and the small
filter cap already in the Command set eliminate the need for further
filtering.  I was asked the size of the uF for the caps.  I used 330 uF but
that value is not critical. The typical computer supply has 220 uF to 470
uF.  If mixing cap values, suggest using the larger uF values in the first
stage or two.  Try the circuit with a incandescent C-7 bulb if you are
unsure of the concept or results.

73 de Rich KB8TAD

On Mon, Jul 19, 2021 at 7:43 PM Hubert Miller <Kargo_cult at msn.com> wrote:

> What is the actual heaters draw at 24 volt?
> I have some very nice 24 volt either 1.5 or 2 amp transformers I scrounged
> years
> ago, thinking of just such an application. I should dig some of those out
> in the next
> weeks.
> With the quadrupler, what input current limit resistor are you using? Also
> are the
> four lytics in parallel, or are you using a R-C filter ripple filter?
> -Hue Miller
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