Return-Path: X-Spam-DCC: paranoid 1002; 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=-2.4 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, 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 t9HGF1le021489 for ; Sat, 17 Oct 2015 18:15:01 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ZnU5s-0002D2-UY for rs_out_1@blacksheep.org; Sat, 17 Oct 2015 17:12:28 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ZnU5s-0002Cm-7q for rsgb_lf_group@blacksheep.org; Sat, 17 Oct 2015 17:12:28 +0100 Received: from rgout0402.bt.lon5.cpcloud.co.uk ([65.20.0.215]) by relay1.thorcom.net with esmtp (Exim 4.86) (envelope-from ) id 1ZnU4r-0001SF-Mo for rsgb_lf_group@blacksheep.org; Sat, 17 Oct 2015 17:12:27 +0100 X-OWM-Source-IP: 81.152.57.95 (GB) X-OWM-Env-Sender: ken.h.wright@btinternet.com X-RazorGate-Suspect: true X-CTCH-RefID: str=0001.0A090203.5622731D.0031,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0 X-Junkmail-Premium-Raw: score=54/50,refid=2.7.2:2015.10.14.125417:17:54.983,ip=81.152.57.95,rules=__HAS_FROM, __PHISH_FROM2, __FRAUD_WEBMAIL_FROM, FROM_NAME_ONE_WORD, __TO_MALFORMED_2, __TO_NO_NAME, __REFERENCES, __BOUNCE_CHALLENGE_SUBJ, __BOUNCE_NDR_SUBJ_EXEMPT, __SUBJ_ALPHA_END, __HAS_MSGID, __SANE_MSGID, MSGID_32HEX_LC, INVALID_MSGID_NO_FQDN, __MSGID_32HEX, __MIME_VERSION, __CT, __CTYPE_MULTIPART_ALT, __CTYPE_HAS_BOUNDARY, __CTYPE_MULTIPART, __HAS_X_MAILER, __OUTLOOK_MUA_1, __USER_AGENT_MS_GENERIC, __IN_REP_TO, __ANY_URI, __URI_NO_WWW, __URI_NO_PATH, __SUBJ_ALPHA_NEGATE, __HTML_MSWORD, __URI_IN_BODY, __HTML_BOLD, __HTML_FONT_BLUE, __HAS_HTML, BODYTEXTP_SIZE_3000_LESS, BODYTEXTH_SIZE_10000_LESS, __MIME_HTML, __TAG_EXISTS_HTML, __STYLE_RATWARE_NEG, __RATWARE_SIGNATURE_3_N1, RDNS_GENERIC_POOLED, __URI_NS, SXL_IP_DYNAMIC[95.57.152.81.fur], HTML_70_90, RDNS_SUSP_GENERIC, __PHISH_FROM, __OUTLOOK_MUA, RDNS_SUSP, __FRAUD_WEBMAIL, FORGED_MUA_OUTLOOK, REFERENCES, NO_URI_HTTPS, PHISH_HTML_MSWORD X-CTCH-Spam: Unknown Received: from lindavideo (81.152.57.95) by rgout04.bt.lon5.cpcloud.co.uk (8.6.122.06) (authenticated as ken.h.wright@btinternet.com) id 561CE9040080166B for rsgb_lf_group@blacksheep.org; Sat, 17 Oct 2015 17:10:31 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=btinternet.com; s=btcpcloud; t=1445098247; bh=/1n8hm8BkVfPwj04QDz8zt9Hhp+WSvOeyOdppMck3eE=; h=From:To:References:Subject:Date:Message-ID:MIME-Version:X-Mailer:In-Reply-To; b=vkLqbipNTk1b6OvtjXF6byRX1LgldFmNWm/tbvKm3fDVKZIuJJeulQKdy3sFdzK5O2Ho0idbS7HDx8SGww10VpjP5WKLd/jM5EuOD20kliHoBsDQ1nue5TfXqfqLhB7hidn7PES+4E3IjBt9mSzNsniyFh9XrV0IleGSotuoY2g= From: "Ken" To: References: <08B5A81DD2D14C84874DD10EEB145569@lindavideo> <562270DF.6060606@posteo.de> Date: Sat, 17 Oct 2015 17:11:08 +0100 Message-ID: <4984ACE6DAD948639B45FCDA15692B5B@lindavideo> MIME-Version: 1.0 X-Mailer: Microsoft Office Outlook 11 In-Reply-To: <562270DF.6060606@posteo.de> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 Thread-Index: AdEI9XOaU1OcpqfbQtiYZG6cXPR/qQAAKfjg X-Scan-Signature: 7117f452ff11af9bac782a916713f0d7 Subject: RE: LF: TX Toroid Material Content-Type: multipart/alternative; boundary="----=_NextPart_000_0039_01D108FE.D0EA81C0" 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: 4437 This is a multi-part message in MIME format. ------=_NextPart_000_0039_01D108FE.D0EA81C0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Hi Stfan. I have been looking at the 77 type material, but waiting for other group members opinion. 73 Ken _____ From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of DK7FC Sent: 17 October 2015 17:02 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: TX Toroid Material PS: For the RF transformers i often use N30 ferrite material with good results. An AL of 4000 nH or above is a good choice. If you want to use Amidon ferrite cores, use type 77 material (available on most distributors). 73 Am 17.10.2015 17:41, schrieb Ken: Dear All. I am having problems with the choice of material for the output network of the 475kHz Valve TX. The network is an L - C - L, 'T' network with an input impedance of 2100 ohms and a load of 50 ohms, for this configuration the input L is 7.7mH, shunt capacitance is 117pf, and output L is 1.1mH. The PA design using a 6146 low power or 813 high power work fine when simulated using LT spice IV. When testing in the real world using the 6146 there is in excess of 800v rms rf on the network side of the anode coupling capacitor, but nothing after the input L. I can only conclude that I using the wrong type material for the toroids, I used the largest size (unmarked) toroid which gave me a modest number of turns. I have checked the Amidon tables and Iron Powder because of the low AL values, which leaves Ferrite, which mix would you recommend? The simulations give me output powers 90W for the 6146, and 300W for the 813. I would be grateful for any core material advice . Ken Wright. M0KHW ------=_NextPart_000_0039_01D108FE.D0EA81C0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi = Stfan.

