Return-Path: X-Spam-DCC: paranoid 1233; 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=-1.7 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_RCVD_HELO,HTML_40_50,HTML_MESSAGE 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 t9IK3hjl024700 for ; Sun, 18 Oct 2015 22:03:43 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Znu8m-0002jr-LE for rs_out_1@blacksheep.org; Sun, 18 Oct 2015 21:01:12 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Znu8m-0002ji-Ax for rsgb_lf_group@blacksheep.org; Sun, 18 Oct 2015 21:01:12 +0100 Received: from s16315160.onlinehome-server.info ([87.106.80.234] helo=mail.vigilant.es) by relay1.thorcom.net with esmtp (Exim 4.86) (envelope-from ) id 1Znu7i-0006DS-Ih for rsgb_lf_group@blacksheep.org; Sun, 18 Oct 2015 21:01:11 +0100 Received: from servigilant.vigilant.local ([87.216.178.132]) by vigilant.es with MailEnable ESMTP; Sun, 18 Oct 2015 21:59:35 +0200 Received: from servigilant.vigilant.local ([fe80::3cdf:95f8:c1c9:3931]) by servigilant.vigilant.local ([fe80::3cdf:95f8:c1c9:3931%13]) with mapi id 14.03.0123.003; Sun, 18 Oct 2015 21:59:35 +0200 From: =?iso-8859-1?Q?VIGILANT_Luis_Fern=E1ndez?= To: "rsgb_lf_group@blacksheep.org" Thread-Topic: LF: EA5DOM going vertical Thread-Index: AQHRCGG9wFizgMH7ikaxIJNDTXOPZp5vUyMAgABqEsv///hggIAAkkeG///ppACAAXeRGA== Date: Sun, 18 Oct 2015 19:59:34 +0000 Message-ID: <579355A36AEE9D4FA555C45D556003AB1B2285A7@servigilant.vigilant.local> References: <579355A36AEE9D4FA555C45D556003AB1B227339@servigilant.vigilant.local>,<56221C58.8010200@posteo.de> <579355A36AEE9D4FA555C45D556003AB1B227788@servigilant.vigilant.local>,<56226EED.7020302@posteo.de> <579355A36AEE9D4FA555C45D556003AB1B227D52@servigilant.vigilant.local>,<5622D6E0.5000402@posteo.de> In-Reply-To: <5622D6E0.5000402@posteo.de> Accept-Language: es-ES, en-US Content-Language: es-ES X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [95.17.130.205] MIME-Version: 1.0 X-Scan-Signature: fbdd513523001863775249cfaf215eac Subject: Re: LF: EA5DOM going vertical Content-Type: multipart/alternative; boundary="_000_579355A36AEE9D4FA555C45D556003AB1B2285A7servigilantvigi_" 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: 4490 --_000_579355A36AEE9D4FA555C45D556003AB1B2285A7servigilantvigi_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Stefan >>The output transformer inside the PA or do you have an external one? The PA uses one between FET and output filter. Actually the vertical is dir= ectly connected to the PA output. No matching transformer and no loading coil. It was a cra= zy test but works ...... >BTW i recommend to use separate primary and secondary windings on the tran= sformer to decouple >the system. This also helps to avoid QRM/TVI to others= . A correctly wound transformer is cold, even >at 100W passing through it. = Otherwise it saturates! Then you need more turns on the primary side! >This= is a first thing that you could check by winding a 1:1 transformer and see= if it stays cool when >running full power into a dummy load for a few minu= tes. >I guess your loss resistance could be in the range of 50 Ohm, so you may n= eed a 1:1.4 winding ratio. >You will see... For the transformer I plan to recycle the one osed for the loop. It has two= big toroids 80mm external diameter and 8mm thick. Both joined make 16mm thick. Unfortunately don't know which = is the material used Can be primary and secondary be wounded one on top of the other ?? or is be= tter to keep them apart I think there is enought place to make them separated in the ferrite ring Good idea to test a 1:1 into a dummy load. I'll do that :-) Tonight reports on my remote monitor are 3dB down. I made a modification I have finally connected a wire from top terrace to the fire extinguish pip= e which runs inside the building down to the basements, were pumping system is located. The wire is not yet conne= cted to the ground side of the vertical BUT the actual radial counterpoise runs parallel to this wire for about 5m Seems like this can be the cause of 3dB looses. Keep tuned ! 73 de Luis EA5DOM --_000_579355A36AEE9D4FA555C45D556003AB1B2285A7servigilantvigi_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi Stefan

>>The output transformer inside= the PA or do you have an external one?

The PA uses one between FET and outpu= t filter. Actually the vertical is directly connected
to the PA output. No matching transfo= rmer and no loading coil. It was a crazy test
but works ......

>BTW i recommend to use separate p= rimary and secondary windings on the transformer to decouple >the system= . This also helps to avoid QRM/TVI to others. A correctly wound transformer= is cold, even >at 100W passing through it. Otherwise it saturates! Then you need more turns on the primary side! = >This is a first thing that you could check by winding a 1:1 transformer= and see if it stays cool when >running full power into a dummy load for= a few minutes.
>I guess your loss resistance could be = in the range of 50 Ohm, so you may need a 1:1.4 winding ratio. =
>You will see...

For the transformer I plan to recycle = the one osed for the loop. It has two big toroids 80mm external diameter
and 8mm thick. Both joined make 16mm t= hick. Unfortunately don't know which is the material used

Can be primary and secondary be wounde= d one on top of the other ?? or is better to keep them apart
I think there is enought place to make= them separated in the ferrite ring

Good idea to test a 1:1 into a dummy l= oad. I'll do that :-)

Tonight reports on my remote monitor a= re 3dB down. I made a modification
I have finally connected a wire from t= op terrace to the fire extinguish pipe which runs inside the building down<= /font>
to the basements, were pumping system = is located. The wire is not yet connected to the ground side of the vertica= l
BUT the actual radial counterpoise run= s parallel to this wire for about 5m

Seems like this can be the cause of 3d= B looses.  Keep tuned ! 

73 de Luis
EA5DOM
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