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Date: Mon, 07 Jan 2013 19:34:52 +0100
From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= <Stefan.Schaefer@iup.uni-heidelberg.de>
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References: <52591013-FAE4-489B-8137-61A91BF26751@gmail.com> <50EAFE96.6000400@psk31.plus.com> <AA3DADE8-7060-43A3-8BA2-E4D6DE16B045@gmail.com>
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Subject: Re: LF: More earth electrodes tests at 472kHz
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Hi Roger,

Congrats to the interesting results. I bet many of us have thought that 
the signals will be significantly lower when then system runs on 
batteries. However keep in mind the QSB and changing propagation which 
may influence your results. Best may be to do the tests in daytime and 
in a range below 200 km or so.
The results remember me on my full size dipole experiments in July last 
year. Everybody expected the the signals must be down in the noise but 
later i had several QSOs in normal CW, with a /p equipment...

73, Stefan/DK7FC

Am 07.01.2013 18:36, schrieb Roger Lapthorn:
> Just fed everything from a 12V battery (no mains grounds) and result unchanged. It STILL works.
>
> Now QRT until late this evening as my Internet signal in the rear study where set up temporarily is too weak to reliably sync time without all the doors open! After about 10.30 I'll try again when we go to bed and leave all internal doors open, HI.
>
> Fascinating results.
>
> 73s
> Roger G3XBM
>
> On 7 Jan 2013, at 16:57, g3zjo<g3zjo@psk31.plus.com>  wrote:
>
>    
>> Yes still a good signal.
>>
>> I take it there is no Earth connection via the TX chassis - PSU route either.
>>
>> You know I am pretty sure that round here I would get dreadful hum from 2 earth stakes.
>> When I was the other side of town and much younger I melted the innards of my AVO Multiminor measuring between two earths. Also I ran a 6 Volt fan and charged batteries via a diode between Neutral and an earth spike. The fan would go so fast on a Sunday morning (electric cookers) that it would take off.
>>
>> Eddie
>>
>>
>>
>> On 07/01/2013 16:36, Roger Lapthorn wrote:
>>      
>>> Since 1608gmt I have been WSPRing with an even shorter earth electrode "antenna" ( baseline about 15m) with BOTH ends connected to ground rods in the soil. Max connecting wire height still 1.5m. Yesterday I used the house pipes as one ground.
>>>
>>> Initial tests suggest reports are almost identical, suggesting the true " loop in the ground" hypothesis rather than propagation aided in any way by pipes. This is NOT the case at VLF.
>>>
>>> Most fascinating that this tiny "non antenna" works at all.
>>>
>>> 73s
>>> Roger G3XBM
>>>        
>>      
>