Jim, that prompted me to fire up the sig gen and have a look. On all HF bands I found that with an S9 +30 sig the opposite sideband is around 55db down, i.e. around S3-4. With an S9 sig it is barley audible and it takes an S9+15 (approx) for the opposite sideband to register on the S meter. The settings were PRE (20db) = on, B/W 250Hz, XFIL=FL3. I did not get the the 50Hz sigs that you found. Could that have been front end overload? I use mostly CW and have not found any of this to be a problem. Colin - G8FRA/M5FRA m5fra.org.uk < http://www.m5fra.org.uk>
------ Original Message ------ From: [email protected] To: [email protected];[email protected];[email protected] Sent: 09/10/2012 13:48:23 Subject: Re: [Elecraft] KX3 Filter Blow-By >I did some more careful checking this morning, transmitting a few >watts on >the FT-1000MP and using a couple of inches of wire as an antenna on >the >KX3, on a quiet 10 meter band. The S-meter on the KX3 was 9+ > >There is noticeable opposite (lower frequency) side suppression >issues, >but this cuts off at about 900 Hz > >On the higher side, I can hear signal to as far as my hearing and/or >the >audio chain permit. The most interesting note was that the undesired >signal >(high side only) takes a sharp dip or disappears every 50Hz, at .00 or >.05 >on the frequency readout. > >I'm not sure what to make of all this, but FWIW . . . > ______________________________________________________________ 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
