Re: [IRCA] EXPERIENCE WITH LARGE LOOPS

[Walter Salmaniw <canswl@xxxxxxxxx>]

I think Nick nailed it.  I've used loops of "enormous" diameters, and
multiple loops, too (like twice around).  Andy recommended separating these
by about a foot (30 cm).  My largest loop circumference would be close to
150 to 200'.  Again, mostly for convenience with trees located in that
space.  I don't think I gained anything more by making them that large,
even on LW.  I've never overloaded my Perseus SDR, even with that large
circumference, either.  73,...Walt

On Tue, Feb 23, 2016 at 4:42 PM, Steve Ratzlaff <ratzlaffsteve@xxxxxxxxx>
wrote:

> A number of folks on the Yahoo ndblist use the ALA100 preamp with larger
> circumference loops for LF NDB reception, and loops in the 120-150 foot
> circumference work very well, as long as the loop isn't pointed right at a
> strong nearby AMBC station--then overload can be experienced. I've used
> such loops too with the ALA100 preamp with great results at LF.
> Steve
>
>
> On 2/23/2016 5:51 AM, Mark Durenberger Mobile wrote:
>
>> Finally in possession of a Wellbrook ALA-100 (sometimes us old folks move
>> slowly).
>>
>> I'm intrigued by the idea of a large magnetic loop and seeking war
>> stories from anyone who has built these larger-circumference arrays.
>>
>> Wellbrook suggest a 60-foot circumference is about as large as you should
>> go to take full advantage of the amplifier.
>>
>> At our upcoming DesertDXPedition in Utah we plan on chasing signals below
>> 500 kHz.  What I'm curious about is whether such a large loop is necessary
>> to give us a leg-up on long-wave.  Might we do (almost) as well with
>> smaller antennas?
>>
>> This group is extremely responsive and supportive, and I'm looking
>> forward to your thoughts!
>>
>> Cheers!
>>
>> Mark Durenberger
>> With the MN Twins Spring Training, Ft Myers FL
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