Return-Path: Received: from rly-dc08.mx.aol.com (rly-dc08.mail.aol.com [172.19.136.37]) by air-dc09.mail.aol.com (v126.13) with ESMTP id MAILINDC094-b3b4b194a3a41; Fri, 04 Dec 2009 12:43:39 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-dc08.mx.aol.com (v125.7) with ESMTP id MAILRELAYINDC087-b3b4b194a3a41; Fri, 04 Dec 2009 12:43:23 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NGcAe-0000Sz-V7 for rs_out_1@blacksheep.org; Fri, 04 Dec 2009 17:42:20 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NGcAe-0000Sq-Em for rsgb_lf_group@blacksheep.org; Fri, 04 Dec 2009 17:42:20 +0000 Received: from lnx503.hrz.tu-darmstadt.de ([130.83.156.232]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1NGcAd-000604-JZ for rsgb_lf_group@blacksheep.org; Fri, 04 Dec 2009 17:42:20 +0000 Received: from FILE-SERVER-HST.hst.e-technik.tu-darmstadt.de (File-Server-HST.hst.e-technik.tu-darmstadt.de [130.83.212.129]) by lnx503.hrz.tu-darmstadt.de (8.14.2/8.14.2/HRZ/PMX) with SMTP id nB4HgGAQ016242 for ; Fri, 4 Dec 2009 18:42:16 +0100 (envelope-from schaefer@hst.tu-darmstadt.de) Received: from [127.0.0.1] (helo=File-Server-HST.hst.e-technik.tu-darmstadt.de) by FILE-SERVER-HST.hst.e-technik.tu-darmstadt.de with AVK MailGateway; for ; Fri, 04 Dec 2009 18:42:16 +0100 Content-class: urn:content-classes:message MIME-Version: 1.0 X-MimeOLE: Produced By Microsoft Exchange V6.5 Date: Fri, 4 Dec 2009 18:42:15 +0100 Message-ID: <38A51B74B884D74083D7950AD0DD85E828AB49@File-Server-HST.hst.e-technik.tu-darmstadt.de> In-Reply-To: <000a01ca74ff$163eb010$0401a8c0@xphd97xgq27nyf> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: FUSE TEST Thread-Index: Acp0/+yNaiqZzgGlSBCmQsvim/kdtQAB9XZQ From: =?iso-8859-1?Q?Stefan_Sch=E4fer?= To: X-AVK-Virus-Check: AVB 19.605;04.12.2009 X-PMX-TU: seen v0.99a by 5.5.8.383112, Antispam-Engine: 2.7.2.376379, Antispam-Data: 2009.12.4.172718 X-PMX-SPAMCHECK: outgoing mail X-Karma: unknown: X-Spam-Score: 1.2 (+) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,SUBJ_ALL_CAPS=1.166 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01CA7509.1EB5C3F9" Subject: LF: AW: FUSE TEST 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_60_70, HTML_FONTCOLOR_UNKNOWN,HTML_MESSAGE,SUBJ_ALL_CAPS 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 X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) ------_=_NextPart_001_01CA7509.1EB5C3F9 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi mal,=20 =20 There is also a dependence of time. I am sure you can put 1000A to a 10A= Fuse, when time is short enough. I adiabatic cases it is a function of th= e thermal capacity of the fuse, the fuse wire volume and the melting point= of the fuse wire. Therefore they are separated into fast, medium, slow.= If you use a fast or super fast fuse, a 30A fuse will melt at 50A within= a few seconds or earlier. =20 73, Stefan =20 =20 PS: I just have finished my receiving loop with 40 windings, repaired the= converter and integrated it into my K2. Now I will watch the argo screen= tonight and hope for some signs. It becomes better and better :-) =20 Gl es dx dx! =20 =20 -----Urspr=FCngliche Nachricht----- Von: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacks= heep.org] Im Auftrag von mal hamilton Gesendet: Freitag, 4. Dezember 2009 17:30 An: rsgb Betreff: LF: FUSE TEST =20 Has anyone tested the ACTUAL blow current for fuses eg 5A 10A 30A.. I often do not have fuses at the correct value and FUSE down only to find= that I can run them at considerably higher amps than rated eg 30A fuses= at 50A and they fail to blow. This is intermittent use say 30% - 50% in= psu's used for CW and QRS3 normally in FET AMPS This is normal fuse wire bought wrapped on card. It looks like your PA fets could be in trouble under certain circumstances= . =20 de mal/g3kev =20 =20 =20 =20 ------_=_NextPart_001_01CA7509.1EB5C3F9 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi mal,

 <= /p>

There is= also a dependence of time. I am sure you can put 1000A to a 10A Fuse, when time= is short enough. I adiabatic cases it is a function of the thermal capacity= of the fuse, the fuse wire volume and the melting point of the fuse wire. Therefo= re they are separated into fast, medium, slow. If you use a fast or super fas= t fuse, a 30A fuse will melt at 50A within a few seconds or earlier.<= /font>

 

73, Stef= an

 

 

PS: I ju= st have finished my receiving loop with 40 windings, repaired the converter and integrated it= into my K2. Now I will watch the arg= o screen tonight and hope for some signs. It becomes better and better J

 

Gl es dx= dx!

 

 

-----Urspr=FCngl= iche Nachricht-----
Von: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.= org] Im Auftrag von mal ha= milton
Gesendet: Freitag, 4. Dezem= ber 2009 17:30
An: rsgb
Betreff: LF: FUSE TEST

 

Has anyone tested= the ACTUAL blow current for fuses eg 5A 10A 30A..

I often do not hav= e fuses at the correct value and FUSE down only to find that I can run them at considerab= ly higher amps than rated eg 30A fuses at 50A and they fail to blow. This is intermittent use say 30% - 50% in psu's used for CW and QRS3 normally in= FET AMPS

This is normal fus= e wire bought wrapped on card.

It looks like your= PA fets could be in trouble under certain circumstances.

 

de mal/g3kev

 

 

 

 

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