The advantage to the spark plug arrestor over the high value resistor is
that the spark plug offers very high resistance until the arc is ignited
then the effective value of R goes very low. Almost like putting a dead
short on the line. Only for an instant or until the arc is extinguished.
The gap method offers much better protection. High R values resistors stay
the same value until they explode then they go higher.
73
Bob, K4TAX
----- Original Message -----
From: "Denton" <denton@oregontrail.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Sunday, April 13, 2008 10:04 PM
Subject: Re: [TenTec] Ten Tec 238A settings?
> Remember those little ceramic blocks that were used for tv twin lead for
> lightning protection? I took one apart...two high value resistors inside.
> ----- Original Message -----
> From: "Bob McGraw - K4TAX" <RMcGraw@Blomand.net>
> To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
> Sent: Sunday, April 13, 2008 7:50 PM
> Subject: Re: [TenTec] Ten Tec 238A settings?
>
>
>> Didn't have an arrestor on the outside, eh. Folks that put up antennas
>> need
>> to understand the need for lightning protection systems. I've found that
>> most don't........understand. Many take shortcuts and omit critical
>> components and configurations. Lightning can be extremely nasty but it
>> doesn't have to be such.
>>
>> 73
>> Bob, K4TAX
>>
>>
>> ----- Original Message -----
>> From: "Ed" <w3nr@comcast.net>
>> To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
>> Sent: Sunday, April 13, 2008 3:15 PM
>> Subject: Re: [TenTec] Ten Tec 238A settings?
>>
>>
>>> Denton wrote:
>>>> Ahhhhhhh...success! Ran 600ohm feeders all the way to the tuner in the
>>>> shack! Since there is no wiring in that part of the ceiling, I just
>>>> screwed
>>>> some cuphooks on the ceiling and suspended the feeders in them.
>>>> Preliminary
>>>> tuning is nice and smooth.
>>>
>>> I did that once.....after $23,000 worth of fire damage from a direct
>>> lightning strike that followed the open wire feeder into the house.
>>>
>>> Be careful and take precautions. 73
>>>
>>> Ed W3NR
>>> _______________________________________________
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>>> TenTec@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/tentec
>>>
>>
>>
>> _______________________________________________
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>>
>
>
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