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Re: Topband: 4 sq receive and high power

To: "'Hardy Landskov'" <n7rt@cox.net>, "'Ignacy Misztal'" <no9e@arrl.net>, <topband@contesting.com>
Subject: Re: Topband: 4 sq receive and high power
From: "W0UCE" <w0uce@nc.rr.com>
Date: Wed, 4 Jan 2012 21:26:24 -0500
List-post: <topband@contesting.com">mailto:topband@contesting.com>
My Hi-Z Three Element Array North Antenna is not more than 40 feet from
where my Inverted L Horizontal runs - the INVL Vertical is maybe 60 feet 
away.  I have run 1500w an not a problem at all. 

I had a DXE 4 Square at my for QTH and it had to be 700 feet away from my
closest TX Antenna - The Hi-Z is a great RX antenna system. 



-----Original Message-----
From: topband-bounces@contesting.com [mailto:topband-bounces@contesting.com]
On Behalf Of Hardy Landskov
Sent: Wednesday, January 04, 2012 9:14 PM
To: Ignacy Misztal; topband@contesting.com
Subject: Re: Topband: 4 sq receive and high power

Ignacy,
I have a K7TJR 4 square. In fact I was one of the beta testers way back and 
I have measured +15 dBm using an HP 435A power meter on the 4 square when 
transmitting 1500 watts on my Delta Loop which is 160 feet away. The receive

patterns are very distorted according to EZNEC when I put all the towers and

antennas in the file BUT it still works great and I have not had any rx amp 
failures. I was surprised but the Hi-Z amps are very bullet proof.
73 & HNY Hardy N7RT


----- Original Message ----- 
From: "Ignacy Misztal" <no9e@arrl.net>
To: <topband@contesting.com>
Sent: Wednesday, January 04, 2012 6:47 PM
Subject: Topband: 4 sq receive and high power


>I was planning to buy a 4 sq receive system for the upcoming CQ160 contest.
> One question is about handling of high power when the 4sq cannot be put 
> far
> away from the tx antenna. HI-Z claims that their system is immune to high
> power. DX Engineering claims the opposite and requires a sequencer. The
> sequencer adds complexity and cost.
>
> Did anyone experience a damaged amp in those systems? Would clamping the
> input of a vertical with 2 back to back diodes be acceptable?
>
> On a different note, the Hi-Z site states new legal problems and no sales.
> There 4 sq was about $770 with new amps. However, DX Enginnering has an
> "electrical only" option to HI-Z for $799 that appears equivalent to Hi-Z.
> However it is sold out. So neither is available. Not sure there is another
> viable option.
>
> Ignacy, NO9E
> _______________________________________________
> UR RST IS ... ... ..9 QSB QSB - hw? BK 

_______________________________________________
UR RST IS ... ... ..9 QSB QSB - hw? BK

_______________________________________________
UR RST IS ... ... ..9 QSB QSB - hw? BK

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