Re: LF: Re: Sub-9kHz walkabout tests

To:	[email protected]
Subject:	Re: LF: Re: Sub-9kHz walkabout tests
From:	Roger Lapthorn <[email protected]>
Date:	Tue, 11 May 2010 15:55:10 +0100
Dkim-signature:	v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:content-type; bh=+5Pusp2wdEzVqPK3QBWE39Z5T8Hzb+gcHUw9BBUHg2s=; b=ZLUzOlR5NPADiDF3VSSpcYuyOgv36TsZP8NIQLk82vnUiO1RpAD+ONtN98metBHp4d jFLe07nKtrAW44zg8DyYD87z5jnXqOgxi7a3HfOJZEiN+64CpvC8pAW0Xf4ptqjBpsUY tl03hKr8a6+LQb3PgCFJ0wJ/osS8tx4VoNtbE=
Domainkey-signature:	a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=fr7CJI4tUzH58atCbELiikQuMLSgZUkfHOo4PhGH6gcT2cXNT9Q4vuG0uRbrSk6Wy8 2+yaADVaZXwGgUbNpcHkPSP99QjcxCAU6i12dcsGJoH0RZwDY1TK2gloRNTGOp2nMBMX wlNNNAzCVl+1NgitS0271pZuygt67lIaxM49Y=
Domainkey-status:	good (testing)
In-reply-to:	<28093526.109907.1273582377168.JavaMail.fmail@mwmweb078>
References:	<[email protected]> <[email protected]> <[email protected]> <28093526.109907.1273582377168.JavaMail.fmail@mwmweb078>
Reply-to:	[email protected]
Sender:	[email protected]

There are several sources in the UK for toroidal mains transformers with various step-down ratios. See for example http://www.airlinktransformers.com/toroidal-transformers.asp . These sell for £12 to £20 for ratings up to 160VA. They are available up to at least 1kVA, but get expensive.

What is the best former material to use to wind your own tapped step-up transformer for this sort of application and where can you get it?

73s
Roger G3XBM

On 11 May 2010 13:52, Horst Stöcker <[email protected]> wrote:

Hello J. B.
in the wellknown standard work of John Tailor G0AKN exactly this is the method. He used a 70V transformer.

And I started with an autio-transformer. too. Here the standard is 100V. After I had blown my audio-transformer I changed to a troroidal transformer for 220/15V.

Horst DO1KHS/DI2AN

-----Ursprüngliche Nachricht-----
Von: John Bruce McCreath <[email protected]>
Gesendet: 11.05.2010 14:33:08
An: [email protected]
Betreff: Re: LF: Re: Sub-9kHz walkabout tests

>Hello LFers,
>
>I'm finding the posts related to the "dreamers band" quite interesting and it's nice to read of the various methods
>that are being tried. Has anyone used a PA amplifier with a 70 volt output (as used in stores, offices, etc) as a
>means of delivering some power into a pair of ground rods?
>
>73, J.B., VE3EAR
>
>LowFER Beacon "EAR"
>188.830 kHz. QRSS30
>
>
>
>
>
>

___________________________________________________________
GRATIS: Movie-Flat mit über 300 Top-Videos. Für WEB.DE Nutzer
dauerhaft kostenlos! Jetzt freischalten unter http://movieflat.web.de

--
http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
http://www.youtube.com/user/g3xbm
G3XBM GQRP 1678 ISWL G11088

<Prev in Thread]	Current Thread	[Next in Thread>
LF: Sub-9kHz walkabout tests, Roger Lapthorn Re: LF: Sub-9kHz walkabout tests, Horst Stöcker LF: Re: Sub-9kHz walkabout tests, Roger Lapthorn Re: LF: Re: Sub-9kHz walkabout tests, John Bruce McCreath Re: LF: Re: Sub-9kHz walkabout tests, Horst Stöcker Re: LF: Re: Sub-9kHz walkabout tests, Roger Lapthorn <= LF: Re: Sub-9kHz walkabout tests, Dave Sergeant LF: DI2AN transmitting now until tommorrow morning, Horst Stöcker LF: RE: DI2AN transmitting now until tommorrow morning, Rik Strobbe Re: LF: RE: DI2AN transmitting now until tommorrow morning, Horst Stöcker RE: LF: RE: DI2AN transmitting now until tommorrow morning, Rik Strobbe RE: LF: RE: DI2AN transmitting now until tommorrow morning, Scholz, Marco RE: LF: RE: DI2AN transmitting now until tommorrow morning, Rik Strobbe RE: LF: RE: DI2AN transmitting now until tommorrow morning, Horst Stöcker LF: RE: DI2AN transmitting now until tommorrow morning, victor13 VLF: TV transformer, Stefan Schäfer

Previous by Date:	Re: LF: Re: Sub-9kHz walkabout tests, Horst Stöcker
Next by Date:	LF: Re: Sub-9kHz walkabout tests, Dave Sergeant
Previous by Thread:	Re: LF: Re: Sub-9kHz walkabout tests, Horst Stöcker
Next by Thread:	LF: Re: Sub-9kHz walkabout tests, Dave Sergeant
Indexes:	[Date] [Thread] [Top] [All Lists]