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 w87CimWk023718 for ; Fri, 7 Sep 2018 14:44:49 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1fyG4A-0004kW-3W for rs_out_1@blacksheep.org; Fri, 07 Sep 2018 13:40:50 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1fyG49-0004kN-7i for rsgb_lf_group@blacksheep.org; Fri, 07 Sep 2018 13:40:49 +0100 Received: from mail-oi0-x235.google.com ([2607:f8b0:4003:c06::235]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1fyG45-0000sV-N3 for rsgb_lf_group@blacksheep.org; Fri, 07 Sep 2018 13:40:48 +0100 Received: by mail-oi0-x235.google.com with SMTP id t68-v6so26893224oie.12 for ; Fri, 07 Sep 2018 05:40:45 -0700 (PDT) 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; bh=O4vtj6Zp0/M9NP2t0AVhz3ACM2xCGaHgdYHGGLj9H+g=; b=qiwQusSXdAqleY/a8KXh6fuQ9s5KXUbS7vPYac6T/eXmCWfNVrpohLV0OnnMdRS/od xL1PdNR5nvgdmMI7t43283iKkpbYnh9voAhKV4FYnfvKaXkA6KhcaT0LCuhRqAdq6Tjy tzHCjGYbN5A8c6NTXU2l5eoal+j+UKvpIJ5DN+SONty61PtXvVh598KscZ+wTQ/s/xoD 9zps0ZDqJVYSKvLQIdd+vA24qCkEjHS68y6I0SUOuLNSLv59M8YCh7ak3vJECj5mdGJr UbcZmG1Mh1lwirSJiEU9+AlzN2ynVd2ZVm1tG6Wa89g/PH36BBJWganept68B1u219fc OgSw== 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; bh=O4vtj6Zp0/M9NP2t0AVhz3ACM2xCGaHgdYHGGLj9H+g=; b=aT+9j+jjUAUNvLtYpZbgt4TgDoc4ZO5TlBGpuF4Xe8rXnNQ0WVyaZQJqDRNg6T3zkk YhJEJ9g0J6JMYD+Hzdz8EO68XfuGmw6FyoiA95M3lukOFm4su9awKAl/+M4CH4+2V3eA L8EBeYSQDrLCKxsk/MTBwPNe2TuLX3NfHhOccqpQUQWKjTmy1sC4wJ472MZPpF1VWWWp y4Ojxw9WtbDloiHVsM71ogH/3Yfv5/dP6dp/n+9hmi41YJx6JrO17rG7DrHNQGPPIQUj Fm2w6AweQ7cjQs4zVa9QL+QZO7DEWsdTZF4dWxG8ZXLqUI5HHw1jFbMzhQsKR+Fg0Aj5 bIUg== X-Gm-Message-State: APzg51CjnUR/dY770UkhP9l6ltByJalpffQYZgAVZ+ueO5OYDxUYR3Pt trTDVN1iAlZNdetyS9eUQB0zLX01cEj4GQL8425c5V0s X-Google-Smtp-Source: ANB0Vda9sejHXhS16E1Axf51o2WA18uBh+bqk6JKNcsYWca/I3YB2lM/etlUxCjK840GXy+Z5cdwLjFkxUUYL3+qxmQ= X-Received: by 2002:aca:d509:: with SMTP id m9-v6mr7645872oig.82.1536324043758; Fri, 07 Sep 2018 05:40:43 -0700 (PDT) MIME-Version: 1.0 References: <5B8FD14A.2080403@posteo.de> <14564361536176528@iva5-e9a4c5420a84.qloud-c.yandex.net> <5B904C48.9000302@posteo.de> <13745221536184440@sas1-0a6c2e2b59d7.qloud-c.yandex.net> <5B926595.4090705@posteo.de> In-Reply-To: <5B926595.4090705@posteo.de> From: Domenico IZ7SLZ Date: Fri, 7 Sep 2018 14:40:03 +0200 Message-ID: To: rsgb_lf_group@blacksheep.org 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: Hello Stefan, thanks for sharing your amazing experiments ! Please inform us about impedance measurements data. My LF receiver is online trying to decode WSPR-15, WSPR-2, OPDS32; we are far but i hope to decode you in nighttime, QRN permitting. [...] 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 [2607:f8b0:4003:c06:0:0:0:235 listed in] [list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (iz7slz.domenico[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 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: c1dcf088149efa0360827745859da381 Subject: Re: LF: 137 kHz WSPR-2 on a 900m long ground loop, this weekend Content-Type: multipart/alternative; boundary="000000000000e371ff05754750a5" 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 --000000000000e371ff05754750a5 Content-Type: text/plain; charset="UTF-8" Hello Stefan, thanks for sharing your amazing experiments ! Please inform us about impedance measurements data. My LF receiver is online trying to decode WSPR-15, WSPR-2, OPDS32; we are far but i hope to decode you in nighttime, QRN permitting. This is the link for WSPR decodes: https://www.qsl.net/iz7slz/OPDS/WSPRDECODED.TXT The spots are also uploaded to wsprnet.org Good luck ! 73, Domenico IZ7SLZ On Fri, 7 Sep 2018 at 13:51, DK7FC wrote: > Genosse Roman, LF, > > Yesterday i built a small LF PA providing 10 W at 50 Ohm. It consumes 1 > A at 12 VDC. I intend to run an over-night WSPR-2 transmission (20% TX > rate) on saturday night, using the ground loop or earth antenna in > JN39WI. The signal generator is a Raspberry Pi running on a separate 7 > Ah lead gel accu. The PA has its own 7 Ah accu. The PA can switch from > 2.5 W to 10 W :-) > > Will someone catch the signal at all? At least i'm already asking for RX > stations! > > I'll carry some measuring equipment there, like my M0BMU LF tuning > meter, some Cs, a T106-2 and some wire, also a small ferrite core to > build a transformer if necessary. > What could the feed point impedance be? I have no idea! My modified > MFJ-259B covers LF but i expect it will be overloaded with strong > signals on the antenna, so i try to match the antenna with the transmitter. > > More soon :-) > > 73, Stefan > > PS: Oh, i'm also going to connect two anti-parallel LEDs to the antenna > to see if they shine. It is all a big game for old children! > > > Am 05.09.2018 23:54, schrieb Roman: > > OK Stefan. > > Try it to do. may be wonderful results. > > > > Roman > > > > > >> Hello Roman, > >> > >> Yes maybe i'll build a quick PA tomorrow for LF and will transmit on LF > >> for 24 hours, each 10 minutes, WSPR-2. I have no idea at all how this > >> antenna performs on 137 kHz. Is it still a loop or rather a dipole or a > >> mixture? At least it has about the length of a full size dipole for 137 > >> kHz. I would TX at 10 W RF power only, so that a small accu covers some > >> hours. But i'm not yet sure if i can find the time to do it tomorrow. > >> > >> 73, Stefan > >> > >> PS: If the antenna acts as a dipole, then it is beaming to Russia > directly. > >> > >> Am 05.09.2018 21:42, schrieb Roman: > >> > >> > >>> Congrts, Stefan! > >>> > >>> We are follow by your success! > >>> Listen, do you planning to operate 136 kHz, I hear, tell me pse - do > you planing try to TX with that ant on 477 kHz and 160M? > >>> I will be interestin to hear about results. > >>> > >>> 73! > >>> Roman > >>> > > --000000000000e371ff05754750a5 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hello Stefan,

