Connecting the RX directly to the antenna and the spurs are not there, the spurs are coming from the KPA500, and only when the KPA500 is connected to a radio (happens on all my radios connected to the KPA). Have tried the amp on 220 and 120, same issue. The KPA500 can be connected to a dummy load at the RF Out, and RF In to the RX and the spurs are there. With out a doubt they are being generated in the KPA500 when the LCD backlight is on, and these are healthy spurs.
I have spent hours taking the thing apart and putting back with the same results. Tripled checked all assembly with no luck. But I am 100% positive it is directly related to the LCD backlighting. This is a very weird issue! Gary Mitchelson NC3Z/4 Pamlico County, NC FM15 NC AHIMT COML SHARES NCS997 NC Deputy Auxcomm Coordinator - Statewide www.mitchelson.org On 3/9/2019 09:45, Andy Durbin wrote: > Nothing heard or seen on 10 m with my kit built KPA500. > > I'd suggest disconnecting the RX from the KPA500 and connecting it directly > to the antenna. Does the problem go away? > If not, connect the RX directly to the dummy load. Does the problem go away? > If not, disconnect everything else from the KPA500 except the power cord. > Does the problem go away? > If not, connect the KPA500 to an outlet on a different circuit. Does the > problem go away? > > Hopefully, one of these steps will give some information on the source of the > problem. > > 73, > Andy, k3wyc > > > > > > ______________________________________________________________ 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
