On 5/16/2010 11:22 AM, Dale Putnam wrote: > Hey Sam, > Good Morning, what may be happening, is your power supply has an > excessive amount of hum, or filtering has degraded. Why they may not > hear the hum when they use cw, is that their receivers cut off the hum > because the cw filtering doesn't usually listen that low. If you have > another supply, changing to it may have a significant impact. > I just went to battery power and hear the same hum
I have turned on a radio shack swl receiver sitting across the room and am using 0.10w output into the same antenna (dipole 24 ft up on roof) So now I hearing what I think they were talking about it's not exactly what I would call an 60 cycle ac hum but it does modulate the tune signal at a low frequency rate Ok including what should answer others posts as well. the only other ac field near by is a computer switching supply about a foot below, I don't think switching supplies create the kind of fields we are talking about in other posts? -- GB & 73 K5OAI Sam Morgan ______________________________________________________________ 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
