It seems everyone is MISSING THE POINT. I want someone to describe
how to make RX using a RAZOR blade detector and also how to make
the HEADPHONE needed 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 period and what was available.
g3kev
----- Original Message -----
From: M0FMT
To: [email protected]
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 Cohere 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 <[email protected]> wrote:
From: mal hamilton <[email protected]>
Subject: Re: LF: Razor blade RX
To: [email protected]
Date: Tuesday, 6 January, 2009, 9:21 PM
Your own cct and ideas and the headphone construction. Not
info from the web.
g3kev
----- Original Message -----
From: [email protected]
To: [email protected]
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"
<[email protected]> writes:
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
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