Monitors, Supplies, poorly constructed LED light supplies (built into bulbs) in my personal experience are great sources of noise. I find them easy to figure out using my P3 when the level is low and then one by one eliminated potential sources. An LED lit TV used as a monitor is one of the low level issues I have found.
73, K9YEQ -----Original Message----- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ken Arck Sent: Sunday, September 18, 2016 9:13 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Noise when K-3 keyed I had the same problem - turned out to be noise from the computer (I was using the USB CODEC for audio in/out to the computer). Ken At 06:41 PM 9/18/2016, Fred Jensen wrote: >OK, this reply is to the list, lots of very smart and experienced folks there. > >Let's see what others come up with given that additional info. It >sounds to me like most if not all of the usual suspects are ruled out. > >73, > >Fred K6DGW >Sparks NV USA >Washoe County DM09dn > >On 9/18/2016 6:27 PM, Louis Ives wrote: >>Thanks for the reply. The noise is there in all modes and I am using >>Vox but the noise is there even when I key with foot ptt. I >>completely disconnected from the antenna system with same results. I >>tried with dummy load with same results. The noise almost sounds like >>what you would get with noise generator or other injected noise. >> >>>On Sep 18, 2016, at 9:12 PM, Fred Jensen <k6...@foothill.net> >>>wrote: >>> >>>Hmmm ... first thought would be RF in undesirable places. >>> >>>1. How are you asserting PTT? Foot or other switch, or VOX? >>> >>>2. If it's not VOX, is it really as soon as you press the switch, or >>>does it start as soon as you talk [which can often be almost >>>simultaneous]? FWIW: I once had a colleague who couldn't master >>>"point and click." His mode was click and then point at what he >>>wanted. Push then Talk totally eluded him. :-) >>> >>>3. What happens in CW mode? >>> >>>The K3 makes no RF in TX test, a big clue. Give us a few more >>>tidbits of info, like your antenna situation, actions into a dummy >>>load if you have one, etc. I'm sure you'll get a lot of help here. >>> >>>73, >>> >>>Fred K6DGW Sparks NV USA Washoe County DM09dn > >______________________________________________________________ >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 Message delivered to >k...@arcomcontrollers.com ---------------------------------------------------------------------------- -- President and CTO - Arcom Communications Makers of repeater controllers and accessories. http://www.arcomcontrollers.com/ Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net "We don't just make 'em. We use 'em!" ______________________________________________________________ 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 Message delivered to k9...@live.com ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
