Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id wBIEqEkI003717 for ; Tue, 18 Dec 2018 15:52:20 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1gZGeZ-0002Kj-Nk for rs_out_1@blacksheep.org; Tue, 18 Dec 2018 14:47:23 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1gZGeY-0002KZ-6Z for rsgb_lf_group@blacksheep.org; Tue, 18 Dec 2018 14:47:22 +0000 Received: from mail-ed1-x529.google.com ([2a00:1450:4864:20::529]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1gZGeV-000355-19 for rsgb_lf_group@blacksheep.org; Tue, 18 Dec 2018 14:47:21 +0000 Received: by mail-ed1-x529.google.com with SMTP id x30so14108116edx.2 for ; Tue, 18 Dec 2018 06:47:18 -0800 (PST) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=ypbiMYfXNmzlPmedtVvoMkGKsNVEDNjop+1+uuK6lXQ=; b=nxVpNRCaHUC11ZyK9zADPplh29kJssM1FgkmwH4i7TWKPAq+HtHSN3kYrNVatDV9s1 dP61HZExU/JpNjwG3E2ASKg6d3cp2JSzMbRPjRzkru9caq+DxhZR6NxuqSagTUORO1jC k48Js3c/4IimOw4En7wf5XWUm2i7gVTGqxcKG3FT0UdoGgOGeDhzs8x8ZOM3hKf4oPHN rSVwXaMONz7wvlKshZsEeSd8yiS9aqnFLeN8pEpXhYulWaFH4kjK5PZh4a+Tbfm4WEQk QjQUDv9j2Uyp3E8CuzAWPXknpo1rA5rN/JgYiy3YRQ28H/jYxtx+EQKacMlu5iL1LTRh ksww== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=ypbiMYfXNmzlPmedtVvoMkGKsNVEDNjop+1+uuK6lXQ=; b=W+AffT4TXhMGjrFPXfr9aV1bD8rEzhy4JPOUv6nuZwntqMQ0rC5X0C9PTVOqSjy6jz VsqSeVlEYCYJtMseaBCOcNuF94ElPLaRZAvo7bJOMMTNCYWTe1accPpsgE4dU3EFDwcx M2An6niogkuMSFMS0A354z9ZBALtuSfl7g28pVBYm3yc6RkYf5p5iWzxjfBdqNnXyUYi o744mZMN8eB9SMQvl6MBO3aKcuILUzxlkGpOstki0HAQMbZc3OM+DmvpN3uGlVHWmVfU NRAik4y5r2SjOHgHhlhrum2XGeH5ioA355I6ogj9kCjUzGBrvjz7n0O4h53zgyctxnGm gKFQ== X-Gm-Message-State: AA+aEWY67Ynz1ZQsMPqLbEVaolULzLcE8HbduvqAN5UrpYKd9DZnsEQG p7ZTJd+ML8JQyBspmMOjMFAXdxNgUzBWipd3IwqW7G72 X-Google-Smtp-Source: AFSGD/WfwXuc2ht8LgZtnH9o7nTLn1mgOznM76ZBnqGUu3h/3K2C5RqixLl0/aVNS0cN/C2a7O4BDNOHsXCgAEDycds= X-Received: by 2002:a50:f5f4:: with SMTP id x49mr17182378edm.26.1545144438164; Tue, 18 Dec 2018 06:47:18 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: Andy Talbot Date: Tue, 18 Dec 2018 14:47:04 +0000 Message-ID: To: rsgb-lf-group@groups.io Cc: "rsgb_lf_group@blacksheep.org" , "Discussion of the Lowfer (US, European, & UK) and MedFer bands" X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: and another thought ... I believe a number of OPs use sources that genberate at 2* RF and the PA does the frequency division. Clearly getting a 180 deg phase shift isn't possible here, as it would nee [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [2a00:1450:4864:20:0:0:0:529 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (andy.g4jnt[at]gmail.com) 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: cd79e98bb57cf38a756c15469b5a993e Subject: Re: LF: Re: [rsgb-lf-group] EbNaut LF page Content-Type: multipart/alternative; boundary="0000000000005d0f9f057d4cf969" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.8 required=5.0 tests=HTML_30_40,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 --0000000000005d0f9f057d4cf969 Content-Type: text/plain; charset="UTF-8" and another thought ... I believe a number of OPs use sources that genberate at 2* RF and the PA does the frequency division. Clearly getting a 180 deg phase shift isn't possible here, as it would need a 360 deg shift at 2* Rf. Which is no change. SO what's needed is a circuit that grabs / chops out, (or adds ) a cycle of the drive every time the phase change is requested. WHich ought to be simple enough - but needs a bit of thought. Andy www.g4jnt.com On Tue, 18 Dec 2018 at 14:40, Andy Talbot wrote: > Basically, all you need is the ability to shift the phase of your > transmitted RF by 180 degrees under command of a line from the computer > > This can be done at RF by a number of means - many involving a centre > tapped transformer and changeover switch, or a reversing switch,. Otr at > logic levels using an Exclusive-OR gate. > > Alternatively, if you use a transverter from an audio tone, the audio can > be inverted usng an opamp -1/+1 gain circuit. > > If you feel a write up of possible ideas would be welcome, may consider > summat > > > Andy > www.g4jnt.com > > > > On Tue, 18 Dec 2018 at 14:34, N1BUG wrote: > >> Hi EbNaut LF, >> >> With material from K3RWR and K3SIW I started a page about using >> EbNaut on LF. This is an attempt to help people who are interested >> in using EbNaut on LF but having problems understanding all the >> complexities. >> >> http://www.n1bug.com/lfmf/ebnaut/index.shtml >> >> I hope I will be able to put much more information there. If anyone >> would like to contribute articles, diagrams, photos etc. it will be >> very much appreciated. >> >> I will also try to put some links to other web sites, pages, etc. >> but I don't promise to maintain those as things disappear or URLs >> change. :-) >> >> Speaking only for myself, I am still struggling to understand >> hardware setups. So far, the only EbNaut hardware setup I understand >> well enough to build it is K3RWR. All the others still going over my >> feeble head. ;-) >> >> 73, >> Paul >> >> -=-=-=-=-=-=-=-=-=-=-=- >> Groups.io Links: You receive all messages sent to this group. >> >> View/Reply Online (#8295): https://groups.io/g/rsgb-lf-group/message/8295 >> Mute This Topic: https://groups.io/mt/28792714/393564 >> Group Owner: rsgb-lf-group+owner@groups.io >> Unsubscribe: >> https://groups.io/g/rsgb-lf-group/leave/3425614/1826554425/xyzzy [ >> andy.g4jnt@gmail.com] >> -=-=-=-=-=-=-=-=-=-=-=- >> >> --0000000000005d0f9f057d4cf969 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
and another thought ...
I believe= a number of OPs use sources that genberate at 2* RF and the PA does the fr= equency division.=C2=A0 Clearly getting a 180 deg phase shift isn't pos= sible here, as it would need a 360 deg shift at 2* Rf.=C2=A0 Which is no ch= ange.

