I have K3 envy but use an Orion and, as with Van, I have an FT2000 and am a member of that reflector. Until a death-by-lightning incident I also had an FT1000MP. One of the frequently heard complaints on the 2000 and sometimes the Orion reflector is that the Orion is noisy compared to either an MP or 2K. I don't find that to be the case unless I am using too much RF gain with the Orion but quite a few others dont agree. I recall that in early runs of the MP there were many complaints about audio hiss, and InRad had a fix which was a simple audio BW roll-off cap. I suspect Yaesu may have included a similar change in later MP's and MKV's as those complaints stopped. The idea was to eliminate any white noise in the phones when the antenna input was disconnected. That noise was coming from an audio stage. I am very interested in seeing where the K3 noise thread leads.
73 Bob W2WG -----Original Message----- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jan Erik Holm Sent: Saturday, December 19, 2009 10:12 AM Cc: Elecraft List Subject: Re: [Elecraft] Noisy K3 receiver Well something isn´t right or different from other radios. There are radios with lower MDS that sounds much quieter then the K3. Here we have proposals to turn of preamp and make MDS even higher. Not logical and state of the art to me. So again, I know there are receivers with lower MDS then the K3 that sounds much more quiet. IMO something is going on but I can´t put my fingers on it and I don´t have the time to investigate. And believe you me with the experience I do have in the performance of a multitude of different radios going back in to the 60´ties I know what I´m talking about. It´s been most interesting to read some of the comments, maybe something can come out of it and things can be fixed. merry xmas Jim SM2EKM ----------------------------- Don Wilhelm wrote: > will return the K3 to full gain. You are correct in reducing the RF > Gain to the point where the band noise is reduced. I trust you are also > using the attenuator and have the preamp off because these are stages > prior to the mixer and will have a greater impact on the band noise > reduction than the RF Gain which operates at the IF. > > For those who have noisy reception, do a trial at a spot in each HF band > where there are no signals present - first turn off the preamp, and then > if noise is still present and bothersome, turn on the attenuator, then > lastly reduce the RF Gain. > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
