[TowerTalk] 80 m delta loop

[Bob Maser]

Delta loop fed ±15' up from the corner.
----- Original Message ----- 
From: "Randy Lake" <rlake at ne.rr.com>
To: <wc1m at msn.com>
Cc: <towertalk at contesting.com>; "'Geert Hofman'" <Geert_Hofman at Jabil.com>
Sent: Monday, October 30, 2006 2:03 PM
Subject: Re: [TowerTalk] 80 m delta loop


So if one was to have the choice of an inv.v at 95' or a delta hung from
the same support which would be the best choice for dx?
73, Randy N1KWF

Dick Green WC1M wrote:
> 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
>>
>>
>>
>>
>
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