Return-Path: Received: from rly-md08.mx.aol.com (rly-md08.mail.aol.com [172.20.29.146]) by air-md09.mail.aol.com (v121_r4.4) with ESMTP id MAILINMD091-91a4964a3bc2e7; Wed, 07 Jan 2009 07:45:00 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-md08.mx.aol.com (v121_r4.4) with ESMTP id MAILRELAYINMD082-91a4964a3bc2e7; Wed, 07 Jan 2009 07:44:46 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1LKXld-0000su-44 for rs_out_1@blacksheep.org; Wed, 07 Jan 2009 12:44:13 +0000 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1LKXlc-0000sl-GU for rsgb_lf_group@blacksheep.org; Wed, 07 Jan 2009 12:44:12 +0000 Received: from web28103.mail.ukl.yahoo.com ([217.146.182.123]) by relay3.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1LKXlc-0000bD-BY for rsgb_lf_group@blacksheep.org; Wed, 07 Jan 2009 12:44:12 +0000 Received: (qmail 93476 invoked by uid 60001); 7 Jan 2009 12:44:07 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.co.uk; h=X-YMail-OSG:Received:X-Mailer:Date:From:Reply-To:Subject:To:MIME-Version:Content-Type:Message-ID; b=1z+37gzHmi9Gq/Lg3cepT8ICK2KBEfqL5RExboQcOBBNI7Tgv5BJP00dE79ZXze32eJznU/ey1YwZd6R97of3UOQt+IT/kImUnKsfqt2NEAwG4c6mogQy1Zyr5fNcZ/nvHwGO2RRsojI5BqFuUB+oReubbV0Vjd80jx0cP08CtM=; X-YMail-OSG: jUM9WF4VM1lU1cossAYWrmORqTUFA5GsiC7MnL6qqrWifhomy2UWmCx4Nhtz7VJYQe.lukSZt2Fz2HKTt_8NvX2qhUhJ00W1xpSeqNb.y546cfaCRbnmG5LTcrgenCPcDoLb99RFW4qgw3EDmdVzVUMIQL64nlPkkW40NJRWzEvjIpqpRLgnxeUpSdmNgbkXCLSI7W4R5oyohQ-- Received: from [86.130.69.9] by web28103.mail.ukl.yahoo.com via HTTP; Wed, 07 Jan 2009 12:44:06 GMT X-Mailer: YahooMailWebService/0.7.260.1 Date: Wed, 7 Jan 2009 12:44:06 +0000 (GMT) From: M0FMT To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Message-ID: <24804.93209.qm@web28103.mail.ukl.yahoo.com> DomainKey-Status: good (testing) Subject: Re: LF: Razor blade RX Content-Type: multipart/alternative; boundary="0-1894922206-1231332246=:93209" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=HTML_MESSAGE autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-AOL-IP: 193.82.116.20 --0-1894922206-1231332246=:93209 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable OK Mal =C2=A0 What actually is the challenge then? =C2=A0 Just to make an RX using a razor blade as the guys in Coldiz did?=20 An Rx to receive AM broadcast stations on the Medium wave or Long wave BC ba= nds? I think that RX has been described previously in these exchanges. Or are you asking for one to be actually made and demonstrated? Or do you just want a shopping list of things to be stolen of their captors=20= to make the RX? Together with a technical description of how the whole thing= works?=C2=A0 Shopping list like:- Razor blade, wire, telephone earpiece, pencil, safety p= in, sliver paper for cap etc? But in more detail, the razor blade being a bi= t of a Red Herring because most oxides on metal surfaces will exhibit a none= linear conduction characteristic required for=C2=A0AC rectification e.g the= rusty nail effect beloved by the old C&G RAE..=C2=A0=C2=A0 =C2=A0 Or have you got a "Smart Alec" solution?=C2=A0 =C2=A0 Please specify! =C2=A0 Regards 73 Petefmt --- On Wed, 7/1/09, mal hamilton wrote: From: mal hamilton Subject: Re: LF: Razor blade RX To: rsgb_lf_group@blacksheep.org Date: Wednesday, 7 January, 2009, 11:38 AM Please answer the question. I did not ask if it could be used on 500 at=20 present., but if so one would TX using MCW or Keyed Tone and old spy tric. g3kev ----- Original Message -----=20 From: "Rik Strobbe" To: Sent: Tuesday, January 06, 2009 9:53 PM Subject: Re: LF: Razor blade RX > Mal, > > I did build a "crystal radio" with a razor blade as detector when I > was 14 years old. > It had to be rusty to work properly and even then it was a very poor=20 > detector. > And it is an AM detector, so not useable for ham signals on 500kHz. > > 73, Rik ON7YD - OR7T > > > Quoting mal hamilton : > >> Since I mentioned a Razor blade and fence wire RX a while back I >> have had several requests for a circuit. To give others the >> opportunity to submit a cct I will await replies. This method was >> used successfully at Coldiz and other POW camps to receive BBC >> broadcasts. >> Let us know how you would approach the subject. This is applicable >> to MF/LF since the broadcasts at the time were receicved on these >> bands. >> Build one and have a QSO using this RX >> g3kev >> > > > > Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm > > ----------------------------------------------------------------------------= ---- No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.176 / Virus Database: 270.10.3/1879 - Release Date: 1/6/2009=20 5:16 PM =20 --0-1894922206-1231332246=:93209 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
OK Mal
 
