[Elecraft] Inverted L for 160 meters

[kevinr]

I am hearing quite a difference between my inverted V and my 1/4 wave 
over a ground plane.  For the last few weeks I've been hearing less 
noise on the vertical.  Enough less to pull more ops out of the noise.  
When I try the inverted L I expect there to be a little more noise than 
the vertical, but less than the doublet. Now to test that hypothesis.

    Kevin.  KD5ONS


On 8/25/20 5:04 PM, David Gilbert wrote:
>
> Pretty sure there are some significant pattern differences between ANY 
> horizontal antenna and a vertical one on 160m ...  at least at heights 
> practical for amateur radio purposes.
>
> That's probably why.
>
> Dave  AB7E
>
>
> On 8/25/2020 4:49 PM, Lyn Norstad wrote:
>> Good gracious.  Why does everyone overthink 160m?  OK, maybe just 
>> because it's fun.  I get that.
>>
>> But as to operation, I have one (1) antenna, and it is a 360 foot EDZ 
>> (dipole) cut for 3.5 MHz.  It's great on all bands, 160 - 6m.  No 
>> radials needed.
>>
>> Specifically I worked 47 of the 50 states in one 24 hour period on 
>> 160m (holdouts were AK, HI and NV - all picked up within a day or two).
>>
>> I could 'splain more, if anyone is interested.
>>
>> 73
>> Lyn, W0LEN
>>
>>
>>
>> -----Original Message-----
>> From: elecraft-bounces at mailman.qth.net 
>> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of kevinr
>> Sent: Tuesday, August 25, 2020 6:24 PM
>> To: Elecraft Reflector
>> Subject: [Elecraft] Inverted L for 160 meters
>>
>>   From what I can find, and what I can calculate, five wires, each ~130
>> feet long, could make a nice inverted L for 160 meters.  One leg for the
>> vertical and horizontal portion of the antenna.  Four legs for the
>> counterpoise (ground plane).  There are many broken wire antennas stored
>> in my shed which are fodder for the radials. Do all of the legs for the
>> counterpoise need to be 1/4 wavelength or can I substitute some shorter
>> lengths?  The feedpoint should somewhere above 50 ohms impedance.  As I
>> add more radials that number will reach 50 ohms asymptotically.
>>
>> I can get the vertical part up to 70 or 80 feet above ground with the
>> rest of it horizontal.  Most of the radiation should take place from the
>> vertical part since it is closer to the feed point.  But there should be
>> some effect from the direction of the horizontal portion.  How strongly
>> does the direction of the horizontal portion effect the radiation
>> pattern of the antenna system?  My property allows me to point it from
>> 300 degrees around to 200 degrees so I have plenty of options. Between
>> 200 and 300 degrees there is a road used by loggers, and the folks
>> maintaining the towers at the top of this mountain.  They can break any
>> antenna lower than 80 feet above ground.  Spar poles and cranes clear
>> out any dead limbs across the road.
>>
>> Inquiring minds...
>>
>> Kevin.  KD5ONS
>>
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