[K3PZN-List] 40m Wire

Tue Sep 19 17:00:37 EDT 2017

Ben,
Ok I'll try that. My tower is only 20 feet so I doubt it would be at a 45 degree angle. I'm not the person you want doing trigonometry but if someone else knows how to figure out what angle that would give then let me know! 
Kyle 

> On Sep 18, 2017, at 10:31 PM, Benjamin Horton <k3fpe at verizon.net> wrote:
> 
> The 40 Meter Inverted "Vee" is very similar to yours and you will be very pleased with the results.  I have an Inverted Vee with the apex at about 25 ft. broadband east-west and a very nice northwest southeast major lobe due to ground reflection.  Can't say enough good things about Inverted Vee type antennas for HF.  Curt has it right....follow his lead on this.  You won't go wrong.  John Hart and I have been using these type antennas for a lot of years with great success.  One of the spin-offs is that this type of antenna loads well because it uses 50 Ohm impedence, not 72 Ohm Flat Top (Dipole).  The normal loading will be in the 1:5:1 and lower.  Just keep the legs at 45 Degrees or less and you will have a drop dead great performance antenna.  Regards, Joe  K3FPE 
> 
>    On Sunday, September 17, 2017 8:27 PM, Mark Rosenthal <marksro at comcast.net> wrote:
> 
> 
> Kyle-
> Curt is correct.  If this is meant to be a resonant, mono band antenna, it should be trimmed to have SWR as close to 1:1 as possible.  That will put the power into the antenna, and not wasted as heat in the tuner.  
> 
> At 15 feet elevation on 40M, most of the energy will be going pretty straight up.  It will be good as an NVIS antenna- don’t expect to get a lot of Dx.  
> 
> Did you consider a “fan dipole” with legs cut for both 40M and 20M.  (If long enough for 40, it’s long enough for 20!).  20M band, when open, gives much better Dx.  And at 15 feet, a better take off angle for better distance propagation.  Just an idea.
> 
> Mark
> W3MSR
> 
> 
>> On Sep 17, 2017, at 6:54 PM, Curt Milton via K3PZN-List <k3pzn-list at mailman.qth.net> wrote:
>> 
>> Kyle
>> don't worry about orientation -- as long as it is low to the ground (less than 60 feet !) -- it will not be directional.  just see what you can do at this height.  
>> 
>> 3:1 SWR?  I presume this is before using your tuner?  or did you adjust the antenna length to get 1.5:1 ??  if your antenna is still 3:1 SWR - tell us what it is at each end of the band -- and this will tell us if the antenna is too short or two long.  
>> 
>> if SWR gets lower as you go up in frequency -- the antenna is too short.
>> if SWR gets higher as you go up in frequency -- the antenna is too long.  if this is the case - you can shorten it by twisting the wire onto itself at each end -- no need to cut or solder.  since you said 33 feet on each end -- my guess is your wire is a bit too long -- try to shorten each end by 6 inches.  it should improve.  
>> 
>> be patient until you get the SWR under 2:1 .... something like 1.5:1 is much better.  also, if your ground half of the antenna (that is, the half connected to outside of the coax) is not connected - this could also give a 3:1 SWR.  
>> 
>> Curt
>> 
>> 
>>     On Sunday, September 17, 2017 6:19 PM, Kyle Thornton <kyle.3599 at outlook.com> wrote:
>> 
>> 
>> Hi all,
>> With the help of Mike and Curt I now have a 40m dipole up at about 15ft stretched across the yard from a tree to a tripod. Each leg is 33ft long. It's positioned currently at about NW to SE because my yard isn't wide enough to put it up east west and still be able to guy the tripod with out going into the neighbors yard. I'm going to try this configuration out tonight when the band gets going and then will adjust from there. It has an SWR of 3:1 and I was able to get it tuned to 1-1.5:1. I'm happy with the way it's set up. Takes about 5-10 minutes total to completely set up and take down. 
>> Kyle 
>> KC3FMP 
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> ______________________________________________________________
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