Hi Felipe, >> microham is being fed from K3 12v port. >>
This is not a good idea. Repeating W4TV's warning with a different choice of words.... The 12V at the K3 will vary up and down according to the audio current draw, at an audio rate. This variation in the 12V will now modulate anything else that uses it including audio circuits in the uHam gear. Depending on the characteristics this could cause the transmission from one rig to appear in the other. Even without uHam or other utility low level audio boxes, the same thing can happen with the two rigs if they share the same power supply. It would likely be a muddled sounding audio crosstalk, but based upon the degree of DC filtering in a rig or device, could be quite loud. Always run a separate small power supply to feed uHam devices and low level audio station utility gizmo's. Always use separate DC power supplies for SSB transceivers operated concurrently: one supply per transceiver. You can get away with mixed supply leads on CW, but NOT on SSB. 73, Guy. ______________________________________________________________ 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
