UHF + UHF Antenna Diplexer

[Rodney Josey]

If I've posted to the wrong NG for this then please advise...

Does anyone know if there is such a thing as a 'diplexer' for combining two UHF antenna's each
pointing in different directions into a single cable prior to being input into an antenna amplifier
?

I have need of 2 x UHF antennas - main one facing north for 4 free-to-air channels & a secondary one
facing to the south for a separate single free-to-air channel. Now I can get a 'diplexer' for
combining a VHF antenna plus a UHF antenna into a single cable which on taking one apart shows that
the VHF side stripline resistive load is different than that used on the UHF side - so NO GO for
using such a 'diplexer' when I need to combine 2 x UHF cables together into the one cable feeding
into the input of an external aerial amplifier.

Any ideas on what I could do to get this ?

Oz-Rod

 

[James]

"Rodney Josey" <rjosDIESPAM@dodo.com.au> wrote in message
news:1106041143.a2135aa1956e1437d8fd0a467bfc0d8f@teranews...

If I've posted to the wrong NG for this then please advise...

Does anyone know if there is such a thing as a 'diplexer' for combining
two UHF antenna's each
pointing in different directions into a single cable prior to being input
into an antenna amplifier
?

I have need of 2 x UHF antennas - main one facing north for 4 free-to-air
channels & a secondary one
facing to the south for a separate single free-to-air channel. Now I can
get a 'diplexer' for
combining a VHF antenna plus a UHF antenna into a single cable which on
taking one apart shows that
the VHF side stripline resistive load is different than that used on the
UHF side - so NO GO for
using such a 'diplexer' when I need to combine 2 x UHF cables together
into the one cable feeding
into the input of an external aerial amplifier.

Any ideas on what I could do to get this ?

Oz-Rod

Well since you are in a location where you are within the range of two
transmitters would it be fair to say they are different bands? one band 4,
the other band 5? If this is the case you can use a triplexer (VHF, UHF band
4, and UHF band 5 inputs). Triplexers are about 4 times the price of
Diplexers, probably because they are not as commonly used. Fraccaro are
probably the most common ones I've seen / used. Ask any decent antenna
installer and they should know what you are talking about...if they dont
they should be able to find one for you anyway

If both within the same band you may be able to get away with a backwards
splitter....however if the signals are strong enough you might get some
interesting ghosting problems, and need to provide some fancy filtering.

How does your next door neighbour do it?

James

 

[dmm]

On Mon, 17 Jan 2005 16:15:06 +1000, Rodney Josey <rjosDIESPAM@dodo.com.au> wrote:

If I've posted to the wrong NG for this then please advise...

Does anyone know if there is such a thing as a 'diplexer' for combining two UHF antenna's each
pointing in different directions into a single cable prior to being input into an antenna amplifier
?

I have need of 2 x UHF antennas - main one facing north for 4 free-to-air channels & a secondary one
facing to the south for a separate single free-to-air channel. Now I can get a 'diplexer' for
combining a VHF antenna plus a UHF antenna into a single cable which on taking one apart shows that
the VHF side stripline resistive load is different than that used on the UHF side - so NO GO for
using such a 'diplexer' when I need to combine 2 x UHF cables together into the one cable feeding
into the input of an external aerial amplifier.

Any ideas on what I could do to get this ?

Oz-Rod

At a pinch you could use a 2 way UHF splitter that is reversed, however you will get a 3db loss in
signal strength from the "input" ports.

Contact Mr. Antenna, or your local Hills Industries outlet to find a proper UHF/UHF diplexer
for your situation. I had a quick look through the Hills Industries website, but failed to find one
suitable.

 

[Alan Rutlidge]

"Rodney Josey" <rjosDIESPAM@dodo.com.au> wrote in message
news:1106041143.a2135aa1956e1437d8fd0a467bfc0d8f@teranews...

If I've posted to the wrong NG for this then please advise...

Does anyone know if there is such a thing as a 'diplexer' for combining
two UHF antenna's each
pointing in different directions into a single cable prior to being input
into an antenna amplifier
?

I have need of 2 x UHF antennas - main one facing north for 4 free-to-air
channels & a secondary one
facing to the south for a separate single free-to-air channel. Now I can
get a 'diplexer' for
combining a VHF antenna plus a UHF antenna into a single cable which on
taking one apart shows that
the VHF side stripline resistive load is different than that used on the
UHF side - so NO GO for
using such a 'diplexer' when I need to combine 2 x UHF cables together
into the one cable feeding
into the input of an external aerial amplifier.

Any ideas on what I could do to get this ?

Oz-Rod

Rod,

It would help if you would post what UHF channels you want to receive on
both the north facing UHF antenna and south facing UHF antenna. This will
determine if a simple splitter wired in reverse will do the job (at the
expense of about 3 - 4dB loss or if you would be better off with a UHF band
4 / UHF band 5 diplexer (typically 1 - 1.5dB loss) or something a bit more
complex as far as diplexers / triplexers go.

Cheers,
Alan

 

[Gary]

Try this mob, lots of splitters and diplexers:
http://www.matchmaster.com.au/Catalogue.htm

Gary

"Rodney Josey" <rjosDIESPAM@dodo.com.au> wrote in message
news:1106041143.a2135aa1956e1437d8fd0a467bfc0d8f@teranews...

If I've posted to the wrong NG for this then please advise...

Does anyone know if there is such a thing as a 'diplexer' for combining
two UHF antenna's each
pointing in different directions into a single cable prior to being input
into an antenna amplifier
?

I have need of 2 x UHF antennas - main one facing north for 4 free-to-air
channels & a secondary one
facing to the south for a separate single free-to-air channel. Now I can
get a 'diplexer' for
combining a VHF antenna plus a UHF antenna into a single cable which on
taking one apart shows that
the VHF side stripline resistive load is different than that used on the
UHF side - so NO GO for
using such a 'diplexer' when I need to combine 2 x UHF cables together
into the one cable feeding
into the input of an external aerial amplifier.

Any ideas on what I could do to get this ?

Oz-Rod

 

[Chewy]

I had the same sort of problem north of Brisbane, I wanted to get the city
channels and also the ones from the sunshine coast.
So I got a 4/5 diplexer from "Hills"
Give them a try they are on the net at www.hillsantenna.com.au
Chewy

"Rodney Josey" <rjosDIESPAM@dodo.com.au> wrote in message
news:1106041143.a2135aa1956e1437d8fd0a467bfc0d8f@teranews...

If I've posted to the wrong NG for this then please advise...

Does anyone know if there is such a thing as a 'diplexer' for combining
two UHF antenna's each
pointing in different directions into a single cable prior to being input
into an antenna amplifier
?

I have need of 2 x UHF antennas - main one facing north for 4 free-to-air
channels & a secondary one
facing to the south for a separate single free-to-air channel. Now I can
get a 'diplexer' for
combining a VHF antenna plus a UHF antenna into a single cable which on
taking one apart shows that
the VHF side stripline resistive load is different than that used on the
UHF side - so NO GO for
using such a 'diplexer' when I need to combine 2 x UHF cables together
into the one cable feeding
into the input of an external aerial amplifier.

Any ideas on what I could do to get this ?

Oz-Rod