[TenTec] OT: Question to the group -tuner and dipoles

[Jim Brown]

RIGHT!

The usefulness of very low antennas for short distance work is a MYTH.

Slide 19 in this link shows that an 80M dipole  produces maximum 
radiation at high angles (70 degrees) at 60 ft, and that raising it to 
90 feet loses only about 1 dB at high angles.

http://k9yc.com/VertOrHorizontal-Slides.pdf

I won't question that the very low antenna described might be quieter 
than a high one -- in any given QTH it may be, but it is a LOUSY TX 
antenna for ANY distance or angle.

73, Jim K9YC

On Mon,7/18/2016 1:26 PM, Darrell Bellerive wrote:
> That may work well for receiving, but for transmitting the ground 
> losses at such a low height would be substantial. QRP with 100 watts. :-)
>
> 73, Darrell VE7IU
>
> On 16-07-18 01:08 PM, Stuart Rohre wrote:
>> Working at 1/8 wave above soil, brings as signal to noise gain, in 
>> that "skip static" from Summer thunderstorms is greatly attenuated or 
>> not picked up at all.
>>
>> NVIS brought back 80m to usefulness for Field Days due to the reduced 
>> noise floor when the antenna was 5 to 6 feet off ground with a 
>> reflector at grass top level. (after mowing).
>>
>> -Stuart Rohre
>> K5KVH
>