[Lowfer] Fwd: LF: VE7Sl design Octoloop - Opera 8 with VE7BDQ

Laurence KL7 L hellozerohellozero at hotmail.com
Fri Sep 20 14:36:27 EDT 2013 

Lower loop wires are 6ft off the ground supported by a concreted 4  x 4 Mitch - and yes not sure if its aperture plus noise nulling - im going to be playing with it a little more and try out my old k0lr remote tuning loop amp and see how that goes. Interesting to look at how the mag and E receives the sigs on sky wave differently...or appears that way!

L


On Sep 20, 2013, at 8:58, "Mitch Powell" <mitch.powell at sympatico.ca> wrote:

> G'Day Laurence:
> Same Octoloop here - 12 footer - with base 18 feet off ground.
> What is the height of your loop for these tests ?
> S/N always better here with the Octoloop - compared to active antenna -
> I assume some of the apparent advantage I see is because the loop
> benefits from the directional characteristics compared to the vertical.
> 
> Thanks for the report - velly interesting !
> Mitch
> On 2013-09-20, at 12:25 PM, Laurence KL7 L wrote:
> 
>> I shared this but have just done another overnite run with Johns signal at Op 32. Poorer conditions but the results were very similar but averaging out the loop has it - just
>> 
>> Laurence
>> 
>> 
>> 
>> 
>> 
>>> From: Laurence KL7 
>>> Subject: LF: VE7Sl design Octoloop  - Opera 8 with VE7BDQ
>>> 
>>> 
>>> I was testing overnight on 137 using VE7BDQ's Op8 signal as a reference  over a 1300 mile path (thanks John).
>>> 
>>> The goal to was confirm my clone of the 10ft diameter VE7SL Octoloop was working ok (thanks Steve). 
>>> 
>>> I was way off main bearing towards John but interesting results between  my main (and previously best here) rx antennae for 137 the L400B probe up a selected Birch tree by the lake, and this new "inter-looper".
>>> 
>>> Overall the loop provided an averaged out better signal/noise with last nights propagation, but as can be seen from below it wasnt always the case for every tx period - and thats not selecting the bearing with max signal from John or nulling out the do-doo from the local QRM makers. It was up to 3 or 4dB either way...
>>> 
>>> It was overall a close run thing but there were however more positive decodes on the loop than the probe which is good for me here, especially as I hadnt tweaked the bearings.  Im going to do the same for the loop on MF tonight if it stops raining...
>>> 
>>> UTC  Band  Call     Mode  S/N ref  S/N diff over probe (see bottom)
>>> 
>>> 13:44    136 VE7BDQ Op8 -33 dB     0
>>> 13:35    136 VE7BDQ Op8 -25 dB    -1
>>> 13:26    136 VE7BDQ Op8 -23 dB     -1
>>> 13:18    136 VE7BDQ Op8 -23 dB    +1
>>> 13:09    136 VE7BDQ Op8 -26 dB    +1
>>> 13:01    136 VE7BDQ Op8 -29 dB     0
>>> 12:52    136 VE7BDQ Op8 -29 dB     +2
>>> 12:35    136 VE7BDQ Op8 -29 dB     -1
>>> 12:18    136 VE7BDQ Op8 -31 dB     0
>>> 12:10    136 VE7BDQ Op8 -24 dB     +1
>>> 12:01    136 VE7BDQ Op8 -25 dB     +1
>>> 11:52    136 VE7BDQ Op8 -24 dB     +1
>>> 11:44    136 VE7BDQ Op8 -29 dB     -1
>>> 11:27    136 VE7BDQ Op8 -31 dB     +2
>>> 11:10    136 VE7BDQ Op8 -24 dB     +1
>>> 11:01    136 VE7BDQ Op8 -26 dB     +1
>>> 10:53    136 VE7BDQ Op8 -30 dB     -3
>>> 10:44    136 VE7BDQ Op8 -28 dB     +2
>>> 10:36    136 VE7BDQ Op8 -25 dB     +3
>>> 10:27    136 VE7BDQ Op8 -25 dB     +1
>>> 10:18    136 VE7BDQ Op8 -26 dB     -1
>>> 10:10    136 VE7BDQ Op8 -30 dB     -3
>>> 10:01    136 VE7BDQ Op8 -31 dB     -3
>>> 09:53    136 VE7BDQ Op8 -29 dB    -3
>>> 09:44    136 VE7BDQ Op8 -30 dB    -2
>>> 09:27    136 VE7BDQ Op8 -28 dB     +1
>>> 09:19    136 VE7BDQ Op8 -28 dB     -1
>>> 09:01    136 VE7BDQ Op8 -33 dB     >
>>> 08:53    136 VE7BDQ Op8 -27 dB     0
>>> 08:44    136 VE7BDQ Op8 -25 dB     0
>>> 08:36    136 VE7BDQ Op8 -23 dB     -1
>>> 08:27    136 VE7BDQ Op8 -25 dB    0
>>> 08:19    136 VE7BDQ Op8 -30 dB     0
>>> 08:10    136 VE7BDQ Op8 -28 dB     -2
>>> 08:02    136 VE7BDQ Op8 -23 dB     0
>>> 07:53    136 VE7BDQ Op8 -23 dB     0
>>> 07:45    136 VE7BDQ Op8 -26 dB     -1
>>> 07:36    136 VE7BDQ Op8 -24 dB     +1
>>> 07:27    136 VE7BDQ Op8 -25 dB     +1
>>> 07:19    136 VE7BDQ Op8 -26 dB     0
>>> 07:10    136 VE7BDQ Op8 -30 dB     +4
>>> 07:02    136 VE7BDQ Op8 -29 dB     +2
>>> 06:53    136 VE7BDQ Op8 -34 dB     >
>>> 06:45    136 VE7BDQ Op8 -27 dB     0
>>> 06:36    136 VE7BDQ Op8 -26 dB     +1
>>> 06:19    136 VE7BDQ Op8 -31 dB     +3
>>> 06:11    136 VE7BDQ Op8 -31 dB     >
>>> 06:02    136 VE7BDQ Op8 -25 dB     +2
>>> 05:53    136 VE7BDQ Op8 -26 dB     +2
>>> 05:19    136 VE7BDQ Op8 -33 dB     -1
>>> 05:11    136 VE7BDQ Op8 -32 dB     >
>>>   ***********  18/09/2013  ***********  
>>> 
>>> (Positive integer means better s/n on loop in dB; ">" indicates received on loop not L400B)
>>> 
>>> Laurence KL7L
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