[TowerTalk] 80 m delta loop

[Dick Green WC1M]

The higher you can get the bottom wire off the ground, the better the
antenna will perform. It should be at least 3 meters off the ground,
preferably higher. 73, Dick WC1M 

> -----Original Message-----
> From: Geert Hofman [mailto:Geert_Hofman at Jabil.com] 
> Sent: Monday, October 30, 2006 5:37 AM
> To: towertalk at contesting.com
> Subject: [TowerTalk] 80 m delta loop
> 
> Hi,
> 
>  
> 
> Some weeks ago I posted a question regarding my 80 m delta loop .
> 
> I finally decided to go the "easy way" and cut off about 10 
> meters, to get it to resonance in the 80 m band
> 
> It's now resonant around 3.650 Mhz and by replacing the 
> "tuning bit of wire" I can get it up or down.
> 
>  
> 
> Made this morning my first QSO with K1 land, so I am 
> happy.... ( although I only got 449, whilst I read him with 
> real 559, but am running only 100 Watts)
> 
>  
> 
> Out of curiosity though I modeled the antenna via MMANA but 
> get very strange results...
> 
> I assume there are more knowledgeable people on this group, 
> who can tell me what really to expect.
> 
>  
> 
> I made a small drawing below ...
> 
>  
> 
>  
> 
>                                                 *
> 
>                         21 meter         *     *         21 meter
> 
>                                          *              *
> 
>                                       *                    *
> 
>                                   *                           
>  *° FEEDPOINT
> 
>                                * * * * * * * * * * * * * * * *      
> 
>  
> 
>                                         42 meter
> 
>  
> 
> Apex height is only 10 meter and baseline wire of 42 meter is 
> only 2 meter from the ground.
> 
> Feedpoint is very close to the corner , but was measured for 
> around 3.600 MHz, so pretty much in line with current 
> resonance of 3.650 MHz
> 
>  
> 
> Soil is average to good. 
> 
>  
> 
> Would like to hear what take off angle with max gain I can 
> expect and some idea of the radiation pattern.
> 
>  
> 
>  
> 
> Thanks for helping me out and hopefully we meet somewhere on 
> 80 ( CW or BPSK )
> 
>  
> 
>  
> 
> 73's - ON4IG - OQ5A  
> 
> Gerry
> 
> 
>