[Hallicrafters] Re: 40M dipole on 80M

Jim Brannigan jbrannig at optonline.net
Thu Oct 2 12:01:35 EDT 2008


That type of antenna is generally called a "Marconi"
Try it that way or just feed the center of the coax for "random wire" type antenna.
80M antennas are about getting as much wire in the air as possible. (short of using a high resonant dipole)

Jim



  How about if you short the coax, apply a good ground at the tuner and use the antenna and feedline as a longwire antenna?

  arnie - W1GCI

  -----Original Message-----
  From: DALE PARFITT [mailto:parinc1 at verizon.net]
  Sent: Thursday, October 2, 2008 09:07 AM
  To: hallicrafters at mailman.qth.net
  Subject: [Hallicrafters] Re: 40M dipole on 80M

  > I have a 40 m dipole horizontal antenna and would like to try > transmitting (HT-44) on 80 m. What should I expect? I have a Ten-Tec > 229 antenna tuner and may be able to match - suggestions (helpful) > would be appreciated. Thanks. > 73, Skip W7WGM > Hi Skip, I did some fast modelling. I assumed a 40M dipole fed with 100' of RG-213. 100W in yields 2W out. If you're feeding with ladder line, it's a different deal of course. The feed Z is 16 -J1009 for a whopping VSWR of 1300:1 Dale 
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