Extend Range

[Rich]

Where can I add a wire to extend the range of a Linier D24 A transmitter?

 

[moe]

Where can I add a wire to extend the range of a Linier D24 A transmitter?

to the antenna

 

[moe]

Mine doesn't have a short wire coming out of it.
At what component Resister or cap would it be.

is there an f connector on that unit?

 

[moe]

http://www.linearcorp.com/product_security.asp?product=SNT00189

 

[Rich]

This unit is that old and no fittings

is there an f connector on that unit?

 

[Crash Gordon]

The length of the antenna has to be the correct length for the wavelength of
the transmitter...I agree...if he can find the rigid whip antenna for the
Linear transmitter that would be the way to go. And even still..the range
gain may be minimal.




| Rich,
|
| Simply adding wire to an antenna doesn't necessarily improve the
performance
| of the transmitter, most of the time it will take the antenna circuit out
of
| resonance and degrade performance... Contact Linear's tech support before
| making any changes........... Good Luck, Russ
|
| | > Where can I add a wire to extend the range of a Linier D24 A
transmitter?
| >
| >
|
|
|

 

[Rich]

I noticed a cut jumper in mine. But cant find any reason for it The web page
shows no jumper to cut for any reason of setting a delay.

 

[alarman]

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

 

[Rich]

OK whare in the little transitter do you place it?
Where on the circuit bord dos it go?

 

[Rich]

What would happen if I add a longer wire to the receiver?

 

[Rich]

I could run a piece of coax 20 ft to the edge of the room shorting up the
transmitting distance.

 

[alarman]

What would happen if I add a longer wire to the receiver?

The antenna has to be a specific, exact length which is inversely
proportional to the frequency of the transmitter. You may use half or
quarter-wave antennas though.
js

 

[petem]

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

 

[petem]

if you don't have the matching coax for the line you will have a bad
signal..

if the transmitter was balanced to transmit on a 300 ohms line and you put a
75 or 50 ohms line you will in fact lessen the overall signal

 

[Crash Gordon]

AND if you ran that out a few more feet...you could just run a wire to the
door/window.


| 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" <[email protected]> a écrit dans le message de
| news: [email protected]...
| > What would happen if I add a longer wire to the receiver?
| >
| >
| >
| >
| > | >>
| >> | >> > 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
| >>
| >>
| >
| >
|
|

 

[Crash Gordon]

or slap a 500 watt linear amplifier and a nice beam antenna on that baby and
yer all set.


|I also seem to remember that you could get a little more range by using
| 12 VDC instead of the 9VDC. Maybe some old timer here can confirm that.
|
| Bobb D
|
| Rich wrote:
|
| >Where can I add a wire to extend the range of a Linier D24 A transmitter?
| >
| >
| >
| >

 

[alarman]

"Mark Leuck" wrote

You'd have a receiver antenna with a long wire attached to it

js

 

[Mark Leuck]

What would happen if I add a longer wire to the receiver?

You'd have a receiver antenna with a long wire attached to it

 

[Mark Leuck]

AND if you ran that out a few more feet...you could just run a wire to the
door/window.

Lol! If you could get the panel to recognize a hardwire sensor connected to
an RF antenna tell DSC please

 

[Crash Gordon]

You have to use a Belgian Balun Babbelator Adapter Device (BBBAD) to get it
to work.





|
| | > AND if you ran that out a few more feet...you could just run a wire to
the
| > door/window.
|
| Lol! If you could get the panel to recognize a hardwire sensor connected
to
| an RF antenna tell DSC please
|
|
|