SO what's needed is a circuit = that grabs / chops out, (or adds ) a cycle of the drive every time the phas= e change is requested.=C2=A0 =C2=A0 WHich ought to be simple enough - but n= eeds a bit of thought.=C2=A0=C2=A0



On Tue, = 18 Dec 2018 at 14:40, Andy Talbot <andy.g4jnt@gmail.com> wrote:
Basically, all you need = is the ability to shift the phase of your transmitted RF by 180 degrees und= er command of a line from the computer

= This can be done at RF by a number of means - many involving a centre tappe= d transformer and changeover switch, or a reversing switch,.=C2=A0 Otr at l= ogic levels using an Exclusive-OR gate.

= Alternatively, if you use a transverter from an audio tone, the audio can b= e inverted usng an opamp -1/+1 gain circuit.=C2=A0 =C2=A0
=
If you feel a write up of possible ideas would be welco= me, may consider summat


<= div dir=3D"ltr" class=3D"gmail-m_-1604526370562296322gmail_signature">

On Tue, = 18 Dec 2018 at 14:34, N1BUG <paul@n1bug.com> wrote:
Hi EbNaut LF,

With material from K3RWR and K3SIW I started a page about using
EbNaut on LF. This is an attempt to help people who are interested
in using EbNaut on LF but having problems understanding all the
complexities.

http://www.n1bug.com/lfmf/ebnaut/index.shtml

I hope I will be able to put much more information there. If anyone
would like to contribute articles, diagrams, photos etc. it will be
very much=C2=A0 appreciated.

I will also try to put some links to other web sites, pages, etc.
but I don't promise to maintain those as things disappear or URLs
change. :-)

Speaking only for myself, I am still struggling to understand
hardware setups. So far, the only EbNaut hardware setup I understand
well enough to build it is K3RWR. All the others still going over my
feeble head. ;-)

73,
Paul

-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-
Groups.io Links: You receive all messages sent to this group.

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Mute This Topic: https://groups.io/mt/28792714/393564
Group Owner: rsgb-lf-group+owner@groups.io
Unsubscribe: https://groups.io/g/rsg= b-lf-group/leave/3425614/1826554425/xyzzy=C2=A0 [andy.g4jnt@gmail.com]
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