[ARC5] R-508/ARC Conversion

[Rich Post]

I needed a power supply for a Navy RBS and decided to build one using
modern surplus junk, a pair of back to back transformers from dead UPS
(putting the second transformer from an APS 350 into the empty battery
compartment of the first UPS, an APS 280.)  I had earlier made a similar
conversion for powering an ARC 5 transmitter at QRP levels but wanted more
voltage.  For the higher voltage, I used a doubler on the output.  It
worked great for the RBS.  Change resistors as needed to get the current at
the voltage wanted.  Here's pics of the circuit board and the simple
schematic.

Rich KB8TAD
[image: The power supply doubler board.JPG]
[image: 'Impoverished Experimenter' Doubler power supply schematic.jpg]


On Sat, Apr 29, 2023 at 12:11 PM <n2lxm at juno.com> wrote:

> Greetings All,
>
>
>         Has anyone converted an R-508/ARC using the article in the June
> 1965 issue of 73 Magazine ?. I would like to get this old girl running so
> I can listen in on out local airport Automated weather transmissions.
>
>
>                                                     Jeff N2LXM
>                                           Amateur Radio Operator
>                                                       American
>                                                         Patriot
>                                      Proud Father of Two US Marines
>
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