> This is an issue with the isolation transformers in the LINE > OUT ports. I've measured similar levels, and shown how they > might be reduced. > http://www.cliftonlaboratories.com/elecraft_k3_receive_audio.htm
Elecraft have changed the series resistors from 604 to 50 Ohms in current production. See the October schematic updates on their web site. I'm assuming a change in the schematics indicates the modification is now "approved." 73, ... Joe, W4TV > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Jack Smith > Sent: Wednesday, November 12, 2008 4:24 PM > To: Alexander Ponomarenko; 'Elecraft' > Subject: Re: [Elecraft] [K3] in-band-IMD test > > > Alex: > > This is an issue with the isolation transformers in the LINE > OUT ports. > I've measured similar levels, and shown how they might be > reduced. > http://www.cliftonlaboratories.com/elecraft_k3_receive_audio.htm > > You will not see the same degree of distortion on the > headphone output > port. > > Jack K8ZOA > > > Alexander Ponomarenko wrote: > > GA for all K3 users. > > So many guys has talks about perfect audio sound of K3. > > So many talks about "analog K3 sound" on e-ham. > > But how it possible if K3 have the so bad in-band IMD? > > You can read about "in-band-IMD-measurements" in russian here: > > > http://forum.cqham.ru/viewtopic.php?t=17119&postdays=0&postorder=asc&&; > > start=0 > > > > Or you can simply look on the pictures, where is in-band > > IMD-measurements of > > SDR-5000, IC-7800, IC-756pro2 and K3 - so bad for HI-FI sound > > announced by many K3-users: > > it's for S9-level http://forum.cqham.ru/download.php?id=31966 > > and it's for S9+50 level http://forum.cqham.ru/download.php?id=32004 > > and even measurements of S/S+N-rate is poor: > > http://forum.cqham.ru/download.php?id=32003 > > > > Alex de UR5LAM > > RU-QRP-C#103 > > K3/100F #0568 _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