What actually is the challenge then?
 
Just to make an RX using a razor blade as the guys in Coldiz did?
An Rx to receive AM broadcast stations on the Medium wave or Long wave=20= BC bands?
I think that RX has been described previously in these exchanges.
Or are you asking for one to be actually made and demonstrated?
Or do you just want a shopping list of things to be stolen of their cap= tors to make the RX? Together with a technical description of how the whole=20= thing works? 
Shopping list like:- Razor blade, wire, telephone earpiece, pencil, saf= ety pin, sliver paper for cap etc? But in more detail, the razor blade being= a bit of a Red Herring because most oxides on metal surfaces will exhibit a= none linear conduction characteristic required for AC rectification e.= g the rusty nail effect beloved by the old C&G RAE..  
 
Or have you got a "Smart Alec" solution? 
 
Please specify!
 
Regards 73 Petefmt

--- On Wed, 7/1/09, mal hamilton <g3= kevmal@talktalk.net> wrote:
From: mal hamilton <g3kevmal@talktalk.net>
Sub= ject: Re: LF: Razor blade RX
To: rsgb_lf_group@blacksheep.org
Date: We= dnesday, 7 January, 2009, 11:38 AM

Please answer the question. =20=
I did not ask if it could be used on 500 at=20
present., but if so one would TX using MCW or Keyed Tone and old spy tric.
g3kev

----- Original Message -----=20
From: "Rik Strobbe" <Rik.Strobbe@fys.kuleuven.be>
To: <rsgb_lf_group@blacksheep.org>
Sent: Tuesday, January 06, 2009 9:53 PM
Subject: Re: LF: Razor blade RX


> Mal,
>
> I did build a "crystal radio" with a razor blade as detector
when I
> was 14 years old.
> It had to be rusty to work properly and even then it was a very poor=20
> detector.
> And it is an AM detector, so not useable for ham signals on 500kHz.
>
> 73, Rik  ON7YD - OR7T
>
>
> Quoting mal hamilton <g3kevmal@talktalk.net>:
>
>> Since I mentioned a Razor blade and fence wire RX a while back I
>> have had several requests for a circuit. To give others the
>> opportunity to submit a cct I will await replies. This method was
>> used successfully  at Coldiz and other POW camps to receive BBC
>> broadcasts.
>> Let us know how you would approach the subject. This is applicable
>> to MF/LF since the broadcasts at the time were receicved on these
>> bands.
>> Build one and have a QSO using this RX
>> g3kev
>>
>
>
>
> Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm
>
>


----------------------------------------------------------------------------=
----



No virus found in this incoming message.
Checked by AVG - http://www.avg.com
Version: 8.0.176 / Virus Database: 270.10.3/1879 - Release Date: 1/6/2009=20
5:16 PM

=20 --0-1894922206-1231332246=:93209--