Erik you're correct. The table below shows the FT-1000MP (not "D" but I bet very similar) has a nonlinear response in the low range of the meter. Most rigs (other than the K3 and Flex 5000) have the identical problem.
http://www.seed-solutions.com/gregordy/Amateur%20Radio/Experimentation/SMeterBlues.htm 73, Bill K7TV wrote: > > Jim, > > I take it you were commenting on the S-meter. I don't have the rig > anymore; > I sold it to buy the K3. It was generally working very well, and it > behaved > this way from day one (I bought it new around 1992) and I never saw a need > to align it. The buyer has not complained. My statement was based on > starting at S-9 and applying attenuation 6 dB at a time. My memory may be > slightly off, but generally I saw the same behavior in the 1000D as in my > old IC-735. The meters would be quite good above S-7. Starting at S-7 and > attenuating another 6 dB they would indicate about S-5, and after another > 6 > dB the needle would be at 0. I remember memorizing this and using it to > give > reports. Because it seemed so consistent between the two rigs, I formed > the > opinion that it was the consensus of the manufacturers, and again saw no > reason to question the 1000D's alignment. Of course, with preamplification > on, the meter would start moving at a lower level, maybe S3. Over the > years > I have seen comments in articles that have seemed to avoid generalizations > and instead said things like "S-meter calibrations vary a lot from > receiver > to receiver". I wouldn't be surprised if Yaesu had changed the AGC > parameters sometime during the long production run. > > 73, > Erik K7TV > > ----- Original Message ----- > From: "Jan Erik Holm" <[email protected]> > Cc: <[email protected]> > Sent: Monday, May 11, 2009 8:25 PM > Subject: Re: [Elecraft] K3 Power supply > > >> Sorry but this is totally wrong. In this case your FT-1000D >> was either broken or not aligned properly. >> If you still have it align it per the service manual and >> you will see something totally different. >> >> 73 Jim SM2EKM >> ------------------------------ >> Erik N Basilier wrote: >>> Merv, >>> >>> My experience with the FT-1000D was that the S-meter didn't start to >>> move >>> until the actual signal strength reached S-5 or so. But yes, I believe >>> you >>> when you say that the switching power supply creates a lot of noise, and >>> the >>> one in the FT-1000D doesn't. >>> >>> 73, >>> Erik K7TV >>> >> >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[email protected] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > -- View this message in context: http://n2.nabble.com/K3%3A-N1MM-for-Field-Day-tp2864853p2868603.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
