8 replies to this topic

[alanh]

For more detail read Antenna Design Basics + Amplification

This list is selected on the basis of the channels covered only and quotes the appropriate website’s antenna gain.

The higher the number of dB the larger the antenna, the more sensitive and more directional it is. It is also more expensive. The advantage of getting gain from the antenna rather than an amplifier, is that the antenna becomes more focussed thus rejecting delayed signals and interference sources. Amplifiers can become overloaded which antennas cannot. Thus amplifiers can make reception worse.

If the antenna signal is too strong at the receiver, a low cost attenuator can be used. The advantage of this method is that any interference picked up by the cabling is also reduced.

Yagi - Band 4+ Channels 27-49
Horizontally polarised local reception and medium distance
Vertically polarised diffuse reception (either long distance or blocked by terrain

Matchmaster catalog
02MM-DR18B Channels 28 – 50 12 – 14 dB

Hills Antennas
SF91 B4 PLUS Band 4+ (Ch28-50) 14 - 18 dB
TMX20 Band 4+ (Ch28-50) 8.5 - 15 dB
TCX20 B4+ Band 4+ (Ch28-50) 8.5 - 15 dB
TMX14 Band 4+ (Ch28-50) 8 - 13 dB

National Antenna Systems page 6
ANTSXU28-50/19 Band 4+ (ch 28-36) ≤11 dB

Laceys TV - Fracarro
Narrow band Yagis
10/3539/R Channels 36 – 41 11 dB
10/4046/R Channels 41 – 48 11 dB

WISI

Clipsal


Phased Array - Band 4 Channels 28-49
Vertically polarised local reception and medium distance)
Horizontally polarised diffuse reception (either long distance or blocked by terrain)

Note Band 4+ only are not available.

Laceys TV - Fracarro
Fracarro PU16H Band 4-5 15-20 dB for horizontally polarised signals
Fracarro PU8H Band 4-5 12-16 dB for horizontally polarised signals
Fracarro PU8V Band 4-5 12-16 dB for vertically polarised signals
Fracarro PU4 Band 4-5 9 – 12 dB Horizontally polarised signals
Fracarro PU4 & PVP Band 4-5 9 – 12 dB Vertically polarised signals


For Horizontal and Vertical polarisation mounting
Super Hunter Band 4-5 11.5 – 15 dB
Mini Hunter CKD Band 4-5 7.6 – 11.1 dB

WISI
For Horizontal and Vertical polarisation mounting
EE06 Band 4-5 ≤13.5 dB
Matchmaster
02MM-EE06 Band 4-5 ≤13.5 dB
02-ER08 Band 4-5 ≤11 dB
02-ER04 Band 4-5 ≤9 dB

National Antenna Systems  page 6
ANTEE06 Band 4-5 ≤13.5 dB
ANTFAU-L Band 4-5 9 – 12.5 dB
ANTPL10 Phaselink  Band 4-5 9-11 dB

Jaycar, search for LT3138
Band 4-5 ≤12 dB

Dick Smith Phased Array L3087
Band 4-5 8-13 dB

[url="http://www.clipsal.com/trade/__data/page/81/D32.pdf"]Clipsal
2AUNPA1 Band 4-5 Gain 8 - 11 dB
2ANUPA2 Band 4-5 Gain 13.5 dB

AlanH
Please post any errors or omissions here

Edited by alanh, 17 January 2009 - 09:04 PM.

[digitalj]

AlanH,
Which antenna would you recommend me for Mt. Moombil, I'm in Port Macquarie, my current antenna seems to only have 6 or 7 X's + oval + reflector with 2 bars above, 2 bars below, this antenna had been fine till now, except that last night the signal was showing up on NBN digital as only 20db, a strength of 41%, and BER of up to over 11(1E-4), normally NBN would be 47%, 25db, and 0(1E-4), the others were also weaker than normal according to percentages, but the SNR was still at 25db, and they had signal strength of 45%, there wasn't any sort of problem with the BER on these ones, normally the others would be 25db, 49%. The current antenna is a hills antenna (not sure of model as I wasn't ever told by the technician who installed this antenna at the start of september last year, but obviously I need a bigger antenna than what he used).

[alanh]

digitalj,
I would rather answer this one in the Geographic Viewers' Forum Regional NSW

AlanH

[steveinqld]

alanh, on May 14 2006, 10:53 PM, said:

Yagi - Band 4+ Channels 28-49
Horizontally polarised local reception and medium distance
Vertically polarised diffuse reception (either long distance or blocked by terrain


Hills Antennas
SF91 B4 PLUS Band 4+ (Ch28-50) 14 - 18 dB
TMX20 Band 4+ (Ch28-50) 8.5 - 15 dB
TCX20 B4+ Band 4+ (Ch28-50) 8.5 - 15 dB
TMX14 Band 4+ (Ch28-50) 8 - 13 dB

AlanH
Please post any errors or omissions here

What really is the difference between a Hills TMC20 abd a TMX20, other than one is "TruMatch" and one "TruColour"????

Steve

[alanh]

Steve,
TMX has more elements.

AlanH

[beeblebrox]

steveinqld, on Jan 7 2007, 10:13 PM, said:

What really is the difference between a Hills TMC20 abd a TMX20, other than one is "TruMatch" and one "TruColour"????

Steve

TMX has an F connected PCB Balun
TCX is saddle and screw

[steveinqld]

beeblebrox, on Jan 8 2007, 08:59 PM, said:

TMX has an F connected PCB Balun
TCX is saddle and screw

Thanks, I'll go TMX for  the F connector.

[Jeffry]

Notice you mention Fracarro 10 element, narrow band units but only 2 models. They have quite an extensive range of these covering all differnent parts of B4 & B5.
They also have 20 element, narrow band yagis which give exceptional performance for the price.

In my opinion the Hills SF91B4+ is as good as you will get for analogue + digital UHF in Central Tablelands and Central Western Slopes areas (NSW).

And, Fracarro publish gain and F/B curves for all these (and pretty well every other type they have).

cheers
Jeff

[alanh]

Jeffery,
I have been reading Fracarro catalog from Italy and converting the channel numbers to our system. The European/NZ system uses 8 MHz wide channels where we use 7 MHz.

AlanH