[TowerTalk] prop pitch direction indicators

[Mark Robinson]

I have just installed the OR2800 on my tower. I used the shielded control 
cable that the wireman sells. This wire has a heavy awg pair of wires 
(black and white) for the DC motor supply. It also has a shielded red, blue 
and drain wire inside a foil wrapping.

I have grounded one of the pulse switch leads (blue) as well as the drain 
wire inside the shielded pair to the top of the tower inside the M2 
connection diecast box and also at the base of the tower. These wires are 
also grounded at the SPG box. I have used a 19V MOV and 250V 0.1uF capacitor 
at the base of the tower and at the SPG box between the non-grounded pulse 
switch lead (red) and ground.  I hope that this will protect the reed switch 
contacts.

Mark N1UK


----- Original Message ----- 
From: "Dan Hearn" <n5ardxcc at gmail.com>
To: <TowerTalk at contesting.com>
Sent: Friday, 12 November, 2010 12:07 PM
Subject: [TowerTalk] prop pitch direction indicators


>I have been using the M Square OR2800 for 12 years. Twice, nearby 
>lightening
> strikes have induced enough energy to weld the reed switch contacts.
> Otherwise this is a great rotator in my opinion. A recent suggestion is to
> use 2 conductor shielded for the switch leads. Unfortunately I do not have
> shielded leads but will change them out soon.
>
> Dan, N5AR
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