I almost had my K2 finished having send and receive on all but 12,15 and 17 meters. Decided to redo the 15 and 17 meter low pass torroidal inductors and after I finished had no receive at all and no transmit. Started troubleshooting and the transceiver, which has randomly come up with 080 info warnings began to come up with them more frequently. Additionally, if you tried to change bands, it would display my power out information even though I am not transmitting. I attacked the 080 problem using one of the articles on the website and everything checked out ok. So I decided to reset the radio with the 456 method. After that, nothing made any sense on the displays. I started checking all the pinouts on the control board to the rf board and my hand slipped, killing the radio - no displays, no relays, etc. I tracked down the problem to a bad 5 volt regulator on the control board and replaced that. Got five volts back but the regulator (7805) heated up quickly and the voltage went down to 2 volts. The MCU also got red hot in a few seconds. I ordered the firmware kit from Elecraft which would give me a new MCU and IOC. With the MCU removed, the 5 volt regulator is fine - doesn't overheat and stays at 4.99 volts. I hace checked all resistors on the control board and front panel and everything else seems fine. I think the MCU and IOC replacements should solve my problem. Any suggestions??
Allan ______________________________________________________________ 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
