The spark plug arrester has the disadvantage of rather blunt points. Much
better, as someone mentioned, is a pair of copper (prefereably) or brass
plates with facing sharp points, gapped about l/32" (a little less than l
mm.) The suggested 90 degree angle is fine. This will drain a static
charge and carry quite a bit of current; a resistor across the line will
drain the static, but if there's enough charge to pruduce appreciable
current the resistor won't last long. - - The heavy knife switch to
ground along with actual disconnecting the lead-in's from the equipment is
obviously the best protection. K3TX
----- Original Message -----
From: "Bob McGraw - K4TAX" <RMcGraw@Blomand.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Monday, April 14, 2008 10:55 AM
Subject: Re: [TenTec] Ten Tec 238A settings?
> Yes, but with a knife switch one can't operate and be protected at the
> same
> time. With the spark plug arrestor operation continues with protection.
> The knife switch is best when one is away from the station. That presumes
> one does not forget to close it when securing the station. Also, the
> knife
> switch should be located outside of the structure for added safety.
>
> 73
> Bob, K4TAX
>
>
> ----- Original Message -----
> From: "Lyle Dunlap" <qskqrq@grics.net>
> To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
> Sent: Monday, April 14, 2008 7:15 AM
> Subject: Re: [TenTec] Ten Tec 238A settings?
>
>
>> One can use all sorts of spark plugs & things to drain off those little
>> sparkies mother nature puts out, however its hard to beat a DPDT heavy
>> knife
>> switch.
>> For over 25 years I had a 3 wire Rhombic up 375 ft on a leg and with 4500
>> feet of wire basically in the form of a capacitor you can have your own
>> fireworks display. Go with a knife switch.
>>
>> Lyle W9FCX
>>
>> _______________________________________________
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>> TenTec@contesting.com
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>>
>
>
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