Return-Path: X-Spam-DCC: paranoid 104; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.7 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_MESSAGE,RATWARE_GECKO_BUILD autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id t8UBUfrh012051 for ; Wed, 30 Sep 2015 13:30:41 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ZhFWj-0003ua-C0 for rs_out_1@blacksheep.org; Wed, 30 Sep 2015 12:26:25 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ZhFWi-0003uR-Vy for rsgb_lf_group@blacksheep.org; Wed, 30 Sep 2015 12:26:24 +0100 Received: from mout01.posteo.de ([185.67.36.65]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.86) (envelope-from ) id 1ZhFVm-0008EQ-OZ for rsgb_lf_group@blacksheep.org; Wed, 30 Sep 2015 12:26:23 +0100 Received: from dovecot03.posteo.de (dovecot03.posteo.de [172.16.0.13]) by mout01.posteo.de (Postfix) with ESMTPS id 7CAEB2089C for ; Wed, 30 Sep 2015 13:25:09 +0200 (CEST) Received: from mail.posteo.de (localhost [127.0.0.1]) by dovecot03.posteo.de (Postfix) with ESMTPSA id 3nQwH90j3Bz5vMJ for ; Wed, 30 Sep 2015 13:25:08 +0200 (CEST) Message-ID: <560BC694.8010202@posteo.de> Date: Wed, 30 Sep 2015 13:25:08 +0200 From: DK7FC User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <579355A36AEE9D4FA555C45D556003AB1B2150ED@servigilant.vigilant.local> In-Reply-To: <579355A36AEE9D4FA555C45D556003AB1B2150ED@servigilant.vigilant.local> X-Scan-Signature: 14522a7d8bfffcae5e92e35059f18ae1 Subject: Re: LF: Re: 23:35 477 EA5DOM de EB3FRN Op8 Deep Search -36 dB1489.0 Hz Content-Type: multipart/alternative; boundary="------------060106000401030005050405" 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-Scanned-By: MIMEDefang 2.56 on 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 4223 This is a multi-part message in MIME format. --------------060106000401030005050405 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit Hi Luis. What is the loop RF current and the loop area? Do you know it? Is it problematic to match the loop? You just need a C and a ferrite transformer. If you have such a relatively high perimeter, you probably need about 1 nF to resonate it? Currents may be in the range of 10A at 100W? A bandwidth of maybe 3 kHz? 73, Stefan Am 30.09.2015 11:14, schrieb VIGILANT Luis Fernández: > Hi MF > Probably not 2mW ERP Stefan ;-) > Have to reconfigure my U3 but really don't know which ERP I'm getting > right now > The PA outputs 60V RMS under 50Ohm load, but the loop is not an ideal > load and I can tune it > to about 80V RMS. When detuned, RMS runs up to >>100V and PA gets into > problems > I tried to get loop performance using Andy G4JNT excel and this is > what I got > https://dl.dropboxusercontent.com/u/7162072/Fotos%20varias/MF/70m%20MF%20Loop%20at%20100W%20.png > Probably many things wrong there > What I use is a 70m perimeter loop made from RG59 coax (braid and > inner shorted on ends) but not a round circle > The resonate cap is very close to what I need to tuneit. So the > "equivalent" round loop diameter should be 21m > Go figure ! :-) > One detail to mention: > Yesterday, it rained. Not very usual here and still not tested the > loop with this Tx power and with wet terrace > It seems to me that my signals was better than before. Could the wet > terrace worked as a kind of reflector or > re-shapped the radiation diagram of the horizontal loop making it more > efficient for Dx ?? > The loop is not equidistant from terrace but keeps about 3 to 4 meter > high, and just 1m on the feeding point > 73 de Luis > EA5DOM > > ------------------------------------------------------------------------ > *De:* owner-rsgb_lf_group@blacksheep.org > [mailto:owner-rsgb_lf_group@blacksheep.org] *En nombre de *DK7FC > *Enviado el:* miércoles, 30 de septiembre de 2015 10:18 > *Para:* rsgb_lf_group@blacksheep.org > *Asunto:* Re: LF: Re: 23:35 477 EA5DOM de EB3FRN Op8 Deep Search -36 > dB1489.0 Hz > > Hi Luis, > > Ooh, very well! I'm glad that i received you the first time! Is it > really 2 mW ERP? > Oh and BTW it was in WSPR, the super mode!!!! ;-) > > 73, Stefan > > Am 30.09.2015 00:17, schrieb VIGILANT Luis Fernández: >> Even with the loop we are on the way ;-) >> >> 2015-09-29 22:00 EA5DOM 0.475611 -27 0 IM98wn 0.002 >> DK7FC/P JN49ik 1398 27 >> >> >> 73 de Luis >> EA5DOM >> ------------------------------------------------------------------------ >> *De:* owner-rsgb_lf_group@blacksheep.org >> [owner-rsgb_lf_group@blacksheep.org] en nombre de DK7FC >> [selberdenken@posteo.de] >> *Enviado:* lunes, 28 de septiembre de 2015 21:47 >> *Para:* rsgb_lf_group@blacksheep.org >> *Asunto:* Re: LF: Re: 23:35 477 EA5DOM de EB3FRN Op8 Deep Search -36 >> dB1489.0 Hz >> >> >> Am 28.09.2015 17:02, schrieb VIGILANT Luis Fernández: >>> [...] >>> Next in the list is going vertical. Coil and variometer on the way. >>> Keep tuned ;-) >>> 73 de Luis >>> EA5DOM >>> >> >> Oh yes! Do it!!! :-) Looking forward to a QSO :-) >> >> 73, Stefan --------------060106000401030005050405 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Hi Luis.

