[Boatanchors] LK-500ZC Amplifier Help

Mark K3MSB mark.k3msb at gmail.com
Sun May 8 15:06:28 EDT 2022


Hi Rob

No argument there.  What I'm still not sure about is if the components on
the board are as indicated in Figure B-5 on the manual, which is not a
standard  inrush design.

Mark K3MSB

On Sun, May 8, 2022 at 2:19 PM Rob Atkinson <ranchorobbo at gmail.com> wrote:

> The amp will shut down completely if the in-rush resistor opens and
> the relay doesn't short across it.  It doesn't matter if it is wired
> for 120 or 240 v.  That's if the amp is competently designed.  Usually
> the fan is across one half of the h.v. transformer primary or both if
> 240 v. AC fan.  You don't want the filaments on with no fan.  So the
> in-rush is ahead of all that including filament supply so if it blows
> the whole show stops.
>
> 73
> Rob
> K5UJ
>


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