Return-Path: Received: from rly-dc01.mx.aol.com (rly-dc01.mail.aol.com [172.19.136.30]) by air-dc07.mail.aol.com (v121_r4.4) with ESMTP id MAILINDC071-b0349649d24240; Wed, 07 Jan 2009 07:16:58 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-dc01.mx.aol.com (v121_r4.4) with ESMTP id MAILRELAYINDC017-b0349649d24240; Wed, 07 Jan 2009 07:16:43 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1LKXJH-0008W8-NO for rs_out_1@blacksheep.org; Wed, 07 Jan 2009 12:14:55 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1LKXJH-0008Vy-43 for rsgb_lf_group@blacksheep.org; Wed, 07 Jan 2009 12:14:55 +0000 Received: from vms173001pub.verizon.net ([206.46.173.1]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1LKXJC-0007iT-9Q for rsgb_lf_group@blacksheep.org; Wed, 07 Jan 2009 12:14:55 +0000 Received: from DR2 ([96.237.141.73]) by vms173001.mailsrvcs.net (Sun Java System Messaging Server 6.2-6.01 (built Apr 3 2006)) with ESMTPA id <0KD30071FOO32A43@vms173001.mailsrvcs.net> for rsgb_lf_group@blacksheep.org; Wed, 07 Jan 2009 06:14:28 -0600 (CST) Date: Wed, 07 Jan 2009 07:13:58 -0500 From: "dave.riley3" To: Message-id: <06842B5818DF420484DACD22DEE6D8C7@DR2> MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 X-Mailer: Microsoft Outlook Express 6.00.2900.5512 X-Priority: 3 X-MSMail-priority: Normal References: <501156.55485.qm@web28107.mail.ukl.yahoo.com> <005001c970b9$e4cf6eb0$0301a8c0@mal769a60aa920> X-Karma: 0: X-Spam-Score: 3.5 (+++) X-Spam-Report: autolearn=disabled,FORGED_MUA_OUTLOOK=3.36,HTML_MESSAGE=0.001,HTML_TAG_EXIST_TBODY=0.126 Subject: Re: LF: Razor blade RX .... Try a Cohere? Content-type: multipart/alternative; boundary="----=_NextPart_000_001B_01C97097.8238C160" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.6 required=5.0 tests=CLICK_BELOW,FORGED_MUA_OUTLOOK, HTML_30_40,HTML_LINK_CLICK_HERE,HTML_MESSAGE,HTML_TAG_EXISTS_TBODY 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 ------=_NextPart_000_001B_01C97097.8238C160 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Ah yes, the coherer, worked for me during a reconstruction of the W1AA/Marco= ni event... But lets give credit to latter day technology as well and the Liquid Beretta= , that truly sensitive with all AM detection capabilty invented by the augus= t and sublime producer of genius, Reginald Fessenden... Good thing that he had his clues on and that Armstrong used Reggie's heterod= yne principal and also tamed deForest's audion into submission to do noble e= arly radio work... TNX fer your ears... ( and eyes ) EOR ( end of rant ) 30s Dave WD2XSH/17, in the Colonies... =20 ----- Original Message -----=20 From: mal hamilton=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Wednesday, January 07, 2009 6:20 AM Subject: Re: LF: Razor blade RX .... Try a Cohere? It seems everyone is MISSING THE POINT. I want someone to describe how to=20= make RX using a RAZOR blade detector and also how to make the HEADPHONE nee= ded to hear the signal, using the sort of components a soldier would have on= the battlefront or a POW. Stick to the specific topic. I think noone knows how to do it.Think 1940 p= eriod and what was available. g3kev ----- Original Message -----=20 From: M0FMT=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Tuesday, January 06, 2009 11:23 PM Subject: Re: LF: Razor blade RX .... Try a Cohere? Hi Mal and LF I am disapointed in you Mal to be considering an envelope detector= . A true CW man, I would have thought, should only entertain the use of a Co= here detector! Having played with them, I was surprised how well they work over a= range 136kc/s to 433mc/s (the extent of my power RF O/P) probably work over= a much lager range of frequencies but not tested by me. http://home.earthlink.net/~lenyr/coherer.htm 73 pefmt --- On Tue, 6/1/09, mal hamilton wrote: From: mal hamilton Subject: Re: LF: Razor blade RX To: rsgb_lf_group@blacksheep.org Date: Tuesday, 6 January, 2009, 9:21 PM Your own cct and ideas and the headphone construction. Not info=20= from the web. g3kev ----- Original Message -----=20 From: riese-k3djc@juno.com=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Tuesday, January 06, 2009 7:58 PM Subject: Re: LF: Razor blade RX 310113517964 E bay too On Tue, 6 Jan 2009 18:00:45 -0000 "mal hamilton" writes: Since I mentioned a Razor blade and fence wire RX a while ba= ck 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 appl= icable to MF/LF since the broadcasts at the time were receicved on these ban= ds. Build one and have a QSO using this RX g3kev ____________________________________________________________=20 Fashion Design Education - Click Here! ------------------------------------------------------------------ No virus found in this incoming message. Checked by AVG - http://www.avg.com=20 Version: 8.0.176 / Virus Database: 270.10.3/1877 - Release Dat= e: 1/5/2009 7:20 PM =20 ---------------------------------------------------------------------------- No virus found in this incoming message. Checked by AVG - http://www.avg.com=20 Version: 8.0.176 / Virus Database: 270.10.3/1879 - Release Date: 1/6/200= 9 5:16 PM ------=_NextPart_000_001B_01C97097.8238C160 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable
Ah yes, the coherer, worked for me during a=20 reconstruction of the W1AA/Marconi event...
 
