From: Roman <rw3adb@YANDEX.ru>
To: rsgb_lf_group@blacksheep.org
In-Reply-To: <CAKvcm2e8uxWOAH5AfRdWqW9kiQ=2DaboOH4V3v2hBujxnZF=Ug@mail.gmail.com>
References: <CAKvcm2cJtu=F5yHvR53Vkvf5bb8J1BQVKi9U4g-kupA+6i1=UA@mail.gmail.com>
	 <CAKvcm2e-MyjDe=SJ8K0HhYczVtYCc0n0cSnaZeRHWLSa_TTgwQ@mail.gmail.com> <838331547312316@sas1-0a6c2e2b59d7.qloud-c.yandex.net> <CAKvcm2e8uxWOAH5AfRdWqW9kiQ=2DaboOH4V3v2hBujxnZF=Ug@mail.gmail.com>
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Date: Sat, 12 Jan 2019 23:42:28 +0300
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Subject: Re: LF: Re: a lot of ferrite
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GD Dimitris!

Yes, auto-translator working is not so bad from russian to english if messages wrote correctly, not on slang.
The thech terms and short description translate correctly and understoodable.

Several years ago at 2010 I translate tech text from russian to french and Op who is not understood russian and english understood ideas into text very well!

I think own russian experiments will be interesting if you interest about ferrite rod ants!

73!
Roman, RW3ADB

> Hi Roman,
> 
> thanks for the links, I would have never found them through a search
> engine as I don't speak russian. Looks like an interesting discussion,
> I will certainly have a read. To my surprise, the automatic
> translation does a reasonably good job!
> 
> 73, Dimitris VK2COW
> 
> Στις Κυρ, 13 Ιαν 2019 στις 4:01 π.μ., ο/η Roman <rw3adb@yandex.ru> έγραψε:
> 
>> Hello Dimitris!
>>
>> A lot of interesting info about ferrite rod ants and results, but on Russian language:
>>
>> http://136.su/index.php/topic,119.0.html
>>
>> Use translator babelfish or other and use links and schematics.
>>
>> At once - UA3AGC from Minussinsk, East Siberia NO66, nr Krasnoyarsk was received in DM4TR location JO61de - QRB ~5000 km! - and VO1NA also too!
>>
>> UA3AGC DE DM4TR
>> http://136.su/index.php/topic,18.msg7095.html#msg7095
>> http://136.su/index.php/topic,119.msg7099.html#msg7099
>>
>> VO1NA DE DM4TR
>> http://136.su/index.php/topic,119.msg13881.html#msg13881
>>
>> The ferrite rod ant was used on DM4TR grabber in great QRM from local MW broadcast situated in near QTH - ~ 900m!
>> The great RX reports was in that situation!
>>
>> The other great forum topic and results will be interesting for you on the other russian forum:
>>
>> http://www.radioscanner.ru/forum/topic22993.html
>>
>> 73!
>> Roman, RW3ADB
>>
>>> Minor correction, the calculated relative permeability should be about
>>> 500, I made a mistake in the initial calculation. I just discover why
>>> they call it initial permeability (bad joke) :-)
>>>
>>> 73, Dimitris VK2COW
>>>
>>> Στις Σάβ, 12 Ιαν 2019 στις 2:48 μ.μ., ο/η Dimitrios Tsifakis
>>> <dtsifakis@gmail.com> έγραψε:
>>>
>>>> Hi LF group,
>>>>
>>>> I have managed to acquire a few very large ferrite rods (36 cm x 10 cm
>>>> x 2 cm). The material is unknown but I managed to form a square
>>>> 'toroid' with four of them (they are heavy so gravity was enough to
>>>> keep everything in place for a measurement) and I measured about 15 uH
>>>> for 4 turns at 0.1 MHz, which if I have done the calculations
>>>> correctly implies a relative permeability of about 1000.
>>>>
>>>> The R of the impedance of the square loop was low (<0.2 ohm) at 0.1
>>>> MHz and it increased fast with frequency (170 ohm at 5 MHz!).
>>>>
>>>> The question is, what LF/VLF experiment would you do if you had half a
>>>> dozen of these rods?
>>>>
>>>> 73, Dimitris VK2COW
>> --
>> 73!
>> Roman, RW3ADB
-- 
73!
Roman, RW3ADB