>From what Ive read elsewhere their target market is often the cave dweller
surrounded by 100+ other units making electronic noise and the poor owner is
trying to hear something on his $59 allband Chinese toy.
Carl
KM1H
----- Original Message -----
From: "W2PM" <w2pm@aol.com>
To: <galicic@comcast.net>
Cc: "Top Band" <topband@contesting.com>
Sent: Wednesday, April 11, 2012 3:24 PM
Subject: Re: Topband: Wellbrook receive loop performance
> BCB work would be good for the Wellbrook and I suspect that is their
> target market.
>
> Sent from my iPad
>
> On Apr 11, 2012, at 9:14, joe <galicic@comcast.net> wrote:
>
>> I made some signal to noise measurements last night between my short BOG
>> and LOOP. Local (100-300 miles away) cw signals. The Loop, which is
>> still living in my basement, is within 3DB of the BOG. I will move it
>> outside soon and see what happens to SNR. I still need to try it out on
>> some weaker DX stations.
>>
>> The LOOP has also proved to be promising on hearing multiple AM
>> broadcast stations on the same frequency due to its good nulling
>> capability. I could never do this with the BOG or L.
>>
>>
>> On Tue, 2012-04-10 at 11:04 -0400, joe wrote:
>>> I built it in one evening using two pieces of scrap 1x3 lumber for
>>> spreaders. I pounded in four large wire staples to hold the wire to the
>>> spreaders and threaded both loops through them. The five wire and one
>>> wire pickup loop are not separated. I used a variable cap of roughly
>>> 150-200PF to resonate the 5 wire loop. I fed the pickup loop directly
>>> with RG-58 coax. No matching transformer. The loop is roughly 32 inches
>>> square. I tune the cap for maximum noise for the desired frequency.
>>> The loop is tunable from about 1600 - 1850 KHZ.
>>>
>>> I modeled my loop after the following designs for unshielded loops.
>>>
>>> http://www.i1wqrlinkradio.com/antype/ch9/chiave1183.htm
>>>
>>> http://members.verizon.net/~vze24qhw/loop.html
>>>
>>>
>>> On Tue, 2012-04-10 at 08:49 -0400, joe wrote:
>>>> I am experimenting with a small one meter square loop. It is 5 turns
>>>> of
>>>> #14 wire with a one turn pickup loop. Feeding the pickup loop directly
>>>> with 50 ohm coax. Using air variable cap to resonate the 5 turn loop.
>>>> I have it setup in my basement on a tripod with small TV rotator and it
>>>> works amazingly well. I can null stations about 3-4 S units with it
>>>> and
>>>> it is about 4 S units (24 DB) quieter than my inverted L. I also have
>>>> a
>>>> short 140 foot BOG and the loop performs nearly the same with the added
>>>> ability null out noise sources. I plan to move it outside and take
>>>> some
>>>> more measurements. I'm pretty impressed so far. -Joe KB3KJS
>>>>
>>>>
>>>>
>>>>
>>>> On Mon, 2012-04-09 at 17:17 -0700, Jim WA9YSD wrote:
>>>>> How well does this antenna perform in a City environment like mine on
>>>>> top of a 50 foot tower?
>>>>>
>>>>> Stay on course, fight a good fight, and keep the faith. Jim
>>>>> K9TF/WA9YSD
>>>>> _______________________________________________
>>>>> UR RST IS ... ... ..9 QSB QSB - hw? BK
>>>>
>>>>
>>>> _______________________________________________
>>>> UR RST IS ... ... ..9 QSB QSB - hw? BK
>>>
>>>
>>> _______________________________________________
>>> UR RST IS ... ... ..9 QSB QSB - hw? BK
>>
>>
>> _______________________________________________
>> UR RST IS ... ... ..9 QSB QSB - hw? BK
> _______________________________________________
> UR RST IS ... ... ..9 QSB QSB - hw? BK
>
>
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_______________________________________________
UR RST IS ... ... ..9 QSB QSB - hw? BK
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