But lets give credit to latter day technology as= =20 well and the Liquid Beretta, that truly sensitive with all AM detection= =20 capabilty invented by the august and sublime producer of genius, Reginald=20 Fessenden...
 
Good thing that he had his clues on and that Arm= strong=20 used Reggie's heterodyne principal and also tamed deForest's audion into=20 submission to do noble early radio work...
 
TNX fer your ears...  ( and eyes=20 )
 
EOR  ( end of rant )
 
30s
 
Dave WD2XSH/17, in the=20 Colonies...
 
 
----- Original Message -----
mal= =20 hamilton
Sent: Wednesday, January 07, 2009 6= :20=20 AM
Subject: Re: LF: Razor blade RX ...= . Try=20 a Cohere?

It seems everyone is MISSING THE POI= NT. I=20 want someone to describe how to make  RX using a RAZOR blade detector= and=20 also how to make the HEADPHONE needed to hear the signal, using the sort o= f=20 components a soldier would have on the battlefront or a POW.
Stick to the specific topic. I think noon= e knows=20 how to do it.Think 1940 period and what was available.
g3kev
 
----- Original Message -----
From:=20 M0FMT=
Sent: Tuesday, January 06, 2009 1= 1:23=20 PM
Subject: Re: LF: Razor blade RX .= ...=20 Try a Cohere?



No virus found in this incoming message.
Checked by AVG -=20 http://www.avg.com
Version: 8.0.176 / Virus Database: 270.10.3/1879=20= -=20 Release Date: 1/6/2009 5:16 PM
------=_NextPart_000_001B_01C97097.8238C160--
Hi Mal and LF
 
I am disapointed in you Mal to be considering an envelop= e=20 detector. A true CW man, I would have thought, should only=20 entertain the use of a Cohere detector!
 
Having played with them, I was surprised how well they work o= ver=20 a range 136kc/s to 433mc/s (the extent of my power RF O/P) probabl= y=20 work over a much lager range of frequencies but not tested by=20 me.
 
 
73 pefmt
 


--- On Tue, 6/1/09, mal hamilton=20 <g3kevmal@talktalk.net> wrote:
From:=20 mal hamilton <g3kevmal@talktalk.net>
Subject: Re: LF: R= azor=20 blade RX
To: rsgb_lf_group@blacksheep.org
Date: Tuesday, 6= =20 January, 2009, 9:21 PM

Your own cct and ideas and the=20 headphone construction. Not info from the web.
g3kev
 
----- Original Message ----- <= /DIV>
Sent: Tuesday, January=20= 06,=20 2009 7:58 PM
Subject: Re: LF: Razor=20= blade=20 RX

310113517964   E bay too
 
On Tue, 6 Jan 2009 18:00:45 -0000 "mal hamilton" <g3kevmal@talktalk.net> writes:
Since I mentioned a Razor b= lade and=20 fence wire RX a while back I have had several requests for a= =20 circuit. To give others the opportunity to submit=20= a=20 cct I will await replies. This method was used successf= ully=20  at Coldiz and other POW camps to receive BBC=20 broadcasts.
Let us know how you would a= pproach=20 the subject. This is applicable to MF/LF since the broadcast= s at=20 the time were receicved on these bands.
Build one and have a QSO us= ing this=20 RX
g3kev
 
 


____________________________________________= ________________=20
Fashion Design Education - Click=20 Here!

No virus found in this incoming message.
Che= cked=20 by AVG - http://www.avg.com
Version: 8.0.176 / Virus Datab= ase:=20 270.10.3/1877 - Release Date: 1/5/2009 7:20=20 PM