[TowerTalk] Spid RAK-1 Rotor Reed Switch?

[Don Moman VE6JY]

He's measuring the resistance of the current limiting resistor (inside the
rotor housing) which is in series with the reed switch.  This is typical of
a lightning strike event that welded the reed switch contacts closed.

On Thu, Jul 18, 2013 at 8:02 PM, Rick Karlquist <richard at karlquist.com>wrote:

> Jerry Gardner wrote:
>
> >> bench yet, I think I need to replace the reed switch. It is showing
> >> about
> >> 780 Ohms and will not show any pulses.
> >>
> >>     TNX es 73,  Fred  KG9X
>
> I can't imagine any failure mechanism that would make a reed
> switch look like 780 ohms all the time.  I suggest you investigate
> other possibilities like a bad cable, etc.  If you told me it
> pulsed, but had a high resistance, I would try pulsing it with
> a high current like 100 mA to see if there was oxide on the contacts,
> etc.
>
> Rick N6RK
>
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