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Sender: "piclist-bounces@mit.edu" Date: Thu, 26 Nov 2020 08:47:39 -0800 Subject: Re: [OT] Hyperikon Retrofit LED Tubes Without Ballast and fluorescent lamps and TV! Thread-Topic: [OT] Hyperikon Retrofit LED Tubes Without Ballast and fluorescent lamps and TV! Thread-Index: AdbEFT/Rjm+ZSXHaQImomlDIe9oKgQ== Message-ID: References: <20201125221458.06a56fd6300ec2bfca6379d4e10ab8d2.7f57746529.wbe@email27.godaddy.com> <1606387072@dtweed.com> List-Help: List-Subscribe: , List-Unsubscribe: , In-Reply-To: <1606387072@dtweed.com> Reply-To: Microcontroller discussion list - Public. Accept-Language: en-US X-MS-Exchange-Organization-AuthAs: Anonymous X-MS-Exchange-Organization-AuthSource: TS500.efplus4.local X-MS-Has-Attach: X-Auto-Response-Suppress: All X-MS-Exchange-Organization-SenderIdResult: Pass X-MS-Exchange-Organization-PRD: mit.edu X-MS-TNEF-Correlator: received-spf: Pass (protection.outlook.com: domain of mai.hallikainen.org designates 208.80.15.114 as permitted sender) receiver=protection.outlook.com; client-ip=208.80.15.114; helo=mailscanner.virtbiz.com; dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mitprod.onmicrosoft.com; s=selector2-mitprod-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=vgCc4Ngtd+HUTNRSAmXwQhHJ9UnHrVNr/jPEf3HyQxc=; b=SVaYfJz0Oo1R+88sG4CgxbpwnAvJqGbPJRuEIV+m8G533RrRRbuWW25S3VXebgbfY/VWC22EcbExstiQmn0rquDP8kt6JRyxvF4hGa73U/cldkq/JM8xs+fCJpwn9746Rv7fB6w8YYOBPnA1JXfITUXb51jImzJ1feOd5vl9yOY= authentication-results: spf=pass (sender IP is 208.80.15.114) smtp.mailfrom=mai.hallikainen.org; mit.edu; dkim=none (message not signed) header.d=none;mit.edu; dmarc=permerror action=none header.from=mai.hallikainen.org; user-agent: SquirrelMail/1.4.22-5.el6 errors-to: piclist-bounces@mit.edu list-id: "Microcontroller discussion list - Public." list-post: x-beenthere: piclist@mit.edu x-mailman-version: 2.1.6 x-authentication-warning: mai.hallikainen.org: apache set sender to harold@mai.hallikainen.org using -f x-spam-status: No x-greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mailscanner.virtbiz.com [208.77.216.252]); Thu, 26 Nov 2020 10:47:42 -0600 (CST) x-topics: [OT] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 >> NTSC television is interesting! It's described at >> http://mai.hallikainen.org/org/FCC/FccRules/2021/73/682/ . Prior to >> color, >> the field rate was indeed 60 Hz, the power line frequency, to avoid >> rolling "hum bars." With color, it appears everything is based on a >> precise 5 MHz with the chroma subcarrier being 5 MHz * 68/88. > > That would be 3.863636 MHz, not even close to the correct value. > Oops! Typo. Copied from cited FCC rule, it's 63/88 * 5 MHz. Also, thanks for clarification on PAL. I had only read about it and had no experience with it. Harold https://w6iwi.org --=20 FCC Rules Updated Daily at http://www.hallikainen.com Not sent from an iPhone. --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .