Greetings,
Working on a KPA 500, #2441. All bands except 40m work properly; 40m output is about 125w. Testing into a dummy load: Drive level: ~20w for all bands. Voltage and current levels all seem normal; lower PA current and slightly less voltage drop on 40m. SWR back to exciter (K3s) is 1:1 on all bands Output SWR on the internal meter reads 1:1, even on 40m No fault messages on any band, no smoke, no funny noises. The most obvious (to me) culprit is the 40m low pass filter. I was hoping to find an obviously fried cap or coil, but everything looks OK. A web search shows some folks reporting similar single-band faults, but they all have obviously fried components (usually a cap) on the RF or LPF boards. Is there anything else that could be at fault, other than the LPF circuit? It appears everything else is common to all bands. I'm not sure my test gear is sufficient to check the components in circuit. Thank you. ---- 73, Mike Cizek W0VTT ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
