[DSP-10] CW transmit has a raspy sound

[Ron Meiring]

Mhhh could be true, I have got the raspy audio and the fluorescent 
lights .....
However can't get rid of the lights ...
How do I get rid of the magnetic problems >?

Cheers
Ron VK6KDD

On Tue, 20 Dec 2005 05:29:00 -0500, David and Brenda Holman wrote:
>Mike and all,
>
>The 120 Hz you are seeing could very easily come from fluorescent
>lights.  This is a very common problem.
>
>David, KE3HF
>
>
>
>
>kd7ts wrote:
>
>>hello interested parties...
>>
>>When I displayed the Lees wave files on a waterfall I saw 120 HZ
>>signals nicely spaced, and easily observed.
>>
>>Thinking back to A.C. power supply theory, we have different ripple
>>
>>frequencies with different rectifier schemes, half wave, full wave
>>and
>>bridge. I'm a little hazy on this stuff, but would a magnetic field
>>
>>generated from 60 CPS mains have a 120 CPS effect ? Maybe there is
>>a
>>way to generate a 120 HZ magnetic field ?
>>
>>I just tried holding my Weller solder gun next to the DSP-10, and I
>>
>>see spurs every 60 cycles, not just every 120, when I pull the
>>trigger. ( I was watching a signal from my generator at 144.000600)
>>
>>I wish I had an answer, but instead, more questions..
>>
>>
>>Mike KD7TS
>>
>>
>>
>>
>>_______________________________________________
>>DSP-10 mailing list
>>DSP-10 at mailman.qth.net
>>http://mailman.qth.net/mailman/listinfo/dsp-10
>>