What is the loop RF current and the loop area? Do you know it?
Is it problematic to match the loop? You just need a C and a ferrite transformer. If you have such a relatively high perimeter, you probably need about 1 nF to resonate it? Currents may be in the range of 10A at 100W? A bandwidth of maybe 3 kHz?

73, Stefan

Am 30.09.2015 11:14, schrieb VIGILANT Luis Fernández:
Hi MF
 
Probably not 2mW ERP Stefan ;-)
 
Have to reconfigure my U3 but really don't know which ERP I'm getting right now
The PA outputs 60V RMS under 50Ohm load, but the loop is not an ideal load and I can tune it
to about 80V RMS. When detuned, RMS runs up to >>100V and PA gets into problems
 
I tried to get loop performance using Andy G4JNT excel and this is what I got
 
Probably many things wrong there
What I use is a 70m perimeter loop made from RG59 coax (braid and inner shorted on ends) but not a round circle
The resonate cap is very close to what I need to tuneit. So the "equivalent" round loop diameter should be 21m 
Go figure ! :-)
 
One detail to mention:
Yesterday, it rained. Not very usual here and still not tested the loop with this Tx power and with wet terrace
It seems to me that my signals was better than before. Could the wet terrace worked as a kind of reflector or
re-shapped the radiation diagram of the horizontal loop making it more efficient for Dx ??
 
The loop is not equidistant from terrace but keeps about 3 to 4 meter high, and just 1m on the feeding point
 
73 de Luis
EA5DOM

De: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] En nombre de DK7FC
Enviado el: miércoles, 30 de septiembre de 2015 10:18
Para: rsgb_lf_group@blacksheep.org
Asunto: Re: LF: Re: 23:35 477 EA5DOM de EB3FRN Op8 Deep Search -36 dB1489.0 Hz

Hi Luis,

Ooh, very well! I'm glad that i received you the first time! Is it really 2 mW ERP?
Oh and BTW it was in WSPR, the super mode!!!! ;-)

73, Stefan

Am 30.09.2015 00:17, schrieb VIGILANT Luis Fernández:
Even with the loop we are on the way ;-)

 2015-09-29 22:00   EA5DOM   0.475611   -27   0   IM98wn   0.002   DK7FC/P   JN49ik   1398   27 

73 de Luis
EA5DOM
De: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.org] en nombre de DK7FC [selberdenken@posteo.de]
Enviado: lunes, 28 de septiembre de 2015 21:47
Para: rsgb_lf_group@blacksheep.org
Asunto: Re: LF: Re: 23:35 477 EA5DOM de EB3FRN Op8 Deep Search -36 dB1489.0 Hz


Am 28.09.2015 17:02, schrieb VIGILANT Luis Fernández:
[...]
 
Next in the list is going vertical. Coil and variometer on the way. Keep tuned ;-)
 
73 de Luis
EA5DOM


Oh yes! Do it!!! :-) Looking forward to a QSO :-)

73, Stefan
--------------060106000401030005050405--