Muriel I don't know about your spectrum analyser but loudspeaker impedace ratings are very "nominal". Over the audio bandwidth (say 20Hz to 20kHz) the impedance of an "8ohm" speaker can vary from as much as 16ohms to as little as 0.5ohms. It makes the safety requirement of rating an audio amplifer's mimimum rated load capacity as a little meaningless.
Regards Chris Colgan EMC & Safety TAG McLaren Audio Ltd mailto:chris.col...@tagmclarenaudio.com > -----Original Message----- > From: Muriel Bittencourt de Liz [SMTP:mur...@grucad.ufsc.br] > Sent: 12 November 1999 21:52 > To: david_l_tarnow...@email.whirlpool.com > Cc: Lista de EMC da IEEE > Subject: Re: 60 Hz Power Line Impedance > > > Group and Mr. Tarnowski, > > I don't know the answer for this question, but it lead me to other doubt > I have... > > When read in my Receiver/Spectrum Analyzer: 50 Ohms, what is the > frequency range on which this impedance is valid? This question also > applies to impedance of loudspeakers (generally 8 or 4 ohms)?? > > And the impedance of my network? How do I determine? > > Thanks in advance for those who answer... > > Good Weekend!! > > Muriel > > david_l_tarnow...@email.whirlpool.com wrote: > > > > > > Fellow Networkers; > > > > Does there exist information about the impedance (at 60 Hz) of > typical > > power line networks here in the US? > > > > In Europe, I know they use a specified reference impedance (at 50 > Hz) > > for flicker testing, which is (0.24 + j0.15) Ohm for line and (0.16 > + > > j0.10) Ohms. This represents, I understand, the European public > > network impedance as seen at the point of "common coupling" (i.e., > > connection to the homes service entrance). > > > > David Tarnowski > > Whirlpool Corporation > > Global Laundry Controls > > St. Joseph, MI > > > > > > --------- > > This message is coming from the emc-pstc discussion list. > > To cancel your subscription, send mail to majord...@ieee.org > > with the single line: "unsubscribe emc-pstc" (without the > > quotes). For help, send mail to ed.pr...@cubic.com, > > jim_bac...@monarch.com, ri...@sdd.hp.com, or > > roger.volgst...@compaq.com (the list administrators). > > -- > ====================================================================== > Muriel Bittencourt de Liz > GRUCAD - Group for Conception & Analysis of Electromagnetic Devices > Santa Catarina Federal University - UFSC > PO Box: 476 ZIP: 88040-900 - Florianópolis - SC - BRAZIL > Phone: +55.48.331.9649 - Fax: +55.48.234.3790 > e-mail: mur...@grucad.ufsc.br > ICQ#: 9089332 > Alternativa Adreso: mur...@esperanto.nu > > --------- > This message is coming from the emc-pstc discussion list. > To cancel your subscription, send mail to majord...@ieee.org > with the single line: "unsubscribe emc-pstc" (without the > quotes). For help, send mail to ed.pr...@cubic.com, > jim_bac...@monarch.com, ri...@sdd.hp.com, or > roger.volgst...@compaq.com (the list administrators). > ===================================================== Authorised on 11/15/99 at 12:09:43; code 37f48bf3670E8D3C. The contents of this E-mail are confidential and for the exclusive use of the intended recipient. If you receive this E-mail in error, please delete it from your system immediately and notify us either by E-mail, telephone or fax. You should not copy, forward or otherwise disclose the content of the E-mail. TAG McLaren Audio Ltd, The Summit, 11 Latham Road Huntingdon, Cambs, PE18 6ZU Telephone : 01480 415600 (+44 1480 415600) Facsimile : 01480 52159 (+44 1480 52159) --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
