signal splitter

[Tri-Pacer]

I have on hand a triplexer with outputs for 2 VORs and one GS with one
antenna input.

I know that there will be signal attenuation with this setup, but what will
be the real world effect? Will the VOR receiver be so desensitized that it
will be next to useless?

Will the ILS performance suffer greatly?

If I remove one of the VOR receivers should I terminate the unused output
with a 50 ohm resistor?

I have a fabric plane and adding antennas is a bit of a challenge.

Thanks

Paul
N1431A

[RST Engineering]

"Tri-Pacer" > wrote in message
...
>I have on hand a triplexer with outputs for 2 VORs and one GS with one
>antenna input.
>
> I know that there will be signal attenuation with this setup, but what
> will be the real world effect? Will the VOR receiver be so desensitized
> that it will be next to useless?

If the antenna fed to the VOR/LOC receiver directly allowed usable signal
out to 100 miles, putting the splitter in the line reduces the usable signal
to 70 miles. i.e. a 30% reduction in range. In practice hardly noticeable.


> Will the ILS performance suffer greatly?

The localizer range is affected identically to the VOR signal as described
above. The range to glide slope will have practically no change.


>
> If I remove one of the VOR receivers should I terminate the unused output
> with a 50 ohm resistor?

It is generally considered a good idea to do so. A quarter-watt 47 ohm
carbon resistor will work quite well and can be soldered directly into a BNC
(m) connector.

Jim

[Tri-Pacer]

I love this group.

Thanks Jim