thanks for sharing your amazing experiments ! Please inform us about imp= edance measurements data.

My LF receiver is o= nline trying to decode WSPR-15, WSPR-2, OPDS32; we are far but i hope to de= code you in nighttime, QRN permitting.

This i= s the link for WSPR decodes:


The spots are also uploaded t= o wsprnet.org

G= ood luck !

73, Domenico IZ7SLZ


On Fri, 7 Sep = 2018 at 13:51, DK7FC <selberde= nken@posteo.de> wrote:
Genos= se Roman, LF,

Yesterday i built a small LF PA providing 10 W at 50 Ohm. It consumes 1 A at 12 VDC. I intend to run an over-night WSPR-2 transmission (20% TX
rate) on saturday night, using the ground loop or earth antenna in
JN39WI. The signal generator is a Raspberry Pi running on a separate 7
Ah lead gel accu. The PA has its own 7 Ah accu. The PA can switch from
2.5 W to 10 W :-)

Will someone catch the signal at all? At least i'm already asking for R= X
stations!

I'll carry some measuring equipment there, like my M0BMU LF tuning
meter, some Cs, a T106-2 and some wire, also a small ferrite core to
build a transformer if necessary.
What could the feed point impedance be? I have no idea! My modified
MFJ-259B covers LF but i expect it will be overloaded with strong
signals on the antenna, so i try to match the antenna with the transmitter.=

More soon :-)

73, Stefan

PS: Oh, i'm also going to connect two anti-parallel LEDs to the antenna=
to see if they shine. It is all a big game for old children!


Am 05.09.2018 23:54, schrieb Roman:
> OK Stefan.
> Try it to do. may be wonderful results.
>
> Roman
>
>=C2=A0 =C2=A0
>> Hello Roman,
>>
>> Yes maybe i'll build a quick PA tomorrow for LF and will trans= mit on LF
>> for 24 hours, each 10 minutes, WSPR-2. I have no idea at all how t= his
>> antenna performs on 137 kHz. Is it still a loop or rather a dipole= or a
>> mixture? At least it has about the length of a full size dipole fo= r 137
>> kHz. I would TX at 10 W RF power only, so that a small accu covers= some
>> hours. But i'm not yet sure if i can find the time to do it to= morrow.
>>
>> 73, Stefan
>>
>> PS: If the antenna acts as a dipole, then it is beaming to Russia = directly.
>>
>> Am 05.09.2018 21:42, schrieb Roman:
>>
>>=C2=A0 =C2=A0 =C2=A0
>>> Congrts, Stefan!
>>>
>>> We are follow by your success!
>>> Listen, do you planning to operate 136 kHz, I hear, tell me ps= e - do you planing try to TX with that ant on 477 kHz and 160M?
>>> I will be interestin to hear about results.
>>>
>>> 73!
>>> Roman
>>>

--000000000000e371ff05754750a5--