Hi Bob,
We gotta support the ferrite industry! Seriously, you’re correct. Choose
the cure to match the problem.
On the other hand, efficiency is not an obsession. Saving money just makes
sense. I seldom walk down the road throwing quarters in the ditch. You
can’t just drop an AC motor into a system designed for a DC variable speed
drive. That would involve some significant rewiring and void the warranty.
(For whatever that may be worth!)
On Saturday, February 8, 2020, Rob Atkinson <ranchorobbo@gmail.com> wrote:(
> First, there's nothing wrong with American Standard as far as I know,
> which is a premium brand manufactured in Texas by Ingersol Rand.
>
> Forced air A/C in the home, almost always uses the same air blower
> motor that's used by the furnace. If that's the variable speed
> component, you can solve everything by getting an AC motor. The
> variable DC motors are used by people who obsess over a relatively
> minor improvement in efficiency.
>
> Why do hams mindlessly use ferrite on everything, including lines that
> only have DC on them? What happened to RF chokes and bypass
> capacitors, which when the correct component values and specifications
> are used (value, current handling and voltage rating), will work
> better and cost much less?
>
> 73
> Rob
> K5UJ
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