Hello
you dan do the same with DXE-TFS4-80 box?
thanks
Jorge
CX6VM/CW5W
2016-11-30 0:57 GMT-03:00 Matt <maflukey@gmail.com>:
> The Comtek model ACB-4-A series units could be used to drive a 2 element
> phased array by connecting the 2 verticals separated by a quarter
> wavelength on ports #1 and #4 of the hybrid quadrature unit. Leave ports
> #2 & #3 disconnected but do connect a 50 ohm dummy load to the dump port.
> You will need to feed the antennas with 1/4 wave electrical length 50 ohm
> coax instead of the 75 ohm used in the 4-square configuration - no
> impedance transformation is required because only one antenna will be
> driven from the opposing sides of the hybrid bridge. You may also want to
> call Dx Engineering or Comtek and just confirm this info is still valid
> with the current series units but as far as I know it's essentially the
> same circuit.
>
> Hope this info is helpful. Good luck on you project.
>
> 73
> Matt
> KM5VI
>
>
>
> -----Original Message-----
> From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of
> Marty s
> Sent: Monday, November 28, 2016 1:27 PM
> To: towertalk@contesting.com
> Subject: [TowerTalk] 2 Element phased vertical array using Comtek
> Foursquare Box
>
> Greetings Everyone.... hope CQ WW CW treated you well,
>
> I have everything I need to erect a 40m foursquare on my tiny urban lot in
> MA. It looks like I won't get it properly finished in time for this
> winter, but would like to at least get some gain out of the two verticals I
> have up right now, to get 2 directions of endfire. Can a normal Comtek box
> with no modification be used to handle this, or is it more effective for me
> to just phase the two verticals with a homebrew box relying on 1/4 wave
> 75ohm phasing lines?
>
> Thoughts, opinions, concerns, questions?
> _______________________________________________
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--
73,
Jorge
CX6VM/CW5W
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