[TowerTalk] How does the DX engineering 4Sq phasing box compare?

[jeremy-ca]

Thanks Tim and others. I may have a chance to pick up a DX Eng of Oregon 
used for less than half of a new Comtek.  That would be less than my time 
spent on building one.
Speaking of building, is there an "approved" circuit floating around in 
print somewhere? Ive been away from this too long and out of touch with 
"progress".

Carl
KM1H


----- Original Message ----- 
From: "Tim Duffy K3LR" <k3lr at k3lr.com>
To: "Mark Robinson" <markrob at mindspring.com>
Cc: <TowerTalk at contesting.com>; <richard at karlquist.com>
Sent: Thursday, July 05, 2007 4:56 PM
Subject: Re: [TowerTalk] How does the DX engineering 4Sq phasing box 
compare?


>I think there is some confusion going on here.
> There are two versions of DX Engineering boxes that I am aware of.
>
> The 1st was a copy of the Comtek box. Built by the former DX Engineering 
> company
> in Oregon (not to be confused with the even older DX Engineering company 
> that
> built RF speech processors for Drake and Collins gear) This Comtek clone 
> can be
> used for TX and RX. I measured the performance of this box (80 meter 
> version)
> and found it to be close to proper phasing, but not as good as the Comtek.
>
> The 2nd (current DX Engineering company in Ohio) 4 square box is RX only. 
> It was
> designed by W8JI and is available direct from DXE. I use one on 160 meters 
> with
> mobile antennas for the vertical elements and it works great.
>
> The Ohio DX Engineering company has said that they may produce a 4 square 
> box (8
> directions) that would TX and RX, but it has not come to market yet as far 
> as I
> know.
>
> 73!
> Tim K3LR
>
>
> Mark Robinson wrote:
>
>> Agreed but I have worked quite a few stations on 80m who were using the
>> Comtek box and they had good directional characteristics from their 
>> arrays.
>> If you have a nice flat location then the Comtek box should work well but 
>> it
>> is not so easy to tweak as the DXE box.
>>
>> Mark N1UK G3ZZM
>>
>> ----- Original Message -----
>> From: "Rick Karlquist" <richard at karlquist.com>
>> To: "jeremy-ca" <km1h at jeremy.mv.com>
>> Cc: <towertalk at contesting.com>
>> Sent: Thursday, 05 July, 2007 3:35 PM
>> Subject: Re: [TowerTalk] How does the DX engineering 4Sq phasing box
>> compare?
>>
>> > IMHO, the DXE is the first box to do it the "right" way.
>> > It is also fairly expensive.  I don't own any of these,
>> > but the DXE is similar to stuff I have homebrewed that
>> > worked well.  It looks like a good implementation.
>> >
>> > Rick N6RK
>> >
>> > jeremy-ca wrote:
>> >> Im considering going to a 4sq for 80M and possibly 160 and wonder how 
>> >> the
>> >> DX
>> >> Engr compares to Comtek and others?
>> >>
>> >> Carl
>> >> KM1H
>> >>
>> >>
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