Re: Extend Range

["petem" <petem001@xxxxxxxxx>]

if you use twice the length you have yourself a 1/2 wave antenna..

4 time a full length antenna..

anything between and you have a un tuned antenna witch is usually worst then
no antenna




"Rich" <Never@xxxxxxx> a écrit dans le message de
news: -s6dnWD9LfCSlc7eRVn-tQ@xxxxxxxxxxxxxx
> What would happen if I add a longer wire to the receiver?
>
>
>
>
> "alarman" <alarman2000@xxxxxxxxx> wrote in message
> news:rpD4f.77592$lq6.23052@xxxxxxxxxxxxx
>>
>> "bdolph" <bdolph@xxxxxxxxxxx> wrote in message
>> news:U7D4f.2468$4O1.2194@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>> > Many years ago I used to make a dipole to extend the range of these
>> > transmitters.  I could get them to transmit across a street to another
>> > house.  It must be the correct dimensions and trimmed to the
>> > transmitters frequency.   Somebody as linear may have the dimensions to
>> > build this.  Let us know if you find them.
>>
>> wavelength in meters = 300 / frequency in MHz
>>
>> A 433 MHz transmitter has a wavelength of .6928406 meters, or 27.270206
>> inches. You HAM guys can check my math, but
>> theoretically, you could make a quarter-wave antenna of approx. 6.82
> inches.
>>
>> js
>>
>>
>
>