[VHFcontesting] [VHF] Log Periodic Antenna Performance?

Sat May 9 08:53:51 PDT 2009

I forgot to add the 5 band unit is 28-50/144/220/440/1.2 GHz, Model 204350
http://www.rfwiz.com/AustinAntenna/AustinAntenna_InfoDat.htm

----- Original Message ----- 
From: "George Sintchak/WA2VNV" <wa2vnv at optonline.net>
To: <AA4ZZ at aol.com>
Cc: "James Duffey" <JamesDuffey at comcast.net>; <les at highnoonfilm.com>; 
<vhf at w6yx.stanford.edu>; <vhfcontesting at contesting.com>
Sent: Saturday, May 09, 2009 11:46 AM
Subject: Re: [VHFcontesting] [VHF] Log Periodic Antenna Performance?

Les - to use a single feedline, you can use a multiband Pentaplexer  x2 (5
bands) at each end of the coax.
see http://www.rfwiz.com/AustinAntenna/AustinAntennaTriplexers.htm
I use the pentaplexer to feed multiple xcvrs to a discone at the top of my
tower mast for verticle polarization for monitoring, repeaters, etc.
You could use this method to feed multi radios to a single coax (1/2 or 7/8
hardline) and then use another splitter at the mast to feed multiple Yagis.

I have NO connection with this company, just a satisfied user. I have RF
swept the ports and indeed verified the insertion loss and out of band
rejection and it meets all the specs. Actually the low freq port on the 5
band unit is good for 50 MHz and below so you can get HF if needed.
Just some more things to plan/consider.

I concur - start small/simple, wait for them to get used to seeing it - then
add more aluminum to get those more distant TV stations. Don't mention you
do ANY transmitting at all.

George, WA2VNV

----- Original Message ----- 
From: "James Duffey" <JamesDuffey at comcast.net>
To: <AA4ZZ at aol.com>
Cc: "James Duffey" <JamesDuffey at comcast.net>; <les at highnoonfilm.com>;
<vhf at w6yx.stanford.edu>; <vhfcontesting at contesting.com>
Sent: Saturday, May 09, 2009 11:22 AM
Subject: Re: [VHFcontesting] [VHF] Log Periodic Antenna Performance?

Yes, this seems like a good combination. A 4 element 2 M Yagi, a 6
element 222 MHz Yagi and a 11 element 432 MHz Yagis will all fit on a
12 ft boom and probably give a lot better performance than a similar
length Log Periodic with the ame n umber of elements. Someone must
make a 144/222/432 triplexer so that they can all be fed with a single
feed line. - Duffey
On May 9, 2009, at 9:09 AM, AA4ZZ at aol.com wrote:

> I've often thought that a set of shorter 144, 222 and 432 yagis on
> one boom
> with higher band in front of the lower would look to the average
> person a
> lot  like a LPA yet have much better perfomance. Perhaps something
> like 5
> elements on  144 and 222 and 10 elements on 432.
>
> 73 Paul AA4ZZ
> **************A Good Credit Score is 700 or Above. See yours in just
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--
KK6MC
James Duffey
Cedar Crest NM

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