[CW] OT - Please Excuse - Mag Loops for CW (and other modes)

Fri Mar 13 21:33:21 EDT 2015

Stan,

If you don't mind tell us all about the feedpoint autocoupler, autotuner?

What was it, did it work well, &c.

73

DR
 On Mar 13, 2015 9:29 PM, "stan levandowski" <sjl219 at optonline.net> wrote:

> Best if all remained open-minded about mag loops.  They date to WWII.  I
> scratch built one from 2" copper for 14 Mhz.  Its diameter was less than 3
> feet.  I used a gamma match.  I also used a small one rpm motor to tune a
> Jennings variable cap remotely.  I set it up in a wooden frame on my
> driveway about 10" off the pavement.  My transceiver was an Elecraft KX1 on
> 8 "AA" batteries which translated to about 1.3+/- watt output.  My first
> contact was Gene, UA1CE in St. Petersburg on 10/26/2010 for a 439.  Then
> again on 4/28/2011 for 559 and finally on 5/18/2011 for a 549. I also
> worked all over Europe and into Africa with it, all at QRP or QRPp levels.
> It received as well as my dipole but with lower noise.  Yes, it's
> definitely a compromise antenna but it was a neat experiment and, by golly,
> I had fun AND I learned a few things.  Eventually I grew weary of the
> extremely narrow tuning range and gave it away, returning to my 94' CF Zepp
> with a feedpoint autocoupler.
> 73, Stan WB2LQF
>
>
> On Fri, Mar 13, 2015 at 07:13 PM, D.J.J. Ring, Jr. via CW wrote:
>
> Or an Elephant Cage.
>
> Too big for condo.
>
> DR
> On Mar 13, 2015 6:45 PM, "Brian Carling" <bcarling at cfl.rr.com> wrote:
>
>> Yes that's a reasonable assessment.
>>
>> If someone really wants a directional receive antenna they will be far
>> better served with a ring of 6 verticals
>>
>> Best regards - Brian Carling
>> AF4K Crystals Co.
>> 117 Sterling Pine St.
>> Sanford, FL 32773
>>
>> Tel: +USA 321-262-5471
>>
>>
>>
>>
>> On Mar 13, 2015, at 1:29 PM, Danny Douglas via CW <cw at mailman.qth.net>
>> wrote:
>>
>> We had loops on some embassies, back in the 70s, and 80s, but I have no
>> idea who built them, although believe they were American made.  I would
>> personally avoid them, if at all possible, but --- anything is better than
>> nothing.
>>
>>   D.J.J. Ring, Jr. via CW <cw at mailman.qth.net>
>>  Friday, March 13, 2015 2:16 PM
>> Hello - Off Topic but indulge me.
>>
>> I have never seen loops as well made.  I know a few on this group who
>> have written me about "what do I do when I want to get on the air and I
>> sold my home and I'm living in senior housing, etc." - this might be an
>> answer.
>>
>> I received a mail today about manufactured mag loops.  Europe is doing
>> nicely making these antenna complete with auto tuners.  Nice looking.
>>
>> http://inac-radio.com/en/Antenas-AX/AX330
>> There are other versions, so snoop around the web site.
>> http://inac-radio.com/en/
>>
>> Quite expensive, but if you have no space, it's a miracle doing what it
>> does.
>>
>> Just look at the Q this antenna has as the man finger-dials the remote
>> control tuning.  Impressive.
>>
>> Here is another one
>> http://media.wix.com/ugd/1aa222_6019d1b38a894817ba13ade7f79e2c77.pdf
>>
>> Fascinating!
>>
>> Before we get into a Dummy Load word-war, these antennas are a trade off,
>> but they beat a light bulb on a stick or a dummy load by quite a bit.
>>
>> If your exiled to senior citizen condo with no antenna rules, it's
>> perfect for balcony use.
>>
>> Are there any USA/Canadian firms making units as good as these?
>>
>> 73
>> David N1EA
>>
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>>
>> --
>> Danny Douglas
>>
>>
>>  <http://www.getpostbox.com>
>>
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