[Coco] RE: using PC power supply

[x0remery at dsbmail.itg.ti.com]

>> PS: The solution to the 8v power problem (when using a PC power supply) is
>> to bypass the cap. Either jumper across it with a wire (as noted in the
>> article) or go under the RF shield and short the capacitor's leads with solder.
>
>
>    I thought of shorting the capacitor but that could cause loss of some
> of the noise immunity the circuit was designed for.  I was also having
> some reliability problems when the PC power supply provided the 24 volts.
> In the end, it was less trouble for me to use the original supply transformer.
>

Okay, but the noise it's intended to filter is due to the AC voltage going
through it.
With the PC supply, it's pre-filtered so the cap is no longer needed. I'd venture
that the voltage coming from  the PC's 12V rail is cleaner than the post-cap
"filtered" voltage originally fed to the 8v regulator. My RF output is clean.

Bob
(theother_bob at yahoo)