Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

Re: LF: Optimizing Ferrite Rod Antennas - OT?

To: [email protected]
Subject: Re: LF: Optimizing Ferrite Rod Antennas - OT?
From: DK1IS <[email protected]>
Date: Fri, 20 Jul 2018 22:41:28 +0200
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kabelmail.de; s=mail; t=1532119140; bh=19mJ27iNYW+Fen1jNqkGG0C+nZIkZv7javLXytIKH5k=; h=Subject:To:References:From:Date:MIME-Version:In-Reply-To: Content-Type; b=cAQ+SaN1tNtD0L45/nNpB8OSrNUT9lwXvSMFC2ds1NXZrx7PSBccpje9TqfJRZSuQ GF7rAFBAREly80hgZVOwqNpQ2441/ucvqAuf4OqJ0Gj6sJqJSw9lMubY62rhzfLdy/ XX0cuEcVDxmTBe+/xGhrehJ2ImJAdCvhq+9NpikU=
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1
Hi LF, Mike and Roman,

Thanks for your feedback! Sri, Roman, no more than five words of Russian here - so many interesting information being excluded! But at least the pictures tell a lot.

Concerning once more ferrite antennas: another most interesting paper is the PhD dissertation of David Gibson:

Channel Characterisation and System Design for Sub-Surface Communications;
etheses.whiterose.ac.uk/4169/1/uk_bl_ethos_270894.pdf

Dealing primarily with communication tasks in caves and mines, especially in section 4  there is a lot of information about loop antennas with and without ferrite cores. The other sections  are worth reading as well - many of the challenges in sub-surface communication seem to be similar to our own.

73,
Tom, DK1IS



Am 20.07.2018 um 17:33 schrieb Roman:
Hi LF, Mike, Tom!

Will be helpful for anybody, but on russian language:

Old discussion at 136.su russian LF forum about ferrite ants and DM4TR grabber with ferrite ant practical results:

http://136.su/index.php/topic,119.0.html

The other old discusion on radioscanner.ru forum:

http://www.radioscanner.ru/forum/topic22993.html

-Many practical results from different OM's into forum but on HF band mainly.

Russian book - main hand-book of all ferrite antenna designers in Russia:

Khomich V.I. - The receivig ferrite rod antennas, but on russian language only.

http://www.radioscanner.ru/files/antennas/file1138/

The wide-band ferrite rod original practic construction - OLUSHA-T from  Sergey Zadorozhny from Kiev:

http://sezador.radioscanner.ru/articles/solan-t.html

73!
Roman


Tom: Many Thanks for the link to Ben H. Tongues writings. I own and have restored both R-98 and R-20 Blonder-Tongue radios circa 1959 and 1960...(Ben H. Tongue of Blonder-Tongue Labs, Inc.)

The R-98 design stacks the 10.7Mhz IF transformer in series on top of the 455 kHz IF transformer. An interesting approach to a dual band receiver.

The design of the R-98 got me thinking if it was possible to build an optimized LF/MF dual band antenna transformer.... I am not sure if it is worth the effort, with the extra feed line, etc.

The point is that ideas for LF/MF exploration can come from other aspects of the radio art...

73, Mike wa3tts

-----Original Message-----
From: DK1IS <[email protected]>
To: rsgb_lf_group <[email protected]>
Sent: Thu, Jul 19, 2018 4:59 pm
Subject: LF: Optimizing Ferrite Rod Antennas - OT?

Hello group,

To whom it may concern: cleaning up my old laptop I happened to find a
file from Ben H. Tongue dealing with the optimisation of ferrite rod
antennas:

http://kearman.com/bentongue/xtalset/29MxQFL/29MxQFL.html

Coming originally from the crystal radio people some design aspects in
the article could be interesting for our VLF, LF and MF work too - if
not already known.

73,
Tom, DK1IS


<Prev in Thread] Current Thread [Next in Thread>