Return-Path: X-Spam-DCC: paranoid 1290; 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=-0.3 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_30_40,HTML_MESSAGE,RATWARE_GECKO_BUILD,SPF_PASS 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 u4D7idZ8023811 for ; Fri, 13 May 2016 09:44:39 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1b17hj-0000pb-G2 for rs_out_1@blacksheep.org; Fri, 13 May 2016 08:40:11 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1b17hj-0000pS-3B for rsgb_lf_group@blacksheep.org; Fri, 13 May 2016 08:40:11 +0100 Received: from elvis.franken.de ([193.175.24.41]) by relay1.thorcom.net with esmtp (Exim 4.87) (envelope-from ) id 1b17hh-0002Js-Dr for rsgb_lf_group@blacksheep.org; Fri, 13 May 2016 08:40:09 +0100 Received: from uucp by elvis.franken.de with local-rmail (Exim 3.36 #1) id 1b17hg-0002zd-00 for rsgb_lf_group@blacksheep.org; Fri, 13 May 2016 09:40:08 +0200 Received: from [192.168.1.117] (r-PC.fritz.box [192.168.1.117]) by mbsks.zwiebeltuete.com (Postfix) with ESMTP id 9A49A12E1A7 for ; Fri, 13 May 2016 09:36:52 +0200 (CEST) To: rsgb_lf_group@blacksheep.org References: <40b8e5c6692149a7911fe77631ebb33b@kabelmail.de> <572BB679.2040107@posteo.de> <572BE449.5010806@abelian.org> <279E0DEFDAFA4C849152DBBA3BFEDE8C@White> <572C5E72.7010404@posteo.de> <912731037.20160506233059@mterrier.net> <572D1111.9030302@posteo.de> <572D9843.7060402@abelian.org> <572DBBD3.3020709@posteo.de> <572DC660.5050007@abelian.org> <572E4BF7.1060103@posteo.de> <572F9120.2010200@abelian.org> <5732F442.2050105@posteo.de> <5732F9E8.1090604@abelian.org> <57343F5D.5030502@posteo.de> <5734D996.8080203@abelian.org> <57351A13.3050802@posteo.de> From: Roland Bruestle Message-ID: <4619df50-a672-49c1-0c7b-5c4e09929e9e@mbsks.franken.de> Date: Fri, 13 May 2016 09:36:54 +0200 User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:45.0) Gecko/20100101 Thunderbird/45.0 MIME-Version: 1.0 In-Reply-To: <57351A13.3050802@posteo.de> X-Scan-Signature: c0e6e8bcdc231effb9da2003d606d9a2 Subject: Re: VLF: EbNaut transmissions on lower frequencies?, pre-tests: 6.47kHz Content-Type: multipart/alternative; boundary="------------BB00240919C6323A4B3298D0" 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 10.1.3.11 Status: O X-Status: X-Keywords: X-UID: 8043 This is a multi-part message in MIME format. --------------BB00240919C6323A4B3298D0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Hello Markus, Stefan, Paul, I'm back at 8170kHz and using now a class D Amplifier. You can see me at Markus Grabber. Amplifier : max. power on 2 Ohm: 500W mac. power on 4 Ohm: 250W Power supply range. 20..48V Switching frequency: 400kHz IC: Texas DTA8950 IC is fan cooled Price, mono mode: Ebay, 50 € My actual values: Power supply: 30V, 3A = 90W PA output about 80W Antenna current: 250mA Temperature of cooler: 37°C Fan mostly switched off For more power I have to increase the voltage of power supply or to lower the primary turns of the transformer. 300Ws should be not a problem. For receiving I wont to use a min whip. I hope that the noise is not to high. 73 Roland DL3NDR --------------BB00240919C6323A4B3298D0 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 8bit Hello Markus, Stefan, Paul,
I'm back at 8170kHz and using now a class D Amplifier. You can see me at Markus Grabber.
Amplifier :
max. power on 2 Ohm: 500W
mac. power on 4 Ohm: 250W
Power supply range. 20..48V
Switching frequency: 400kHz
IC: Texas DTA8950
IC is fan cooled
Price, mono mode: Ebay, 50 €

My actual values:
Power supply: 30V, 3A = 90W
PA output about 80W
Antenna current: 250mA
Temperature of cooler: 37°C
Fan mostly switched off

For more power I have to increase the voltage of power supply or to lower the primary turns of the transformer.
300Ws should be not a problem.

For receiving I wont to use a min whip. I hope that the noise is not to high.

73
Roland DL3NDR
--------------BB00240919C6323A4B3298D0--