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Hy-Gain TH-11DX beam : opinions summary

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Subject: Hy-Gain TH-11DX beam : opinions summary
From: (Morel Grunberg)
Date: Thu, 16 Jan 1997 14:36:50 +0200
  Two weeks ago I sent a request on few relevant reflectors asking for
opinions on Hy-Gain TH-11DX beam. Till now I received 84 answers from
United States
( 74 ), Europe ( 4 ) Asia ( 4 ) and Africa (2).
   I was quite surprised about the very favorable opinions from the
people who taked the time to answer. Actually, 82 were very satisfied
with the antenna and
warmly recommended to buy one. 
   This is a brief summary of the answers:

   This beam was described like a real winner and a very good and
effective solution for those who need a 5-bands beam with reasonable
gain, F/B and
good SWR. Here are the opinions:
* 72 declared their satisfaction on general radiation performance and
  results while only four are not so happy with the front to back ratio.

* 55 were very satisfied by the good SWR over the 5 bands and only four
  reported SWR problems as result of bad assembly work, improper
  and insufficient tower height.

* 60 declared their satisfaction over the ruggedness and mechanical
construction quality.

* 19 favorably compare the TH-11DX electrical, radiation and mechanical 
  performance to previous owned antennas from other manufacturers with
  similar or better figures claimed in the technical specifications.

* 12 were delighted to see the new powerful balun and hi-power antenna
  capability. 5 of them beleive that the general lower noise and statics
is due to
  direct grounding of the balun and to the DC coil connected to the

* 68 were satisfied with the antenna but experienced difficulties in the
  assembly process ( with understanding that such large and complicated
  antenna needs extensive assembly and installation works ).

 Low points:

  It was interesting to see that almost all the criticism was
concentrated on 
the assembly concept and instruction manual.

* 56 would clearly prefer colour, numbering or any other markings for
  and faster identification of the large number of components.

* 48 were quite exhausted trying to ensure that the elements are
installed on
  the boom perfectly parallel and they are feeling that some kind of
  of the element to boom brackets and of the boom, will greatly reduce
  time and the efforts to messure the inter element  spacing and
  alignement and paralleling procedure. 20 of them do not understand how
  antenna of this class doesn't have such facility.

* 36 would prefer an improved graphic presentation and assembly manual
  23 clearly stated that simplified drawings of the components,
  check-list and assembly steps check-list, will greatly improve the
  enginering. 14 would prefere some simple drawings on installation tips
  issues. Also, 10 people are feeling that recommendations for use of
  materials should be more specific ( like the RTV and protective paints
) while
  8 expressed their prefference for an optional kit for coastal
installations with
  improved hardware quality.

* 9 peoples feel they want stronger and heavier pigtail wires.

* 5 are willing to see the antenna radiation lobes for the installation
  recommendations from the manual.


  Morel, 4X1AD          

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