KX1 has LED switching noise

Posted by Paul Signorelli on Feb 10, 2012; 6:48pm
URL: http://elecraft.85.s1.nabble.com/KX1-has-LED-switching-noise-tp7273782.html


My old 2003 KX1 has low level LED/CPU switching noise.
The switching noise frequency is lower on L1 and higher (and amplitude higher)  on L6 (Brightest Level #6).
L4 is about 80 Hz.
Maybe the aluminum bypass (C10, C12) capacitors are opening up.
i hear it on all bands (I have an 80, 40, 30, 20 meter KX1) and at any battery voltage.
Anyone solve this issue?
Paul  w0rw
     
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html