On Mon, May 31, 2010 at 09:57:59AM -0700, sasas asasas wrote:
> Hi. I have an transmitter at 160m band (500w). i know that when the weather
> is bad, the antenna's wire (inverted L) has a voltage about several kvolts. I
> would like to protect my transmitter. I am thinking to use a 2.5mH R.F choke
> (1A max current) which i will connect between antenna's feedpoint and ground
> system. What do you think about this solution? Some radio amateurs i think
> that they use carbon resistances. Which solution is better? ( i don't like to
> increase the swr by adding choke or resistance). Its better to ground the
> choke or the carbon resistance to my transmitter's ground system or to the
> public electric corporation ground system? thank you
My guess is that your transmitter should be the least of your concerns.
I'd be much more worried about your receiver. A good voltage drain will
not only protect your equipment, but also reduce the noise level in your
receiver that arises from the induced voltage.
You may want to take a look at the following:
http://www.iceradioproducts.com/33.htm
Whether you obtain such a product from the manufacturer or roll your
own, the ICE design is a good one. I've used these their arrestors
for a while now, and have not observed any SWR problems arising from
their use.
Rob
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UR RST IS ... ... ..9 QSB QSB - hw? BK
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