I have been looking at the 77 type material, but waiting for other group members = opinion.

 

73

 

Ken

 

From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of DK7FC
Sent: 17 October 2015 = 17:02
To: = rsgb_lf_group@blacksheep.org
Subject: Re: LF: TX = Toroid Material

 

PS: For the RF transformers i often use N30 = ferrite material with good results. An AL of 4000 nH or above is a good choice. If you want to use Amidon ferrite = cores, use type 77 material (available on most distributors).
73

Am 17.10.2015 17:41, schrieb Ken:

Dear All. I am having problems with the choice of material for the output = network of the 475kHz Valve TX. The network is an L – C – L, ‘T’ network with an = input impedance of 2100 ohms and a load of 50 ohms, for this configuration the = input L is 7.7mH, shunt capacitance is 117pf, and output L is 1.1mH. The PA = design using a 6146 low power or 813 high power work fine when simulated using = LT spice IV. When testing in the real world using the 6146 there is in = excess of 800v rms rf on the network side of the anode coupling capacitor, but = nothing after the input L. I can only conclude that I using the wrong type = material for the toroids, I used the largest size (unmarked) toroid which gave me a = modest number of turns. I have checked the Amidon tables and Iron Powder = because of the low AL= values, which leaves Ferrite, which mix would you recommend? The = simulations give me output powers 90W for the 6146, and 300W for the 813. I would be grateful for any core material advice = .

 

Ken = Wright.

M0KHW

 

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