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<www.repeater-builder.com/measuring-sensitivity/measuring-sensitivity.html> <www.repeater-builder.com/tech-info/receiversensitivity.html> 73, Eric Lemmon WB6FLY -----Original Message----- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Tim Sawyer Sent: Monday, September 06, 2010 4:00 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Micor UHF Sensivity I have tried with 3 volt meters and 2 SINAD meters: a Fluke 77, a "Sinadder 3" (SINAD & AC voltmeter) and a HP8924c. Pretty much same results with all. That is 20 db quieting around 0.7 uV, SINAD around 0.35. So what's the recommended meter? Should I trust the SINAD reading and chock the quieting reading up some unknown meter problems? Yes, measuring on the speaker terminals with no speaker. The Sinadder and 8924c have internal speakers but I suspect they are not loading the receiver. Yes. The Micor came with a 3 page document detailing SP71 modifications. Would you like me to scan and email you a copy? -- Tim :wq On Sep 6, 2010, at 3:30 PM, Jeff DePolo wrote: Not all voltmeters behave the same with complex AC waveforms (such as noise). Some of my Flukes are inaccurate at higher AC frequencies (like above a few hundred Hz) - and they're spec'ed that way. What kind of meter are you using, and where are you measuring (speaker terminals is where you should be measuring from)? Do you know what, exactly, the SP features/modifications are on your SP Micor? --- Jeff WN3A
