Re: Apple Power Supply Questions

[capknight <cepheusfilms@gmail.com>]

On Apr 12, 7:39 pm, capknight <cepheusfi...@gmail.com> wrote:
> Hello,
>
> I picked up a number of active and dead power supplies recently. A few
> are the AE Vulcan GS supplies, AE IIe Supplies and original OEM Apple
> supplies.
>
> Some were dead but I was able to resurrect them by replacing the
> electrolytic capacitors.
>
> The readings are a bit odd on the Vulcan GS supplies. I've listed them
> below with modified and unmodified numbers (meaning I replaced the
> caps in one and left the other original).
>
> The negative 12 volt leg seems really low on the Vulcan GS supplies as
> well as the re-capped AE IIe supply.
>
> I did not test the Vulcan GS supplies with the 105mb hard drives
> installed. I was able to find re-certified drives that work just fine
> with the Vulcan GS cards.
>
> Testing was done straight from the boards and not through the cables.
>
> One thing I did note on the Vulcan GS supplies is that the gauge of
> the wires from the 120v receptacle to the switch and board are very
> thin in comparison with the other supplies.
>
> Any thoughts?
>
> Thanks!
>
> C
>
> Modified Vulcan GS (caps replaced):
> ================
>
> -4.32
> -10.07
> +12.19
> +5.47
>
> Fan: +12.17
>
> Molex for HD:  (red) +5.46
>                    (yellow) +12.17
>
> Unmodified Vulcan GS:
> ==================
>
> -4.27
> -10.05
> +12.13
> +5.42
>
> Fan: +12.11
>
> Molex for HD:  (red) +5.47
>                    (yellow) +12.08
>
> Modified Applied Engineering IIe Supply (caps replaced):
> ============================================
>
> -4.99
> -11.6
> +12.03
> +5.28
>
> Unmodified Apple IIgs Supply:
> =======================
>
> -4.98
> -12.13
> +11.24
> +5.05

I forgot to note that I did make some slight adjustments to the pot on
the board to see if I could move the voltages around a bit. It helped
on the AE IIe supply.

Thanks,

C