Path: ...!weretis.net!feeder8.news.weretis.net!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Cursitor Doom Newsgroups: sci.electronics.repair Subject: Signal Generator Source Impedance Date: Sun, 28 Apr 2024 18:23:13 +0100 Organization: A noiseless patient Spider Lines: 12 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Injection-Date: Sun, 28 Apr 2024 19:23:15 +0200 (CEST) Injection-Info: dont-email.me; posting-host="26cff1648c2a261be1a8853e87698154"; logging-data="1239369"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1/1WrHKjrHLaEzoi+6rJfDDmmKz00F885E=" User-Agent: ForteAgent/8.00.32.1272 Cancel-Lock: sha1:Z11OyO16lMS8Uu8Js0fmzio8VNU= Bytes: 1478 Gentlemen, The service manual for this radio I'm re-aligning states to use an RF signal generator with a source impedance of 60 ohms. I have never heard of such a beast. I have a 50 ohm RF sig gen and a 70 ohm one. I thought that would be all I'd ever need, but now this spanner gets thrown into the works. I'm not having a good day so far! Do I need to make up a suitable impedance transformer, or can I proceed with the 50 or the 70 ohm ones I have, whilst making some allowance for that (and if so, how should that allowance be made?) CD.