[Antennas] portable antenna question

2004年5月07日 14:53:31 -0700

Waht do you mean by "near" salt water? 10" or 10 miles?
Terry Conboy wrote:
> At 08:11 PM 2004年05月05日, Mark Mills wrote:
>>> I have a question about a portable hf antenna. I have a Realistic 
>> Htx-100 (10 meter) transceiver which I want to use on the CW mode at 
>> 5 Watts with a portable battery. I will be using the rig on the beach 
>> here in Florida. I would like to use a simple vertical antenna like a 
>> hamstick which I would have attached to a metal rod stuck into the 
>> sand. Would this antenna get out or would it not work without some 
>> type of radials?. I want something small and very portable because I 
>> will be using it often.
>>> A hamstick on 10m is essentially a piece of fiberglass with a wire 
> running up it. If you're cheap like me, just get a 10' piece of PVC 
> pipe (1/2 or 3/4 inch), jam 1.5 feet in the sand, tape or tie-wrap 8.5 
> feet of #14 wire (insulated house wire is great) along the pipe. 
> Connect this to the center conductor of your 50 ohm feedline and 
> connect two or more 8.5 foot radials (any gauge insulated wire) to the 
> shield of the coax and lay them on the sand. You can cut the 10' pipe 
> in half (or thirds) to make it easier to transport and use a PVC union 
> (no glue on one side) to connect the sections together when operating.
>> A standard stainless steel CB whip will work great, too, if you cut 4 
> or 5 inches off.
>> Near salt water, a vertical will work like gangbusters, IF there are 
> any sunspots and IF anyone else is on 10m!
>> 73, Terry
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