Re: [Elecraft] noise on SSB modulation

2011-09-24 Thread Jim Brown
That works with Thinkpads of the T2x and T4x vintage. I suspect that it works with many others. I've been doing this for years to eliminate hum/buzz issues that result from leakage current from the AC power system. See http://audiosystemsgroup.com/HamInterfacing.pdf > If one is using a laptop,

Re: [Elecraft] noise on SSB modulation

2011-09-24 Thread David Gilbert
David Gilbert <mailto:xda...@cis-broadband.com>> > Subject: Re: [Elecraft] noise on SSB modulation > To: dk...@mmmonvhf.de <mailto:dk...@mmmonvhf.de> > Cc: elecraft@mailman.qth.net <mailto:elecraft@mailman.qth.net> > Message-ID: <4e7caefa.1060...@cis-broadband.com >

Re: [Elecraft] noise on SSB modulation

2011-09-23 Thread Martin
This occurs when CMP and MIC settings are very high, while TX Gate is set too low. Maybe an increase in TX Gate level and reducing MIC and/or CMP will cure the other problem with the transverter. -- 73, Martin DM4iM __ Elecraft mail

Re: [Elecraft] noise on SSB modulation

2011-09-23 Thread DK5EW
Hi all, I did manage it now by reducing mic and comp so its fine now. All settings was to much with 25 - now it is 10/15 with the HEIL. Thanks for fast answer - a good reflector ! I like it !;-) 73's Erwin/DK5EW Am 23.09.2011 12:39, schrieb DK5EW: > Hi all, > I use at my K3 a HEIL PRO SET ELITE "I

Re: [Elecraft] noise on SSB modulation

2011-09-23 Thread David Gilbert
If you are using any kind of rig control with your computer (and therefore have a shield connection between the K3 and the computer, such as via an RS-232 cable), make sure the chassis of your K3 is securely bonded to the chassis of the computer with a very short length of large gauge wire or

Re: [Elecraft] noise on SSB modulation

2011-09-23 Thread Buck k4ia
Try reducing your compression setting. I get a noise at 25 also. Buck k4ia K3 # 101 On 9/23/2011 7:33 AM, DK5EW wrote: > Dear Buck, > thanks for your tips but I'm not sure if I have to do any mor because my > K3 is brand new ! > It came 05.September 2011 and has serial 5776. > 73's Erwin/DK5EW

Re: [Elecraft] noise on SSB modulation

2011-09-23 Thread DK5EW
Dear Buck, thanks for your tips but I'm not sure if I have to do any mor because my K3 is brand new ! It came 05.September 2011 and has serial 5776. 73's Erwin/DK5EW Am 23.09.2011 13:24, schrieb Buck k4ia: > It is not a fan, it is RF or other noise getting back into the mic > circuit. I had the

Re: [Elecraft] noise on SSB modulation

2011-09-23 Thread Buck k4ia
It is not a fan, it is RF or other noise getting back into the mic circuit. I had the same problem. Check the two mods on the Elecraft K3 Enhancements and Application Notes page. Look for Older K3 Mods > "Front Panel Microphone" and "Improving the Immunity of the real panel RS232 and audio c

[Elecraft] noise on SSB modulation

2011-09-23 Thread DK5EW
Hi all, I use at my K3 a HEIL PRO SET ELITE "IC", I had this as I use it at my old ICOM IC-275H as well. Now I recognised that I have a small noise on modulation like a fan that gives me some power output when I just push PTT. OK I have in my shack 2 additional fans for cooling the PA so I switch